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To mount the SNIB3 expansion board:

  1. Turn all system power off: remove the connector for the standby battery, disconnect the AC power connector or the power supply fuse.

  2. Install the new SNIB3 board into the upper left corner of the enclosure using the supplied screws. If there are additional expansion boards to install, install them first using the supplied standoffs. Install the SNIB3 board last so that it is at the top of the stack.

  3. Connect the EBIC5 connector. Reconnect the AC power connector (or power supply fuse), then reconnect the standby battery connector. The controller board's yellow test LED should light; the other lights go through a start up sequence. When the sequence is complete, the yellow test LED goes out and the other lights stabilize.

  4. If required, connect an RJ-45 network cable to the SNIB3 Ethernet connector.

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If you stack boards, make sure the SNIB3 is on top of the stack, so you can wire the board, configure its DIP switches, and view its status LEDs.

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Before installing the SNIB3, you must first set the required DIP switches on the three switch banks:

Switch Bank 1 (SW1)

S1 - 4

OFF

This SNIB3 is in the middle of a multidrop sequence.

ON

This SNIB3 is either first (master) or last (termination) in the multidrop sequence

Switch Bank 2 (SW2)

S1

OFF

This SNIB3 communicates with the host PC using the encryption keys stored in memory.

ON

Return the encryption keys to their default settings. If this switch is set when the SNIB3 powers up or reboots after a firmware upgrade, the keys reset. This switch can be turned off after the LED patterns begin to light. See the DIGI*TRAC Design and Installation Guide. If this is the master SNIB3, you must also ‘Reset Encryption’ on the Velocity Port settings. All downstream units must have their encryption keys reset as well. If this is a downstream unit, the master SNIB3 automatically detects that the keys have been reset.

S2 - 3

OFF

Normal operation. (ON only when resetting to factory defaults)

S4

OFF

This SNIB3 is NOT first in the multidrop sequence, or you only have one controller.

ON

This SNIB3 is first in the sequence (master) and is connected to the host via Ethernet. This SNIB3 controls polling. A SNIB3 must be the master.

Baud Rate Settings (S1 – S2 in SW3)

S1

OFF

OFF

ON

ON

S2

OFF

ON

OFF

ON

bps

9600

38400

57600

115200

This controls the baud rate for the RS-485 multi-drop line. 57600 and 115200 bps are only available if your RS-485 cables are made from Cat5 or Cat6 data grade wire. These speeds are NOT recommended for installations using:

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To connect RS-485 serial cables between SNIB3s:

  1. Turn all system power off by first removing the connector for the standby battery, then disconnect the AC power connector or the power supply fuse.

  2. Punch out the knockout in the controller enclosure where you plan to route the RS-485 cable. You can either route this wire through the same opening you’re using for controller board connections, or knock out a new opening.

  3. Route the wires through the opening. If it makes serial wiring easier, detach each green connector from the board as needed.

  4. Loosen the screws on each RS-485 connector plug you will be using.

  5. Remove insulation from the wire and insert the specified wires into the green connectors at the required slots as shown to the right.

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  6. Tighten the screws until the wire is securely fastened in the slot.

  7. If you removed the green connector in step 3, push the green connector into the appropriate socket until it locks into place. The connector and socket are keyed, so there is only one way to plug it in.

  8. Reconnect the system power by first connecting the AC power connector, then connecting the standby battery connector.

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Communications become less robust as baud rates increase, wire gauge decreases, and distances increase. Most tables in the DIGI*TRAC Design and Installation Guide for wire gauge and distance are based on 9600 baud. At higher baud rates, maximum distances are decreased and minimum wire gauge is increased. It may not be possible to implement the higher baud rates supported by the SNIB2 or the SNIB3 if you have long wire runs or small wire gauges. Higher baud rates are also more dependent on the number of twists per foot, so capacitance specifications must be strictly followed: total wire run per port is not to exceed 100,000 pf per foot.

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To use the SNIB3, your controller needs CCM firmware version 7.5.37 or higher with Velocity version 3.6 SP1 or higher.

Network Address Settings (S3 - S8)

Address

S3

S4

S5

S6

S7

S8

1

OFF

OFF

OFF

OFF

OFF

ON

2

OFF

OFF

OFF

OFF

ON

OFF

3

OFF

OFF

OFF

OFF

ON

ON

4

OFF

OFF

OFF

ON

OFF

OFF

5

OFF

OFF

OFF

ON

OFF

ON

6

OFF

OFF

OFF

ON

ON

OFF

7

OFF

OFF

OFF

ON

ON

ON

8

OFF

OFF

ON

OFF

OFF

OFF

9

OFF

OFF

ON

OFF

OFF

ON

10

OFF

OFF

ON

OFF

ON

ON

11

OFF

OFF

ON

OFF

ON

ON

12

OFF

OFF

ON

ON

OFF

OFF

13

OFF

OFF

ON

ON

OFF

ON

14

OFF

OFF

ON

ON

ON

OFF

15

OFF

OFF

ON

ON

ON

ON

16

OFF

ON

OFF

OFF

OFF

OFF

17

OFF

ON

OFF

OFF

OFF

ON

18

OFF

ON

OFF

OFF

ON

OFF

19

OFF

ON

OFF

OFF

ON

ON

20

OFF

ON

OFF

ON

OFF

OFF

21

OFF

ON

OFF

ON

OFF

ON

22

OFF

ON

OFF

ON

ON

OFF

23

OFF

ON

OFF

ON

ON

ON

24

OFF

ON

ON

OFF

OFF

OFF

25

OFF

ON

ON

OFF

OFF

ON

26

OFF

ON

ON

OFF

ON

OFF

27

OFF

ON

ON

OFF

ON

ON

28

OFF

ON

ON

ON

OFF

OFF

29

OFF

ON

ON

ON

OFF

ON

30

OFF

ON

ON

ON

ON

OFF

31

OFF

ON

ON

ON

ON

ON

32

ON

OFF

OFF

OFF

OFF

OFF

Network Address Settings (S3 - S8) Continued from Previous Table

Address

S3

S4

S5

S6

S7

S8

33

ON

OFF

OFF

OFF

OFF

ON

34

ON

OFF

OFF

OFF

ON

OFF

35

ON

OFF

OFF

OFF

ON

ON

36

ON

OFF

OFF

ON

OFF

OFF

37

ON

OFF

OFF

ON

OFF

ON

38

ON

OFF

OFF

ON

ON

OFF

39

ON

OFF

OFF

ON

ON

ON

40

ON

OFF

ON

OFF

OFF

OFF

41

ON

OFF

ON

OFF

OFF

ON

42

ON

OFF

ON

OFF

ON

OFF

43

ON

OFF

ON

OFF

ON

ON

44

ON

OFF

ON

ON

OFF

OFF

45

ON

OFF

ON

ON

OFF

ON

46

ON

OFF

ON

ON

ON

OFF

47

ON

OFF

ON

ON

ON

ON

48

ON

ON

OFF

OFF

OFF

OFF

49

ON

ON

OFF

OFF

OFF

ON

50

ON

ON

OFF

OFF

ON

OFF

51

ON

ON

OFF

OFF

ON

ON

52

ON

ON

OFF

ON

OFF

OFF

53

ON

ON

OFF

ON

OFF

ON

54

ON

ON

OFF

ON

ON

OFF

55

ON

ON

OFF

ON

ON

ON

56

ON

ON

ON

OFF

OFF

OFF

57

ON

ON

ON

OFF

OFF

ON

58

ON

ON

ON

OFF

ON

OFF

59

ON

ON

ON

OFF

ON

ON

60

ON

ON

ON

ON

OFF

OFF

61

ON

ON

ON

ON

OFF

ON

62

ON

ON

ON

ON

ON

OFF

63

ON

ON

ON

ON

ON

ON

Installations with NETMUX4s support up to 63 controllers. Installations without NETMUX4s are limited to 16 controllers, which can have any address in the range 1-63. Where possible, limit your multi-drops to 16 units for optimum speed and performance. Even at 9600 bps, two 16-unit configurations outperform one 32-unit configuration.

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