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6 Pelco Manual C534M (2/98)
3.0 INSTALLATION
3.1 MOUNTING INSTRUCTIONS
The Relay Interface mounts in a 19-inch (48.26 cm) rack using standard mounting
hardware. The unit occupies 1 rack unit (1.75 in. or 4.45 cm) of vertical space. The
unit operates on TTL signals from the Controller. Because of distance limitations,
the unit must be mounted in the same rack as the Controller for proper operation.
3.2 CONNECTING TO THE CONTROLLER
The unit comes equipped with a pretested, 3-foot (0.91m) ribbon cable to connect
to the SPINC card located in the Controller. Prior to connecting the equipment, refer
to the Controller Manual for installation information.
To connect the two pieces of equipment, connect the supplied cable to the 50-pin
connectors located on the Relay Interface and the Controller. Refer to Table A for
the connector pin assignments.
3.3 CONNECTING POWER
The unit comes equipped with a 120 VAC or 230 VAC to 24 VDC wall-mount trans-
former. Plug the transformer into an appropriate location and connect the other end
to input connector on the rear of the unit. The unit is operational once power is
applied to the unit.
NOTE:
The Relay Interface unit can
be configured to provide either nor-
mally open or normally closed relay
outputs. The unit is shipped with all
outputs in the normally open mode
of operation. If you need to configure
outputs for normally closed opera-
tion, refer to Sections 3.5 and 3.6
prior to mounting the unit.
Table A. 50-Pin Connector
Function Pin Function Pin
+5V 50 +5V 25
+12V 49 -12V 24
NC 48 NC 23
NC 47 NC 22
NC 46 GND 21
GPI 1 (8) 45 GPI 1 (7) 20
GPI 1 (6) 44 GPI 1 (5) 19
GPI 1 (4) 43 GPI 1 (3) 18
GPI 1 (2) 42 GPI 1 (1) 17
NC 41 GND 16
GPI 2 (8) 40 GPI 2 (7) 15
GPI 2 (6) 39 GPI 2 (5) 14
GPI 2 (4) 38 GPI 2 (3) 13
GPI 2 (2) 37 GPI 2 (1) 12
NC 36 GND 11
GPI 3 (8) 35 GPI 3 (7) 10
GPI 3 (6) 34 GPI 3 (5) 9
GPI 3 (4) 33 GPI 3 (3) 8
GPI 3 (2) 32 GPI 3 (1) 7
NC 31 GND 6
GPI 4 (8) 30 GPI 4 (7) 5
GPI 4 (6) 29 GPI 4 (5) 4
GPI 4 (4) 28 GPI 4 (3) 3
GPI 4 (2) 27 GPI 4 (1) 2
GND 26 GND 1