Keyscan Inc. – Technical Guide (PC109x - 04.15)
Grounding Communication Cable Shield
When terminating the communication cable in the metal enclosure, ensure that the shield is insulated and
connected to the ground lug. Keyscan suggests Alpha PVC 10516 – 16 AWG clear tubing or a comparable
tubing to insulate the shield. Do not connect the shield to GND on a communication terminal block.
Ground Lugs
The metal enclosure includes one ground lug pre-mounted near the top and one spare ground lug, which can
be mounted to one of the available ground lug studs. You can re-locate the ground lug inside the metal
enclosure to minimize the length of shield used.
Note
Keep all shield wires and cables away from the control board.
Control Board – Mounting Locations
The following diagrams illustrate the mounting positions for control board series CA250, CA4500, CA8500,
EC1500 and EC2500 units. Illustrations also show mounting positions for communication boards and output
control boards (OCB-8). Different door control board series – CA250, CA4500, and CA8500 – can be used
within the same communication loop.
CA & EC Control Board Dimensions
Width 20.35 cm (8.01 inches)
Height 28.9 cm (11.38 inches)
Operating Environment – ACUs & ECUs
Temperatures: 41°F to 120°F (5°C to 49°C)
Humidity: 0% to 90% R.H., non-condensing
Important
Do not mount close to high voltage equipment.
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