Manual

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)

• 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