Keyscan CA250B Technical Instructions page 121

WIEEX2 (RS485) - Installation Notes
Existing 22 AWG UTP can be used between a WIEEX2 transmitter and receiver provided it is in good condition
without breaks or high impedance splices. Nominal resistance for 22 AWG UTP is approximately 18 ohms/1000
feet.
Short J1 on the WIEEX2 transmitter and receiver.
Connect the WIEEX2 transmitter (TX) to the reader, door contact, request to exit device, auxiliary input, and
door lock, whichever are applicable.
Connect the WIEEX2 receiver (RX) to the appropriate ACU terminals.
Power the transmitter with a 12 VDC 1 Amp power supply, if a local power supply is required and not sourced
from the ACU.
The door unlock output (RA2/OC) is defaulted for 'fail safe'. If 'fail secure' is required on a WIEEX2 (firmware
6.00 or higher), connect RB4 on the receiver to the 'normally closed' position on the ACU lock relay.
The WIEEX2 transmitter (TX) can control a lock device or relay to a maximum of 12 VDC, 500 mA.
Keyscan Inc. – Technical Guide (PC109x - 04.15) 121