Model 908
Over-Temperature Detector
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Fleet Discounts Available |
GENERAL OVERVIEW:
The 908 Over-Temperature Detector can be used to monitor Exhaust Gas, Turbocharger Inlet, Coolant or Temperature.
When the trip point has been reached, a relay internal to the module becomes energized (failsafe). The Relay is a SPST, (10 Amp Max.) with all contacts brought out to the user.
FEATURES & OPERATION:
The Over-Temperature Detector (908) is designed to operate from a 24V DC power, but will accommodate supply voltage as low as 15V DC, and as high as 28V DC.
The engine is monitored by a remote temperature sensor whose output is compared inside the Module (908) electronics to a trip point, user adjustable from 60°C to 180°C. The trip point adjustment pot is accessible by removing the endplate without the barrier strip, and setting the trip temperature with a small screwdriver.
There is one Pre-Alarm temperature trip point per-channel. If the temperature falls below the trip point setting, the channel indicator (LED) will be off, and the internal relay will energize, closing relay contact terminals 4 and 6 (with 5 open).
When the temperature increases within approx. 2°F of the trip point, the appropriate channel indicator starts to flash. Flashing continues until the temperature falls back below the pre-alarm reset point (indicator off). If the temperature continues to increase to the trip point, the channel indicator (LED) turn on steady (indicating a trip) and the Relay is de-energized, closing contacts 4 and 5 (with 6 open).
The enclosure is Extruded Aluminum with Mounting Flanges, with 0.060 Aluminum Covers.
Internal adjustments with temperatures dials are provided for setting temperature trip points. These are factory set, but may be field adjusted to suit each application.
There is no connection from the Case to the PC Board (Isolated). |
