Table 1 - Cable Requirements - Keyscan CA250 Series Technical Manual

Cables
The following table outlines system cable requirements. Please be sure to review grounding guidelines for safe
system operation. Avoid running access control cables parallel with AC wires or across fluorescent light fixtures.
This can cause AC induction or transmission interference.
Device / Circuit Board
Readers to ACU
(includes HID iClass – Rev B
& Rev C)
Exception Readers to ACU –
PX-620, HID-5375, MR-10,
MR-20, HID-iClass (Rev A),
iClass KEYRK40 and elevator
readers
Door Strikes & Electro
Magnets to ACU
Contacts & Exit Devices
Motion Sensors (PIR)
CB-485
CB-485M
CPB-10-2 (9600 baud)
Not recommended for use
with Rev. 11 or newer
boards.
CPB-10-2 (19200 baud)
Not recommended for use
with Rev. 11 or newer
boards.
ACU/PC/Modem/CB-485/
NETCOM/CPB-10-2
COMMEX Extender Kit (PC
Extender)
Keyscan Technical Guide (PC109x - 04.12)
Table 1 – Cable Requirements
Signal Maximum
Protocol Distance
Wiegand 500 ft
152.4 m
Wiegand 500 ft
152.4 m
n/a 500 ft
152.4 m
n/a 500 ft
152.4 m
n/a 500 ft
152.4 m
RS-485 2000 ft
609 m
RS-485 2000 ft
609 m
EIA/TIA- 2000 ft
562
609 m
(between
units)
EIA/TIA- 200 ft
562
61 m
Maximum
between units
and overall
distance.
RS-232 100 ft
30 m
(@ 9600 BPS)
n/a 4000 ft
1219.2 m
Cable Type Notes
6 conductors shielded Overall shielded cable
22 AWG (May require 2 accepted. CAT5 cable not
additional conductors acceptable with Wiegand signal
for external pre-alert protocol.
device)
6 conductors shielded Overall shielded cable
18 AWG accepted. CAT5 cable not
acceptable with Wiegand signal
protocol.
1 pair 18 AWG Shielded wire not required.
1 pair 22 AWG Shielded wire not required.
2 pairs 22 AWG Shielded wire not required
CAT 5 – 2 twisted pairs Maximum distance @ 9600 BPS
between units - as baud rates
increase, cable distances
decrease
Maximum baud rate is 57.6K
BPS
CAT 5 – 3 twisted pairs Maximum distance @ 9600 BPS
between units - as baud rates
increase, cable distances
decrease
Maximum baud rate is 19.2K
BPS
4 conductors 22 AWG Overall shielded cable
shielded accepted. CAT 5 cable not
acceptable with EIA/TIA-562
signal protocol. Overall
maximum is 4000 ft (1219.2
m)
4 conductors 22 AWG Overall shielded cable
shielded accepted. CAT 5 cable not
acceptable with EIA/TIA-562
signal protocol.
5 conductors 22 AWG Overall shielded cable
shielded accepted. CAT 5 cable not
acceptable with RS-232 signal
protocol.
CAT 5 - 2 twisted pairs Shielded wire not required. Kit
communication includes 1 transmitter & 1
receiver.
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