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KMS Simplekey 4 - Between Cabinet Wiring

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Key Management Systems Ltd 29 | P a g e
Between Cabinet Wiring
The wiring guide below should be used where separate cabinets require the BUS
DATA wired. The same applies regardless of the number of cabinets. The use of a 12v
DC power supply is required in each separate cabinet to power all the local NODES.
M2S
1
1 core Green 0.2mm
2
- Wire to Green/White of Cat5
0V
2
1 core White 0.2mm
2
-- Wire to White/Green and White/Blue of
Cat5
12V
3
Not used
S2M
4
1 core Blue 0.2mm
2
- Wire to Blue/White of Cat5
0V
5
Not used
12V
6
Not used
Note: All spare cores on BUS cabling should be terminated to
ground.
Wiring diagrams for transmitting the BUS between cabinets can be found on pages 44 and 45.
Note: If there is a short on the BUS (M2S/S2M goes to ground) then
alarms are generated on all nodes - General Alarm for 60 seconds
followed by a Reminder Alarm (1 tone) every 5 seconds. Data loss to
Lock Controllers will result in automatic lock release (non-SBD), the
Lock Controller will flip the lock state i.e. Fail-Safe becomes Fail-
Secure, Fail-Secure becomes Fail-Safe. All egress buttons MUST be
wired to break lock supply.

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