Clary SP1250LX - Manual (Page 6)

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1.2 Operating Modes
Clary’s SP-LX Series Uninterruptible Power Systems (UPS) are designed for powering low power
(i.e., LED & NEON) traffic & pedestrian indications, plus critical traffic control devices (i.e.,
controllers, modems, CMU’s, etc.). The power system consists of three elements, which work
together to provide critical loads with continuous, conditioned, regulated, sinusoidal waveform
power that is free from disturbances such as spikes, surges, brownouts or blackouts. These
elements are the:
1. UPS Module – (UPS)
2. Bypass Box
3. Battery Module
Backup power is achieved with a set of rechargeable, SVRLA (sealed valve-regulated lead-acid),
maintenance-free, AGM (absorbed glass mat), batteries. The complete UPS system is controlled
by an onboard digital microprocessor at all times.
The UPS continuously generates 120V AC power to the equipment.
SP1250LX
The SP1250LX has an extended load option that will allow 1400 Watts peak load for ten seconds.
This option allows for support of intersections that have not yet replaced the yellow incandescent
traffic lamps.
Additional Notes on Operating Modes:
• The SP-LX Series Traffic UPS is designed for compatibility with, and complete
transparency to, all traffic signal cabinet functions including police panel operation.
RELAY CONTACTS:
The UPS includes eight (8) sets of normally-open (NO) and normally-closed (NC) relay style
contacts. The contacts are intended to connect to the Flash controllers or other devices in the
traffic cabinet. The contacts are actuated at various times as a means of signaling these devices
of important aspects of current operation. These relays can be programmed from the Front Panel
LCD Display. You can set any of the relays to a certain condition listed in Table 12. See section
4.10 for programming instructions.