Johnson Controls CKM-MR51E Hardware Installation Manual page 10

CKM-MR51E
24-10707-58 Rev. E
Input Circuit Wiring
Typically, these inputs are used to monitor door position, request to exit,
or alarm contacts. Input circuits can be configured as unsupervised or
supervised. When unsupervised, reporting consists of only the open or
closed states.
When request to exit (REX) input is supervised, the strike remains locked
when a transition to open state or short state occurs. Such transitions do
not generate notifications. The strike relay unlocks only when the REX
input changes to the active state, that is, when the REX switch contact
opens or closes depending on the configuration.
When configured as supervised, the input circuit reports not only open
and closed, but also open circuit, shorted, grounded, and foreign voltage.
A supervised input circuit requires two resistors be added to the circuit to
facilitate proper reporting. The standard supervised circuit requires 1K
Ohm, 1% resistors and should be located as close to the sensor as
possible. Custom end of line (EOL) resistances may be configured via the
host software.
N : Grounded and foreign voltage states are not a requirement of UL 294
OTE
and therefore not verified by UL.
The input circuit wiring configurations shown in
but may not be typical.
}
IN1
IN2
IN3
IN4
1K,1%
1K,1%
1K,1%
1K,1%
Figure 7: CKM-MR51E Input Circuit Wiring
6
Hardware Installation Manual
Figure 7
Standard Supervised Circuit,
Normally Open Contact
Standard Supervised Circuit,
Normally Closed Contact
Unsupervised Circuit,
Normally Closed Contact
Unsupervised Circuit,
Normally Open Contact
are supported,