SR335

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Alarm Unit with Pt100 Input and Double Relay Outputs

SR335 is designed for industrial temperature monitoring with Pt100 sensors
in 2- or 3-wire connection.
Two output relays with individually adjustable trip functions are available.
LED’s in the front indicate alarm state and correct power supply.

  • Input from Pt100 sensors in 2- or 3-wire connection
  • Selectable, pre-calibrated temperature ranges
  • Two relay outputs with independent switch functions
  • Monostable relays for safe tripping at power failure
  • SPDT relays with 6 A switch capacity
  • High configuration flexibility with DIP switches
  • Trip levels and hysteresis adjustable from the front
  • Three front LED’s for trip indication and power supply monitoring
  • 4 kV isolation between input, output and power supply
  • Protective Separation acc. to EN 50178
  • Universal 24 V AC and DC power supply
  • DIN-rail mounting

Teknisk Specifikation

Technical Specification

Input
Sensor Pt100, Pt200, Pt500 and Pt1000 (switch selectable)
Measuring range Zero: -100 / -50 / 0 / +50 °C (switch selectable) Span: 100 / 200 / 300 / 400°C (switch selectable)
Sensor connection 2-wire and 3-wire (switch selectable)
Output, Relay 1 & 2
Relay contacts 1-pole switch over contact (SPDT)
Contact rating 250 VAC/DC, 6 A, 1 500 VA
Relay function Monostable, Normally active or passive (switch selectable)
Alarm functions, relay 1 High/Low alarm (switch selectable)
Alarm functions, relay 2 High/Low alarm or Power failure alarm (switch selectable)
Alarm indication Alarm state indicated by yellow LED
Svarstid Ca. 20 ms (fast)
Operation temperature -20 to +60 °C / -4 to +140 °F
Galvanic isolation
Input / power supply / relay outputs 4 kVAC, 1 min
Relay 1 / Relay 2 2,5 kVAC, 1 min
Power supply
Voltage 24 VAC/DC ±15 %, 48 to 62 Hz (AC supply)
Power consumption AC: ca. 2 VA, DC: ca. 1 W
Typical accuracy Trip point: ±0.2 % of span
Mounting Rail acc. to DIN EN 50022, 35 mm

 

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