Remote Input or Output Components

Remote Input Components

This section includes design notes on the following devices:

• ScramblePads

• MATCH Reader Interface

• Readers

• Line Modules

• RQE Devices

• Door Contacts

• Surveillance Cameras

ScramblePads

The ScramblePad can be used to:

• Unlock doors

• Mask alarms

• Trigger relays for equipment or process control

Pull cable runs from the controller to ScramblePads for each door. Make sure you select the correct ScramblePad mounting box for the applications and conditions specific to each door. Pay special attention to the specified mounting height for the ScramblePad. If it’s not right, the ScramblePad will be difficult to use properly.

Table 1-11 shows the many types of ScramblePads that are available

The DS47L can be used in applications where an MRIB or an MRIA is used because it has the same bezel and physical tamper switch. The DS47L-SPX ScrambleProx provides a single device for card and code entry. The ScrambleProx also has a second reader port which can be used to connect a second reader to the other side of the door. This means that the ScrambleProx can be used to place dual technology on one side of the door and card access on the other side.

If you plan to use either the DS47L or the DS47L-SPX, you have several different configurations possible at the door site. Figure 1-31 through Figure 1-34 provide examples of several keypad configurations.

Open

Open

Figure 1-33 and Figure 1-34 show the typical ScramblePad-to-Controller connections for DS47L-series ScramblePads.

Open

Open

ScramblePad Mounting

The DS47L is ideal for normal lighting, such as interior walls and doorways. Mounting boxes for these keypads come in two main types: surface-mounted and flush-mounted.

Surface mounted boxes project from the wall on which they are mounted. Flush boxes are set into the wall so that they are flush with the wall.

Hirsch offers several varieties of each mounting box as shown in Figure 1-35. The dimensions for each of these boxes is shown in Table 1-12 in section “ScramblePad Mounting”. In addition, the Universal Mounting Kit (UMK) can be used with the MB2 and MBS2S to position the face at three different aspects: flush, semi-flush, and tilted (for handicapped).

For more information about installing mounting boxes, see “Installing the Mounting Box”. When ScramblePads must be installed on exterior walls or on gate posts, select the MB5 Exterior Mounting Box.
For exterior locations, consider one of these ScramblePad model options:

• DS47L-HI

• DS47L-SPX-HI

In high-ambient light conditions (which may occur indoors as well as outdoors), use the DS47L-HI or DS47L-SPX-HI. The standard ScramblePad uses Red LEDs which become unreadable in bright or direct sunlight. When ScramblePads are installed on east- or westfacing walls or gates, the display washes out in the morning or afternoon hours.

The high-intensity DS47L-HI or DS47L-SPX-HI uses the same off-white incandescent display used in commercial aircraft instrumentation. They are readable even in direct sunlight and highly reliable. The viewing restriction on the DS47L-HI or DS47L-SPX-HI is less restrictive: approximately 12° horizontally to help see the display or when installed in the MB5.

Figure 1-35 shows the ScramblePad and its available mounting boxes. For directions on mounting the ScramblePad, see “ScramblePad Installation”.

Open

The mounting height for each of these boxes is shown in Table 1-12 as measured from ground or floor level to the middle (centerline) of the ScramblePad in inches (and meters).

Most states require strict compliance with ADA (Americans with Disabilities Act) in addition to many local and regional code requirements. Consult your local codes for exact height requirements.

Select a mounting box which provides a convenient viewing angle for personnel confined to wheelchairs. The UMK provides several angles. The MB8, MB9, and MB20 are also tiltable for easy reading. To accommodate state and federal disabilities statutes, a tilted box may prove necessary. For information about installing mounting boxes, see “Installing the Mounting Box”.

See Figure 1-83 through Figure 1-88 for close-ups of ScramblePad Mounting Box types and dimensions.

Mounting Extensions

Hirsch mounting boxes can be fitted with two extensions:

• MBX – A ½- inch extension for surface-mounted boxes used with ScramblePad or bezel-mounted reader assemblies in cases where the mounting box depth is too shallow for the electronics, as with some of the ScrambleSmart products. The MBX package includes four extra long screws and is suitable for use with the MB2, MB2S, MB2SL, or UMK/MB2 (either sloped or semi-flush).

• MBX-FL – A ½-inch extension for flush-mounted boxes used with ScramblePad or bezel-mounted reader assemblies in cases where the mounting box depth is too shallow for the electronics, as with some of the ScrambleSmart products. The MBXFL includes four extra long screws and is suitable for use with the MB1.

Firestops for Mounting Boxes

Many installers are concerned about fire rating for their mounting boxes, particularly the MB2. The MB2 is not fire-rated; however, the box and its contents can be made fire-resistant using a hole-plug-type firestop. The firestop restores the wall’s fire rating.

To install it, simply mount the MB2 over a firestop. Firestops are available in many sizes and shapes and can be purchased from many suppliers. You can find most firestop manufacturers listed in the Thomas Register or through its webpage https://www.thomasnet.com/.

SPSH-1: Heated Back Cover for a DS47L ScramblePad

If you are using a DS47L ScramblePad in an environment where the temperature may drop below freezing or where condensation may be an issue, you can replace the reader’s standard back cover with the SPSH-1 heated back cover. For example, an SPSH-1 is recommended for outdoor applications (such as controlling access to a restricted parking area) in cold climates where a DS47L ScramblePad is enclosed in an MB5 mounting box and mounted on a pole.

The SPSH-1 draws its power from the G and the + connections of the DS47L (as shown in the following diagram), and it consumes 0.33 Amps at 28VDC.

Open

When the DS47L is powered by a controller:

• There can be only one DS47L with an SPSH-1 per door,

• There can be no more than two DS47Ls with an SPSH-1 per controller, and

• The maximum cabling distance between the controller and a DS47L with an
  SPSH-1 is half of the values shown in Table 1-6 in section “ScramblePad/MATCH Inputs”.

If you need to have more than two DS47Ls with an SPSH-1 connected to a controller, then

MATCH Reader Interface

The MATCH Reader Interface is required by all DIGI*TRAC controllers if you plan to attach any readers, unless one of these conditions exists:

• You are only using a ScramblePad without a reader.

• You are using a DS47L-SPX ScrambleProx which includes both a reader and a MATCH.

• You are using a DS47L-series ScramblePad which includes a MATCH and a standard 26-bit card reader.

• You are only using a Wiegand card reader which is directly wired to a Wiegand terminal on an Mx series controller.

• You are using keypads/readers which are wired to the RS-485 OSDP terminal on an Mx-1 or Mx-1-ME controller.

The MATCH Reader Interface enables a large number of reader technologies to communicate successfully with a DIGI*TRAC or Mx controller.

Hirsch provides three MATCH Reader Interface configurations:

• MATCH2 Reader Interface Board (MRIB)

• MATCH2 Reader Interface Assembly (MRIA)

• DS47L-series ScramblePad with integrated MATCH

The new MATCH2 board has fewer components than the old MATCH, but includes more functionality. The MATCH2 provides a second switch bank which can be programmed to accept a large selection of custom readers.

Open

The MRIB consists of a printed circuit board mounted between two protective metal plates with keyhole mounting slots. The MRIA includes the MRIB which is attached to a mounting base and bezel. The bezel is the same as the one included with a ScramblePad and includes a physical tamper switch. The MRIA is designed for installation on a Hirsch mounting box. For a description of available mounting boxes, see “MRIA/MRIB Mounting”.

The MATCH is also integrated into the DS47L-series ScramblePads. These keypads can be used in much the same manner as a MATCH. But there are differences: while a DS47L ScramblePad can support one or two readers for dual entry or dual entry-card only exit, a MATCH can support two readers and two ScramblePads for dual entry and dual exit. Another and often better solution is to use DS47L ScramblePads, each with an associated reader.

The MRIB is normally located in close proximity to the readers it will connect to, as shown in Figure 1-37. The MRIB is usually installed above the ceiling line. A junction box (J-box) is often used to house and protect the board above the ceiling line. An MRIA in a Hirsch mounting box can also be used.

Open

Whether integrated or separate, the MATCH can supply 250mA to each reader using 5VDC. Readers which require more than 250 mA current (or other voltage levels) must always use a separate power supply. In addition, one or two ScramblePads can be connected to each MATCH. The MATCH should be located at the door or control location.

Each MATCH includes two reader connectors with 12-inch flying leads. The allowed maximum distance between the MATCH and a connected reader varies according to the reader. For example, the Hirsch CR11L Mag Stripe Card Reader can be located up to 500 feet (152 meters) from the MATCH to which it is connected. For maximum allowed distances between the MATCH and your selected reader(s), see “MATCH
Reader Installation” or refer to the literature shipped with your reader(s).

To increase the length beyond the prescribed maximum, the MATCH or attached reader must be powered locally. This eliminates the need for power from the controller and increases the allowed wire length. For more about powering a MATCH or reader, see Figure 1-110, “Powering the MATCH Locally (Schematic)”.

The dimensions and weight of the MATCH board and assembly are listed below:

Figure 1-38 provides an example of the connections between the MATCH, the reader, the ScramblePad, and the controller:

Open

The flying lead which connects the reader to the MATCH through one of two connectors on the board must conform to the wiring standards shown in Figure 1-38.

With a DS47L-series ScramblePad, a reader can be connected at a door without using an additional MATCH. The reader connects to the DS47L (and its integrated MATCH) and the ScramblePad then connects to the controller, as shown in Figure 1-39.

Open

For more about setting up the MATCH and installing it, see “MATCH Reader Installation”. When installing a DIGI*TRAC MATCH Enrollment Station (DMES), locate the ScramblePad/Reader tandem close to the controller and its printer. The maximum distance allowed between the DMES and the controller can be calculated using Table 1-7 (refer to the maximums for a MATCH and ScramblePad).

For more information about Enrollment Stations, see “Enrollment Station Installation”.

MRIA/MRIB Mounting

There are four mounting boxes available for the MRIA: the MB1, MB2, MB3 and MB4. The MRIB is usually mounted in a separate J-Box using the keyhole slots (see Figure 1-38). Choose the box that fits your system requirements.

Figure 1-40 shows the available MRIA mounting boxes. For directions on mounting the MRIA in an MB1, MB2, MB3, or MB4 mounting box, see “Installing the Mounting Box”. For instructions on mounting the MRIB, see “MATCH Interface Installation”.

Open

MATCH-Compatible Readers

Readers are a general category of access control devices that include:

• Mag Stripe Card Readers (insertion and swipe)

• Proximity Card Readers

• Wiegand Card Readers

• Biometric Readers (e.g. Hand Geometry, Retinal Scanner)

• Barcode Readers

• Infrared Readers

• Wiegand-Compliant Keypads

When used in conjunction with the MATCH Reader Interface, most readers can communicate with Hirsch DIGI*TRAC or Mx controllers. Hirsch’s MR11LA includes an MRIA. The MR11LA consists of a CR11L magnetic stripe card reader mounted on an MRIA. The CR11L is small enough to fit within the MRIA bezel.

An example of how an MR11LA might work at a door is shown in Figure 1-41.

Open

In addition, the DS47L family of ScramblePads includes an integrated MATCH which can support one or two readers (the D47L-SPX ScrambleProx also includes a built-in proximity reader). All other readers require the purchase of a separate MATCH and the connection of the reader to the MATCH Interface.

A complete list of ScramblePad DS47L readers with the MATCH already installed is shown in Table 1-13.

Older readers require the purchase of a separate MATCH and the connection of the reader to the MATCH Interface. Newer readers which have a Wiegand or an RS-485 OSDP interface can be connected directly to the appropriate terminals on an Mx, Mx-1, or Mx-1- ME controller.

Line Modules

Line Modules are a necessary component of the line module input circuits from the controller. In addition to providing supervision of the wiring from a controller, the line module also supports a request to exit (RQE) input and a tamper input.

Line Modules provide supervision by indicating when a circuit is shorted, opened, noisy, and/or out-of-spec. These conditions are usually considered attempts to breach the security of the system and are therefore monitored and reported on an input-by-input basis at all times for enabled inputs. The controller digitally processes the analog measurement of the circuit resistance at an effective 100 times per second rate. The circuit measures variation in conditions (±2% with the DTLM3 Line Module and ±4% with the DTLM1/2 Line
Modules) then reports any appropriate alarms upon detection.

Hirsch provides two types of line modules:

• DTLM (Screw Terminals)

• MELM (Flying Leads)

There is also a door contact with integral line module:

• SBMS3-2707A
  Each line module type is explained in this section. For detailed information about setup, mounting, and installation of line modules, see “Line Module Installation”.

DTLM

The DIGI*TRAC line module (DTLM) provides terminal block connections. It is recommended that DTLMs be limited to a single sensor per input. The DTLM is used for the RQE, Auto-Relock, Door Forced, and Door Open Too Long (DOTL) functions. There are three types of DTLM:

• The DTLM1 has one input and is used for alarm applications with ±4% sensitivity.

• The DTLM2 has two inputs and is used when an RQE device is required to mask the line module input and, optionally, trigger the door lock with ±4% sensitivity.

• The DTLM3 has three inputs and is used in high security applications where alarm, RQE, and tamper detection are required with ±2% sensitivity.

• DTLM inputs are labeled 1, 2, and 3 for simplicity in which 1 normally connects to the door contact or alarm sensor, 2 connects to the RQE, and 3 monitors a Tamper switch.

As shown in Figure 1-42, the default configuration for line module input circuits is normally closed. For a closed circuit, the controller instantly reports an alarm for any attempt to tamper with or cut the circuit. For a normally open circuit, the circuit cannot be monitored and tampering goes undetected. All input devices must be isolated ‘dry contact’ types. (A dry contact is a switch or relay which provides no power to the circuit.)

Open

Confirm the polarity of the HI / LO terminals at both ends of the DTLM cable run. HI must be linked to HI; LO must be linked to LO. Connect the shield at the controller terminal and let it float (don’t connect it) at the DTLM end.

A separate cable is required from the controller to the DTLM. ScramblePad/MATCH reader cable (2-pair stranded, twisted overall shield) and DTLM cable (1-pair stranded, twisted, overall shield) can be run together in the same conduit; however, each pair must be individually shielded.

It is recommended that the DTLM should be as close to the sensor(s) it connects as possible for optimum performance.
The dimensions and shipping weight for each DTLM is shown in Table 1-15:

For maximum cable lengths between the controller and each DTLM module, see “Typical Line Module Inputs”. For detailed information about installation of DTLM, see “Wiring the DTLM Line Module”.

MELM

The MELM (Miniature Embedded Line Module) performs the same functions as a DTLM, except it is much smaller and has flying leads instead of terminal connections. It is ideal for installation inside the RQE or alarm device housing. MELMs provide a pair of flying leads per input:

• The MELM1 has one input and is used for alarm applications.

• The MELM2 has two inputs and is used when an RQE device is required to mask the line module input and, optionally, trigger the door lock.

• The MELM3 has three inputs and is used in high security applications where alarm, RQE, and tamper detection are required with ±2% sensitivity.

Instead of marked terminals, the MELM has colored wires (flying leads) as shown in Table 1-16.

As shown in Figure 1-43, “MELM Wiring”, in section “MELM”, the default configuration for line module input circuits is normally closed. For a closed circuit, the controller instantly reports an alarm for any attempt to tamper with or cut the circuit. For a normally open circuit, the circuit cannot be monitored and tampering goes undetected.

The dimensions and shipping weight for the MELM is shown in Table 1-17:

For maximum cable lengths between the controller and each MELM module, see “Typical Line Module Inputs”. For detailed information about installation of MELM, see “Wiring the MELM Line Module”.

Wiring for the MELM line modules is shown in Figure 1-43:

Open

SBMS3

The SBMS3-2707A consists of a balanced magnetic switch (Sentrol Model #2707A-L14) with an MELM3 factory installed. This door contact is tamper protected and wiring is supervised all the way to the unit without an external line module. External wires are available for connecting the controller and an RQE device.

For more about the SBMS3, see “Door Contacts”. For information about the setup and installation of the SBMS3, see “Mounting and Wiring the SBMS3”.

Request-To-Exit Devices (RQE)

RQEs are for doors that are either:

1.Being monitored by the access control system, or

2.Equipped with a magnetic lock.

There are several types of RQE devices which include:

• Exit Bar with switches built into the door hardware

• Push Buttons

• Motion or Presence Sensors

The purpose of an RQE is to mask the alarm on an authorized exit and unlock the lock if required. They can be setup to trigger once only, or to continually retrigger while actuated (for use with motion detector RQE devices).

An RQE may also be used as a remote door release at a receptionist station permitting the entry of visitors requesting access.

An alternative to an RQE is a ScramblePad or Reader. A ScramblePad/Reader can be used as an exit device that logs users out of the secure area. It is slower than an exit bar or sensor, but provides an audit trail, recording the identity of personnel who exit a room or facility. Exit ScramblePads or Readers are also required for specialized passback control as well as occupancy tracking and control applications.

For maximum cable lengths between the controller and each RQE, see “Typical Door Relay Outputs” .

Door Contacts

Door Contacts are devices which sense whether the door is open or closed. Most modern door contacts are two-piece magnetic devices, with one part installed on the door frame and the other part installed on the door itself. For normally closed contacts, when the door is closed, the contact is closed; when the door is open, the contact is open. Because the door contact is usually a simple circuit, any attempt to tamper with the contact will also produce an open condition and trigger the device.

All door contacts must be connected to line modules and may be either normally open or normally closed devices.

Hirsch provides a very secure door contact, the SBMS3, which includes an integrated MELM3 module. Because the line module is combined with the door contact, any attempt to tamper with the door contact will trigger the MELM3’s tamper alarm.

Figure 1-44 provides an illustration of the most common door contact.

Open

For maximum cable lengths between the controller and each door contact, see “Typical Door Relay Outputs”.

Remote Output Components

This section includes design notes on the following devices:

• Locks/Strikes

• Doors

• Gates

• Turnstiles

• Elevators

• HVAC/Lighting

• Printers

Locks/Strikes

Installing electric strikes or magnetic locks requires specific training and skills. In new construction projects, electrified hardware is often supplied by hardware distributors and installed by the general contractor. Be aware that often these devices are not properly installed and checked out by the contractor. If these devices do not work properly, the entire security system will not be acceptable.

If you are not comfortable with installing a locking device, the best choice might be to subcontract the lock work to a qualified industrial locksmith. There are many choices in electrified hardware depending on door and frame conditions. It is possible to violate building and fire codes by substituting improper electric locks for existing mechanical hardware. If you have any doubts, get help.

For detailed information about installation of locks and strikes, see “Door Relay Installation: Strikes and Locks”.

Open

To determine the maximum distance for lock power cable in feet and (meters) for a
particular application, see “Typical Door Relay Outputs”.

Alarm Relays

Alarm relays are dedicated relays for interface to local alarm annunciators or remote monitoring stations.

When an alarm condition occurs, a controller can activate the alarm relay for a programmable time based on default settings or operator-selected control settings.

In addition to routing alarm conditions to alarm relays, the user can also route alarm conditions to unused on-board door relays or expansion board relays, as required. For example, an alarm condition can be programmed to trigger a control zone, thereby causing special control conditions or annunciation to take place.

Doors

Doors can be thought of as a grouping of relays, alarm inputs, and readers/keypads. In most configurations, a door is comprised of one relay, one alarm input, and an entry and/or exit reader/keypad. When defining these three components for a door, make sure they are wired to the controller in a logical manner. For example, when connecting the components of Door 1 to the controller, make sure to wire the alarm input to Input 1 on the controller and the relay for that door to Relay 1 on the controller. You wouldn’t want to connect the relay for Door 2 to Relay 1 on the controller anymore than you would want to connect Input 2 on the controller to the input on Door 1.

Hirsch controller firmware makes certain assumptions about door logic, the most important being that relays, inputs, and readers are grouped by door. In fact, the concept of control zones does not work properly unless you have wired the components for each door to the controller in a logical manner.

The electrical ratings of the door relays vary for the different controllers:

The M2 and M8 controllers used large heavy-duty socketed relays rated for 24V DC, 10 Amp loads.

The Mx controller uses Form C relays rated for 30V DC, 5 Amp loads.

The Mx-1 and Mx-1-ME controllers have a Door Relay terminal which can be configured (using jumpers) for either:

• Wet Mode at 24V DC, providing a maximum of 0.25 Amps

• Wet Mode at 12V DC, providing a maximum of 0.5 Amps

• Dry Mode, providing a maximum of 2.0 Amps at either 30V DC or 250V AC
  For details, see the description of the Door Relay terminal in Table 3-1 in section “Mx-1 Controller”.
  If a door must be kept locked, there are typically two types of locks utilized:

Electric Strikes

Magnetic Locks

Electric Strikes can be either 12- or 24-VDC and are either fail safe (unlocked when deenergized) or fail secure (locked when de-energized), though most are fail secure. Magnetic locks can also be either 12- or 24-VDC and are fail safe devices only. Both types require installation of either an MOV (for AC and DC) or diode (DC only) at the lock unless the lock provides its own power suppression. The following figure provides examples of Electric Strike and Magnetic Lock Doors.

Open

For more about doors, see “Door Contacts”.

For a door managed by an Mx controller, see “Wiring for a Door”.

For a door managed by an Mx-1 or Mx-1-ME controller, see “Wiring for the Door”.

Gates

The relay from the controller is normally tied into a self-powered input on the gate control system. Do not run gate motor voltages of 50V AC or higher through the relays in a DIGI*TRAC Controller. Instead, use an interposing relay when controlling the gate control system’s gate motor directly.

Open

Entering Gates

For a vehicle gate entrance, when choosing the location for the ScramblePad or MATCH and Reader, keep the following issues in mind:

• Does the location accommodate a Hirsch mounting post and MB5 mounting box?

• If the gate in question is used by both high cab trucks and passenger vehicles, you have the option to install double ScramblePads (or MATCHs and Readers) – one at normal vehicle height (curb or street mounting) and one at truck height. A custom mounting post would have to be fabricated for the truck height.

• An alternative to dual ScramblePads (or dual MATCHs and Readers) is one ScramblePad (or MATCH and Reader). This means truck drivers must get out of their vehicle to use it. This alternative can cause an inconvenience, especially in bad weather areas.

• The high-intensity version of the ScramblePad is always recommended for exterior gate control applications. It has less viewing restriction and a brighter display, which makes viewing easier from a vehicle.

Exiting Gates

In most cases exiting from a controlled gate is automatic. The presence of the vehicle is detected by a magnetic loop buried in the asphalt or concrete on the approach side of the gate. This loop is tied into the gate controller and opens the gate for free exit. In other cases, where higher security is required, an exit ScramblePad (or MATCH and Reader) can be installed requiring a code (or card) for exit as well as for entry.

On personnel gates in fence lines, ScramblePads or MATCH readers are often mounted on fence posts adjacent to the personnel gate. The gates sometimes use special types of electrified
hardware, although magnetic locks are being used more often in these applications.

An RQE device or exit ScramblePad are normally used on personnel gates for exit control. They must be properly protected from someone reaching through the fence to unlock the gate to gain unauthorized entry.

Turnstiles

Turnstiles can be used as alternatives to doors or gates. There are several types of turnstiles:

• Full Height Turnstile

• Half Height Turnstile

• Optical Turnstile

Turnstiles, Gates, and Doors share most of the same power and wiring specifications. Each is discussed in this section.

Full Height Turnstile

Full height turnstiles are for facilities that require single person access. They are usually installed outdoors or in lobbies of large facilities and are locked from rotation by a solenoid.

A common access control application can have the turnstile locked for entry only and free for exit. In other applications, it is locked in both directions.

Open

A ScramblePad/MATCH reader can be installed for entry and exit control. However, special mounting brackets may have to be fabricated to mount any of the ScramblePad mounting boxes.

If you’re installing a turnstile outdoors with a ScramblePad, you have the option to use the DS47L-HI or the DS47L-SPX-HI along with the MB5 mounting box.

Open

Half Height Turnstile

Half height turnstiles are typically used for two-way pedestrian control. However, it may be locked from rotation (by a solenoid) for entry only and free for exit. Other applications might have the turnstile locked in both directions.

Open

A ScramblePad/MATCH reader can be installed for entry and exit control. However, special mounting brackets may have to be fabricated to mount any of the ScramblePad mounting boxes.

If you’re installing a turnstile outdoors with a ScramblePad, you have the option to use the DS47L-HI or the DS47L-SPX-HI along with the MB5 mounting box.

Open

Optical Turnstile

Another type of turnstile is the optical turnstile, or “passageway.” It is an attractive turnstile, used in lobby installations, and is a little faster than traditional rotating devices. It does use more floor space, however, and is not designed for exterior use. An invisible barrier created by an infrared beam activates an audible and visual alarm when broken.

Open

The design allows a large number of authorized users into and out of a facility with little delay. Authorized users simply mask alarm detection when they enter their codes or present their cards, thus allowing free passage through the passageway.

If unauthorized users walk through an active passageway without entering a valid code, the alarm will not be masked when the beam is broken. Typically these turnstiles are under observation by guards so they can respond to the audible and visual alarms produced by any unauthorized access attempts. Installing ScramblePads/MATCH readers on passageways will require close cooperation between the passageway manufacturer, the system installer, and the owner to optimize the throughput for the controlled facility.

HVAC, Lighting, and Elevator Control

Heating, ventilation, air conditioning, lighting, and elevator control are generally handled by the smaller 24 VDC, 2A relays found on expansion boards and M64 controllers. The M64 is specifically designed for this kind of control switching. One of the chief uses for the M64 is elevator control. Other uses include HVAC, lighting, prison door control, interlock, and CCTV.

For more information about setting up and installing these components, see “HVAC, Lighting, and Elevator Control”.

Elevator Control