Double end of line (DEOL) resistors
When double end-of-line (DEOL) resistors are installed at the end of a zone loop, the second resistor enables the panel to determine
if the zone is in open, closed, tampered or faulted.
Note:
Any zone programmed for Fire or 24-hr Supervisory must be wired with a SEOL resistor regardless of the type of zone wiring
supervision selected for the panel. If you change the zone supervision options from DEOL to SEOL or from NC to DEOL, power the
system down completely, then power it back up for correct operation.To enable DEOL supervision per zone, program section [013],
option [1] to OFF and option [2] to ON. To configure DEOL supervision per zone, use programming section [002], attribute 11.
Figure 3-1: DEOL wiring
Callout
Description
1
Any Z terminal
2
Any COM terminal
3
5600 Ω end of line resistor
4
Normally closed contact
Note:
If the DEOL supervision option is enabled, all hardwired zones must be wired for DEOL resistors, except for Fire and 24 Hour
Supervisory zones. Do not use DEOL resistors for Fire zones or 24 Hour Supervisory zones.
Note:
Do not wire Fire zones to keypad zone terminals if the DEOL supervision option is selected.
Note:
This option can only be selected if N/C detection devices or contacts are used. Only one N/C contact can be connected to each
zone.
The following table shows zone status under certain conditions for DEOL:
Table 3-1: DEOL loop status
Loop resistance
Loop status
0 Ω (shorted wire, loop shorted)
Fault
5600 Ω (contact closed)
Secure
Infinite (broken wire, loop open)
Tamper
11200 Ω (contact open)
Alarm
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