Keri Systems SB-293 - Manual (Page 20)

Technical Reference Manual – PXL-250 and SB-293 Keri Systems, Inc.
Page 20 P/N: 01836-004 Revision 5.5
4.5 Keri Systems Proximity Readers
• six conductor, shielded, stranded, AWG 24 wire (such as Belden 9536 or a larger
gauge)
1
• maximum cable lengths by wire gauge are defined in Table 2
4.6 Wiegand Compatible Devices
• five, six, or seven conductor, shielded, stranded, wire (depending upon the type of
Wiegand device)
NOTE: A minimum gauge of AWG 24 is required for data transfer with a 500-foot
maximum run length per Wiegand specification. However, the wire gauge to use
should be determined by the current draw requirements of the Wiegand device and the
actual length of the cable run. A +5 VDC Wiegand device must have +5 VDC at the
device (long cable runs have a voltage drop across the length of the run due to the
resistance in the cable). To ensure +5 VDC is available at the device a larger gauge of
wire (having less resistance) or a separate power supply at the Wiegand device may be
required.
4.7 Input and Output Connections
• two conductor, stranded, AWG 22 or a larger gauge
NOTE: The Lock Output relay may require a heavier gauge of wire depending upon
the current demands of the lock and the length of the lock wiring run.
NOTE: If plenum cable is required, please reference the Belden plenum equivalent to
the cables listed above.
1. The MS-4000 requires only four conductors as it does not have a beeper or LED.
Table 2: Maximum Cable Lengths by Wire Gauge for Keri Systems
Proximity Readers
Maximum Cable Length by Wire Gauge
Reader Type 100 ft 250 ft 500 ft
MS-3000 AWG 24 AWG 24 AWG 24
MS-4000 AWG 24 AWG 24 AWG 24
MS-5000 AWG 24 AWG 24 AWG 24
MS-7000 AWG 24 AWG 24 AWG 20
MS-9000 AWG 24 AWG 22 AWG 18