Flowserve TRS 5-8 - Manual (Page 8)

8
Function
The temperature switch TRS 5-8 is a two-channel temperature monitoring system
used in conjunction with a standardized platinum resistance thermometer Pt 100 in
accordance with DIN IEC 751. A power source fitted with a variable resistor supplies
the resistance thermometer with a constant current. The desired cut-off
temperatures are adjusted by means of an eight-pole code switch. To ensure a fail-
safe alarm signal as soon as the temperature exceeds the max. limit the output
contact relays of the TRS 5-8 are of the normally closed type.
In the event of a power supply failure the temperature switch will signal an alarm
condition.
The temperature switch is designed for two operating conditions:
■ Normal operation (temperature within admissible range)
■ Alarm (temperature above/below limit)
The green LED indicates power supply. The two red LEDs indicate alarm when the
temperature exceeds the adjusted limit.
Description
The
MAX
/
MIN
temperature switch TRS 5-8 used in conjunction with resistance
thermometer TRG 5-53, TRG 5-54, TRG 5-55, TRG 5-56, TRG 5-57, TRG 5-58 is a
temperature controller in accordance with DIN 3440.
When the actual value exceeds the adjusted limit the equipment will trigger an alarm.
Application in steam boilers, pressurized hot-water plants operating without constant
supervision (TRD 604) as well as any other kind of heat generating unit.
Design
TRS 5-8 b:
Plug-in unit in plastic case for snapping onto the supporting rail TS 35 x 15 to DIN
EN 50022 for installation in control cabinets.
Explanatory Notes
Scope of supply
TRS 5-8 b
1 Temperature switch (plug-in unit in plastic case for installation in control
cabinets)
1 Installation manual