Chapter 2
Installation
9
Note: The keypads ship with an updated I/O box that provides RJ45 ports for the RS-485 data line and an RJ11 port for audio.
See Connecting new and old I/O boxes on page 17 for connections between the new and old I/O boxes. For connection details
for the old I/O boxes, see Old I/O box connections on page 61.
Table 1. Recommended cable types
Signal Cable
1
1. Refer to the devices’ manuals for specific cabling requirements.
Minimum Size Length/Feet Length/Meters
RS-485 STP (shielded twisted-pair) 22 AWG 3,000 900
RS-422 UTP (unshielded twisted-pair) 22 AWG 10,000 3,000
Audio STP (shielded twisted-pair) 18 AWG 500 150
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