RBH Access Technologies UNC100 - Page 32

UNC100 Hardware Manual V1.4 RBH Access Technologies Inc.
Page 32 of 36
Normally Open, Two Resistor
Loop Resistance
State
Short
Trouble
1k
Alarm
2k
Restore
Open Circuit
Trouble
Normally Open And Normally
Closed, One Resistor
Loop Resistance
State
Short
Alarm
1k
Restore
Open Circuit
Alarm
This circuit type is used where normally open and normally closed contacts are used in the same loop.