Appendix “c” basic circuit types – Interlogix Monitor XL Hardware Guide User Manual
Page 61
22-0375 rev1.1
Monitor ISM/xL™ Hardware Guide
57
Appendix “C” Basic Circuit Types
Normally Closed
Normally Closed with 2.2 K End of Line Resistor
NC
NO
COM
3
1 2
Yellow
Black
CABLE
1
I
n
p
u
t
I
n
p
u
t
2
C
O
M
Yellow
Black
Black
Yellow
NC
NO
COM
Black
NC
NO
COM
Yellow
Black
Yellow
Yellow
Black
Junction
Single Device
Multiple Device
C
NO
NC
C
NO
NC
2.2 K
NC
NO
COM
3
1 2
Yellow
Black
CABLE
1
I
n
p
u
t
I
n
p
u
t
2
C
O
M
C
NO
NC
Yellow
Black
•
CAUTION: This circuit type supplies minimal supervision.
•
The end of line resistor, must always be placed at the Device, NOT at
the Alarm Input.
•
When the Contact is Open, the Control will see the 2.2K-ohm
resistor, which equals Alarm.
•
If the loop wiring is Open (loss of resistor), the System will indicate a
Tamper condition.
•
This Circuit Type cannot be used in a Multiple Device application.
•
Each device using this alarm loop must be connected to 1 Alarm
Input only.
Sample use:
Could be applied to a device alarm contact that would
ordinarily always be closed (e.g. a vibration detector). The 2.2K resistor is
not used. If the device is triggered in an off guard (unarmed) state and the
contact goes open, a tamper condition is transmitted because there is no
resistor. If the device is triggered in an on guard (armed) state, an alarm
condition is transmitted because there is no resistor.
Form "C" Single Resistor EOL
Normally Open with EOL
NC
NO
COM
3
1 2
Red
Black
CABLE
1
I
n
p
u
t
I
n
p
u
t
2
C
O
M
C
NO
NC
Red
Black
C
NO
NC
Red
Black
Black
Red
C
NO
NC
NC
NO
COM
NC
NO
COM
NC
NO
COM
2.2 K
2.2 K
Red
Black
Red
Black
Single Device
Multiple Device
•
A short on this Circuit Type equals Alarm.
•
A break or a ground in the wiring equals a Tamper.
•
Do not reverse the home run's common connection
at the contact, as this will also result in a Tamper
condition.
NC
NO
COM
3
1 2
Black
CABLE
1
I
n
p
u
t
I
n
p
u
t
2
C
O
M
C
NO
NO
C
NC
2.2 K
Black
Yellow
Black
Black
Yellow
Yellow
Yellow
Black
Junction
NC
NO
COM
NC
NO
COM
Red
Yellow
Green
2.2 K
NC
Single Device
Multiple Device
Yellow
Y
e
llo
w
•
A short on this Circuit Type equals Alarm.
•
A break or a ground in the wiring equals a Tamper.
Form "C" Dual Resistor EOL
2.2 K 2.2 K
NC
NO
COM
3
1 2
Yellow
Black
CABLE
1
I
n
p
u
t
I
n
p
u
t
2
C
O
M
Yellow
Black
C
NO
NC
•
This Circuit Type has 2 end of line resistors, each one 2.2K ohms.
•
When the Alarm Input is normal, the Control is looking at both resistors
(total resistance: 1.1K ohms).
•
When the Alarm Input is Open (not secure), the control will see 2.2 K
ohms.
•
There can only be 1 device on this alarm loop.