Keyscan Inc. – Technical Guide (PC109x - 07.15)
It is important to ground the shields of the readers and communication cables to a single point cold water pipe
at the access control unit. Failing to ground the shields or using incorrect cables may cause noise or
interference and result in improper card reads.
Important
Ensure the chassis ground (GND) on the DPS-15 is connected to the metal enclosure ground lug.
Grounding Communication Cable Shield
When terminating the communication cable in the metal enclosure, insulate the shield and connect it 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.
Note
Keep all shield wires and cables away from the control board.
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