System power and data communication
Page 64 OmniTrax Product Guide
Local control mode
Local control mode default relay functions
The following table lists the relays and the self-test inputs, along with their default functions for
local control mode.
Fail-safe relay operation
In the default configuration, relays K1 (Fail) and K2 (Supervision) operate in fail-safe mode. During
normal operation, both relays latch in the non-alarm state. In the event of a DC input power failure,
the Fail relay changes to the alarm state. In the event of a DC input power failure, and there is no
battery installed, or the battery is not charged, or the battery discharges to a level below the
minimum threshold, the Supervision relay changes to the alarm state. Fail-safe operation is user-
selectable for each of the processor’s four relays.
Local control mode functions (self-test inputs)
In local control mode, the two AUX I/Ps on the OmniTrax processor are self-test inputs. When
there is a momentary switch input to an AUX input, the processor compares the current clutter
level to the recorded historic clutter level on the respective cable side (AUX1 = A side cable,
AUX2 = B side cable). If the current clutter level is within the Historic variance parameter (default =
12 dB) of the historic clutter level, the processor activates all relays that are assigned to the cable
side. AUX1 activates all relays that are assigned to Side A. AUX2 activates all relays that are
assigned to Side B. If the current clutter level deviates from the historic clutter level by more than
the Historic variance parameter, the relays do not activate (self-test fails).
For local control mode, the input wiring configuration must be unsupervised with NO contacts (a
momentary switch input). The Filter Window parameter (via the UCM) allows you to set the time
period for which an input must be active, before a self-test occurs.
Note A Silver Network based processor can use local control mode to
operate its output relays and Aux inputs.
Note Each processor communicating on the Silver Network, or via the sensor
cables, requires a Network Interface Card (NIC).
Relay K1 - Fail
internal processor hardware faults
internal processor software faults
internal communication failure
DC input power fail (regardless of battery state)
ADC input signal exceeds range
NOTE: The Fail relay activates for 5 seconds to indicate that the
processor has been powered up or reset.
Relay K2 - Supervision
sensor cable supervision
enclosure tamper
Aux 1 or Aux 2 supervision
DC input power fail (battery is not installed or is not charged)
Relay K3 - Alarm A
Sensor alarm (user configurable)
Relay K4 - Alarm B
Sensor alarm (user configurable)
Aux 1 - Self-test 1
closed = self-test A-side
Aux 2 - Self-test 2
closed = self-test B-side
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