GE KTD-405 User Manual page 13

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
for the old I/O boxes, see
Table 1. Recommended cable types
Signal Cable
1
RS-485 STP (shielded twisted-pair)
RS-422 UTP (unshielded twisted-pair)
Audio STP (shielded twisted-pair)
1. Refer to the devices' manuals for specific cabling requirements.
on page 17 for connections between the new and old I/O boxes. For connection details
Old I/O box connections on page 61.
Minimum Size Length/Feet
22 AWG 3,000
22 AWG 10,000
18 AWG 500
Chapter 2 9
Installation
Length/Meters
900
3,000
150