Installation Guide, Document 5
Communication Wiring
The PW7K1R1 communicates to a Honeywell Security intelligent controller
(EP2500 for example) via a half-duplex multi-drop 2-wire RS-485 interface. The
total cable length is limited to 4,000 feet (1,219 meters). Shielded cable of 24 AWG
with characteristic impedance of 120 ohm is specified for the 2- wire RS-485 inter-
face. The device on each end of the communication line should have the termina-
tor installed (install jumper J1 of the PW7K1R1)
.
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