UNC100 Hardware Manual V1.4
RBH Access Technologies Inc.
Page
31
of
36
Normally Open, No Resistor
Loop Resistance
State
Short
Alarm
Open Circuit
Restore
Normally Closed, One Resistor
Loop Resistance
State
Short
Trouble
1k
Restore
Open Circuit
Alarm
Normally Closed, Two Resistor
Loop Resistance
State
Short
Trouble
1k
Restore
2k
Alarm
Open Circuit
Trouble
This circuit provides a high degree of supervision and detects both short and open circuit fault conditions.
Use this circuit in high security applications.
Normally Open, One Resistor
Loop Resistance
State
Short
Alarm
1k
Restore
Open Circuit
Trouble