DatasheetSR235
Temperature monitoring relay for Pt100 sensors
| Type | Temperature monitoring relay for industrial temperature monitoring with Pt100 sensors |
|---|---|
| Sensor connection | Pt100 sensors in 2- or 3-wire connection |
| Output | 2 output relays with independently adjustable trip functions |
| Relay function | Monostable relays for safe tripping in case of power failure |
| Relay contact | SPDT relay with 6 A switching capacity |
| Configuration | High configuration flexibility via DIP switches |
| Setting | Trip point and hysteresis adjustable on the front |
| Display | 3 front LEDs for trip and supply voltage monitoring |
| Insulation | 4 kV insulation between input, output and supply voltage |
| Protection | Protective separation according to EN 50178 |
| Auxiliary supply | Universal 24 V AC/DC supply voltage |
| Mounting | DIN rail mounting |
| Sensor | Pt100, Pt200, Pt500 and Pt1000, selectable by switch |
| Standard | IEC 60751, α = 0.00385 |
| Measuring range | Zero point -100 / -50 / 0 / +50 °C, selectable by switch; span 100 / 200 / 300 / 400 °C, selectable by switch |
| Sensor connection | 2-wire and 3-wire connection, selectable by switch |
| Sensor lead resistance | ≤ 10 Ω per lead |
| Relay contact output 1 & 2 | Single-pole changeover contact, SPDT |
| Contact | 250 VAC/DC, 6 A, 1500 VA |
| Relay function | Monostable, normally active or passive, selectable by switch |
| Alarm function relay 1 | High/low alarm, selectable by switch |
| Alarm function relay 2 | High/low alarm or power failure alarm, selectable by switch |
| Alarm indication | Alarm status indication via yellow LED |
| Adjustable alarm set point | 0 to 100 % of input range, front potentiometer |
| Adjustable hysteresis | 0 to 60 % of span, front potentiometer |
| Response time | Approx. 20 ms, fixed |
| Operating temperature | -20 to +60 °C / -4 to +140 °F |
| Galvanic isolation | 4 kVAC, 1 min between input / supply voltage / relay outputs |
| Relay 1 / relay 2 | 2.5 kVAC, 1 min |
| Supply voltage | 24 VAC/DC ±15 %, 48 to 62 Hz with AC supply |
| Power consumption | AC approx. 2 VA, DC approx. 1 W |
| Typical accuracy | Trip point ±0.2 % of span |
| Mounting | Rail according to DIN EN 50022, 35 mm |
