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Figure 2-3: Mx -S3OB Controller Main Board Connectors and Components

Relays come in two sizes:

• Larger (5 ampA, Form C) relays for controlling door access devices, such as magnetic locks and electric strikes, and

• Smaller (1 ampA, Form C) relays for executing various types of alarm events.
  Terminal Blocks are the green plastic components into which wires are inserted from input/output devices. An Mx Controller provides a certain number of terminal blocks — - and through them connections to input/output devices — - which you can increase by adding optional expansion boards.

• The 3-wire (Door Input, Door Relay, and dedicated Alarm Relay) terminal blocks are used for analog inputs, such as multi-state alarm inputs through the line modules, and two-state outputs such as magnetic locks and electric strikes.

• The 5-wire MATCH terminal blocks are used for connecting the wiring from Scramble Pad keypads or readers (through the MATCH2 Reader Interface). These are digital circuits which support daisy-chain connections to multiple devices on the same circuit.

  • The 6-wire terminal blocks are used for connecting the wiring from a 12VDC keypad or reader with a Wiegand interface. These are designed to support a variety of 125 kHz and 13.56 MHz readers and credentials.

AUX RS485 Terminal was originally planned to later enable you to communicate with RS485 RS-485 serial devices (such as readers and other interfaces), using protocols such as the Open Supervised Device Protocol (OSDP). This capability is now provided by the RREB; see “RS-485 Readers Expansion Board (RREB)”.

SNIB3 RS485 Terminal (and DIP switches) enables you to securely communicate with downstream Mx series or DIGI*TRAC controllers (managed by the same computer).

Ethernet Connector (and DIP switches) enables you to connect to a LAN/WAN and communicate with a computer running Velocity.

Fuses are mounted by the power supply connector and the standby battery connector. (All reader terminals are protected with resettable fuses.)

Expansion Board Connector links any expansion boards mounted in the Controller enclosure to the Controller Main Board.

Status LEDs provide quick visual diagnostics on the current operation of the Controller.

Reset Button performs three types of reset depending on how long you hold down the button, as explained in “Resetting the Controller”.

Command and Control Module (CCMx) contains the firmware that embodies the logic and control functions of the controller, including the DIGI*TRAC Control Language. Firmware can be downloaded from Velocity, or the CCMx can be reprogrammed on a Flashmaster device.

Power Supply Connector provides cable connection to the Internal Power Supply.

Standby Battery Connector provides cable connection to the backup battery.

Enclosure Tamper Switch Connector provides a cable connection to the Tamper Switch on the Controller enclosure. Whenever the enclosure door is opened, the tamper switch alarm is activated.

Internal Power Supply

The Internal Power Supply can use either a 110 or 240 VAC 240VAC supply (or 100 VAC 100VAC for Japan) to provide DC power to the Controller Main Board and attached Expansion Boards. Depending on your controller, this means support for up to 16 ScramblePads or combination of ScramblePads and readers. For input and output devices requiring power – - such as electric strikes and magnetic locks, motion detectors, retinal scanners, and surveillance cameras – - auxiliary power supplies must be used.

Standby Battery

This component supplies 24 VDC24VDCof backup power to the Controller Board even if primary AC power fails. This battery is capable of supplying power to the Controller Board for several hours. The standby time is dependent on the connected devices and can be calculated by using the formula found in “Mx Controller Standby Battery Capacity”.

Under normal conditions, the standby battery has a life span of 4 to 5 years. Its status can be interrogated using Velocity’s Diagnostic Window. For more information, see the topics in the section about “Performing Periodic Maintenance for an Mx Controller”.

Tamper Switch

The tamper switch is a contact switch that is normally closed while the door to the controller enclosure is closed. Opening the enclosure door opens a circuit, which generates a message that is sent to Velocity, enabling the event to be viewed in real-time and logged for later analysis.

Expansion Boards for the Mx Controller

Optional expansion boards increase the capabilities of Mx Controllers. For example, the Alarm Expansion Board increases the number of line module inputs that the controller can accept, and the Relay Expansion Board extends the number of control outputs that a controller can accommodate. The MEB series increases the controller’s available memory, expanding the number of alarm and event buffers or codes the controller can hold.

Table 2-1 provides an overview of the available expansion boards. An Mx Controller can accommodate up to 5 expansion boards, subject to the restrictions explained in this table.

Table 2-1: Expansion Boards for the Mx Controller

All expansion boards have the same dimensions and shipping weight:

The ribbon cable used to connect these boards to the Controller board is the EBIC5, which can link up to five expansion boards. For detailed information about the setup and installation of expansion boards, see “Expansion Board Installation”.

Data Capacity of an Mx Controller

An Mx controller includes a base amount of memory which is dedicated to storing data about credentials, events, and alarms. (This memory enables the controller to continue performing its functions even when it is temporarily unable to communicate with the Velocity server.)

The data capacity of an Mx controller can be increased by adding optional expansion boards. An expansion board can be configured so that its memory is dedicated either solely to additional credentials, or to a mixture of additional credentials, events, and alarms.

The following table shows the maximum data capacity of an Mx controller in its base configuration and with various optional expansion boards configured either way.

Table 2-2: Data Capacity of an Mx Controller

Note that your system’s actual capacity could be less, as explained in “Velocity Features that Reduce Available Memory”.

Replaceable Parts of an Mx Controller

The following table provides specifications for the replaceable parts of the different models of the Mx controller.

Table 2-3: Replaceable Parts for the Different Models of the Mx Controller