System power and data communication
Page 60 OmniTrax Product Guide
System power and data communication
The OmniTrax processor operates on 12 to 48 VDC and consumes 9 W (nominal). Senstar offers
12 VDC local power supplies, and a 48 VDC network power supply for use with the OmniTrax
system.
OmniTrax alarm communication can be via relay contact outputs, or Senstar’s Silver Network (see
System power and data configurations
on page 66 for examples). For relay communications, you
make hard-wired connections between the processor and your annunciation equipment. The
processor includes 4 on-board relays for signaling alarm, supervision and fail conditions. The
optional Relay Output card (ROC) adds 8 additional relays for reporting alarm conditions.
Silver Network communications are via EIA-422 wiring, fiber optic cable, or over the OmniTrax
sensor cables (between processors). Each processor communicating on the Silver Network
requires a network interface card. The optional ROC adds 8 relay outputs, which are operated by
the host security management system. The optional Universal Input Card can be installed to
provide 8 additional inputs to the host system. With network communications, one or more
processors connect to a Network Interface Unit (NIU) via EIA-422 or fiber optic cable. The NIU
translates the alarm data and passes it on to the Windows-based Silver Network Manager (NM).
The NM interprets the alarm data and passes it on to a PC-based security management system
(e.g., Senstar’s Alarm Integration Module, or StarNeT 1000). Network communications enables
precise target location and software controlled alarm zone configuration.
Network data traffic passing between processors is retimed and retransmitted at full strength at
each node. The Silver Network communicates at a fixed baud rate of 57.6 k. With EIA-422
communications, the processors can be separated by a maximum distance of 1.2 km (0.75 miles).
Data-grade individually shielded twisted pair cable (2 pairs) should be used for EIA-422 data
paths. Using 62.5/125 multi-mode fiber optic cable, the separation distance can be increased to a
maximum of 2.2 km (1.35 miles). For the maximum separation distance of 10 km (6.3 miles), use
9/125 single mode fiber optic cable. For sensor cable communication, the sensor cables from one
processor are connected to the sensor cables from the next processor though decouplers, for a
maximum separation between processors of 800 m (0.5 miles). There are two types of decouplers
available. Network decouplers allow the data signals and power to flow from processor to
processor, while terminating the RF detection field. Standalone decouplers pass the data while
blocking the flow of DC power over the sensor cables. Standalone decouplers also terminate the
detection field.
System power
Note In locations where the AC power may not be stable or reliable, Senstar
recommends using an uninterruptible power supply (UPS) as the
primary power source.
Note DO NOT bring AC mains power into the OmniTrax enclosure. If a local
power supply is being used outdoors, it must be installed in its own
weatherproof enclosure. Consult the local electrical code for information
about the connection of AC mains to your power supply.
Note Senstar strongly recommends the use of a shielded power cable with
the shield connected to ground at only one end of the power cable.
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