Keyscan Technical Guide (PC109x - 04.12)
15
Terminate Wiring at the ACU
Terminate reader, lock, input, elevator floor, and elevator input wiring to the designated input terminals on the
appropriate door or elevator control boards or relay boards.
All Keyscan OCB-8 circuit board relays use Form C contacts with the following ratings:
• 30VDC – 5 Amps
• 24VAC – 10 Amps
Use a separate power supply for door locking devices. Do not use the DPS-15 power supply except for
powering the ACU circuit boards and readers.
Be sure to ground the shields of reader and communication cables to a single point cold water pipe ground at
the access control unit. Failing to ground the shields may cause incorrect card reads from noise or interference.
Jumpers
Keyscan factory defaults all control board jumper settings before they are shipped. However, Keyscan
recommends that you review the Jumper Settings section starting on page 53. You may have to reset jumpers
depending on the installation.
Communication
Communication must be established between the personal computers (PCs) with the Keyscan software and the
access control units. Communication is divided into 2 segments:
• Single ACU communication
• Multiple ACU communication
Test the communication ports on the PC(s) before connecting to the access control system.
Where a serial connection applies between the PC and the ACU and the span is greater than the maximum
allowable cable distance, use a Keyscan COMMex extender kit.
Power Up and Test Voltages
Be sure that all necessary power supplies have been installed. Use the DPS-15 power supply for powering the
ACU control boards and the readers only. Use the calculation tables in the Power-up and Test Voltages section
to estimate the current demand does not exceed the current rating of the DPS-15, otherwise you may require
an additional power supply.
A separate power supply must be used for door lock devices. Before applying power, verify all cable
connections are correct. Ensure no short circuits exist when measuring voltages. Verify DC polarity is correct
for all equipment.
Also, be sure to load the factory defaults immediately after the control board is initially powered up.
Power-up instructions and power calculation tables start on page 107.
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