USD 263.89
Analog threshold switch with configurable DO and relay output, 24 VDC supply, 3-way isolation, 6 mm DIN-rail housing.
Analog threshold switch with configurable DO and relay output, 24 VDC supply, 3-way isolation, 6 mm DIN-rail housing.
| Parameter | Value |
|---|---|
| Item number | 857-531 |
| Input signal type | Voltage; Current |
| Input signal (voltage) | ±10 V; 0 … 30 V |
| Input signal (current) | ±20 mA |
| Input resistance (current input) | ≤ 200 Ω |
| Input resistance (voltage input) | ≥ 100 kΩ |
| Input current (max.) | 22 mA |
| Input voltage (max.) | 31 V |
| Switching voltage (DO) max. | Supply voltage applied |
| Continuous current (DO) max. | 100 mA (no internal restriction) |
| Number of switching thresholds (DO) | 2 (adjustable) |
| Number of changeover/switchover contacts | 1 |
| Switching Voltage, Max. | 250 VAC |
| Switching power (resistive) max. | AC 1500 VA; DC (see load limit curve) |
| Drop-out time (typ.) | 4 ms |
| Number of switching thresholds (relay) | 1 or 2 (adjustable) |
| Configurable rise/fall delay time (relay) | 0 … 30 s (via software) |
| Continuous current (max.) | 6 A |
| Hysteresis | Adjustable via DIP switch or software (valid for relays and DO) |
| Step response (typ.) | 16 ms |
| Transmission error (typ.) | ≤ 0.1 % of upper-range value |
| Temperature coefficient | ≤ 0.01 %/K |
| Power supply type | 24 VDC (SELV) |
| Nominal supply voltage US | 24 VDC |
| Supply voltage range | ±30 % |
| Current consumption at nominal supply voltage | ≤ 25 mA (+ I_DO) |
| Rated Voltage | 300 V |
| Protection type | IP20 |
| Test voltage (input/relay output/supply) | 3 kVAC; 50 Hz; 1 min |
| Overvoltage category | II |
| Pollution degree | 2 |
| Connection technology | Push-in CAGE CLAMP® |
| Solid conductor | 0.08 … 2.5 mm² / 28 … 14 AWG |
| Fine-stranded conductor | 0.34 … 2.5 mm² / 22 … 14 AWG |
| Strip length | 9 … 10 mm / 0.35 … 0.39 inches |
| Width | 6 mm / 0.236 inches |
| Height | 94 mm / 3.701 inches |
| Depth from upper-edge of DIN-rail | 97.8 mm / 3.85 inches |
| Mounting type | DIN-35 rail |
| Insulation material (main housing) | Polyamide (PA66) |
| Flammability class per UL94 | V0 |
| Fire load | 0.518 MJ |
| Weight | 38.6 g |
| Ambient temperature (operation) | -25 … +70 °C |
| Ambient temperature (storage) | -40 … +85 °C |
| Relative humidity | 5 … 85 % (no condensation permissible) |
| Operating altitude (max.) | 2000 m |
| Conformity marking | CE |
| Standards/specifications | EN 61373 |
| GTIN | 4066966662375 |
| Physical Weight (kg) | 0.04 |
| Dimensions L x W x H (cm) | 9.78 x 0.6 x 9.4 |
Use in process skids to detect when a sensor signal exceeds or falls outside a set band and trigger a relay or digital alarm output.
Replaces external comparators and provides direct threshold-based alarm signaling from standard analog signals.
Integrates into control panels to monitor analog transducer signals such as pressure, level, or temperature transmitters and switch outputs when limits are crossed.
Converts analog limit violations into discrete control actions for shutdown, warning, or interlock logic.
Suitable for railway or harsh industrial auxiliary panels where isolated threshold switching is needed with EMC immunity and 3 kV isolation.
Provides galvanically isolated threshold switching with documented EMC and EN 61373 suitability.
