0 cable requirements, 1 rs-232 serial cable, 2 rs-485 network cable – Keri Systems SB-293 User Manual
Page 19: 3 input power, 4 earth ground, Cable requirements
Keri Systems, Inc.
Technical Reference Manual – PXL-250 and SB-293
Revision 5.5
P/N: 01836-004
Page 19
4.0
Cable Requirements
4.1
RS-232 Serial Cable
•
four conductor, shielded, stranded, AWG 24 wire (such as Belden 9534 or a larger
gauge)
•
50 feet maximum length (per RS-232 industry specification)
4.2
RS-485 Network Cable
•
two conductor, shielded, twisted pair, stranded, AWG 24 wire (such as Belden
9501 or a larger gauge)
•
16,000 feet total network length
•
refer to the Network Wiring Application Note (P/N 01824-002) for specific
network wiring information
4.3
Input Power
•
two conductor, stranded, AWG 18 wire (such as Belden 8461 or a larger gauge)
•
200 feet maximum cable length for systems using an SB-293 with two readers
NOTE: On long power cable runs, the resistance in the cable itself causes a drop in
voltage at the end of the run. Be sure that your power supply does provide 12 VDC at
the end of the cable run.
4.4
Earth Ground
•
single conductor, AWG 18 wire (or a larger gauge)
1
1. Ground wire is green with or without yellow tracer.