Schneider Electric RM84 Harmony Control Relay
Schneider Electric RM84 Harmony Control Relay offers liquid-level monitoring via resistive probes, 3VA power consumption, and a 1.5"-wide package. This plug-in industrial measurement and control relay detects the level of conductive liquids and switches its relay output based on the detected condition. The adjustable sensitivity range is ideal for liquids with different resistance characteristics. The RM84870301 relay applies a low AC voltage to the electrodes and provides separate response times for high- and low-level detection. Electrical isolation separates the contacts and electrodes from the power supply. Schneider Electric RM84 Harmony Control Relay features an 8-pin construction, 24VAC supply voltage, and a changeover relay output. The device has CSA and cULus certifications and is suitable for liquid level control applications operating from -20°C to +60°C.
Features
- Conductive liquid level detection using resistive probes
- Adjustable sensitivity for various liquid resistance levels
- High- and low-level detection
- Plug-in construction with 8 pins
- Changeover relay output
- AC electrode excitation
- Electrical isolation between contacts, electrodes, and supply
- CSA and cULus certifications
Applications
- Conductive liquid level monitoring
- High-level liquid detection
- Low-level liquid detection
- Tank filling control
- Tank draining control
- Industrial liquid management systems
Specifications
- 1.5" (39mm) width
- 24VAC supply voltage
- 3VA power consumption
- 5kΩ to 100kΩ sensitivity range
- 24VAC maximum electrode voltage at 50Hz or 60Hz
- 1mA maximum electrode current at 50Hz or 60Hz
- 300ms high-level response time
- 500ms low-level response time
- 2500VAC isolation voltage between contacts and electrodes from supply
- -20°C to +60°C operating temperature range (ambient air)
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