RM35TM50MW

Configured for three-phase motor monitoring and PTC temperature protection, the Schneider Electric RM35TM50MW (RM35TM motor temperature control relay) provides direct electrical monitoring of phase sequence, phase failure, and motor temperature through a PTC sensing circuit. The relay provides two normally open output contacts for hard-wired control logic.

Hardware Specifications

Parameter	Specification
Model	RM35TM50MW
Brand	Schneider Electric
Product Series	Harmony Control Relays
Product Type	Motor temperature control relay
Application	3-phase supply
Monitored Parameters	Phase sequence, phase failure, motor temperature via PTC probe
Control Circuit Voltage	24...240 V AC/DC
Rated Supply Voltage	24...240 V AC/DC, 50/60 Hz
Supply Voltage Limits	20.4...264 V AC; 20.4...264 V DC
Measurement Range	208...480 V AC; 15...3100 Ohm
Measurement Voltage Limits	176...528 V AC
Output Contacts	2 NO
Nominal Output Current	5 A
Maximum Switching Voltage	250 V AC
Switching Capacity	1250 VA
Maximum Switching Current	5 A AC; 5 A DC
Minimum Switching Current	10 mA at 5 V DC
Electrical Durability	100000 cycles
Mechanical Durability	30000000 cycles
PTC Tripping Threshold	3100 Ohm +/- 10%
PTC Reset Threshold	1650 Ohm +/- 10%
Maximum PTC Sensor Resistance	1500 Ohm at 20 deg C
Reset Time	10000 ms output
Response Time	> 50 ms
Power Consumption	0...4 VA at 24...240 V AC; 0.5 W DC
Operating Temperature	-20...50 deg C
Storage Temperature	-40...70 deg C
Relative Humidity	95% at 55 deg C
Protection Rating	IP20 terminals; IP30 casing
Dielectric Test Voltage	2 kV, 1 min AC 50 Hz
Insulation Resistance	> 500 MOhm at 500 V DC
Rated Insulation Voltage	400 V
Mounting	35 mm symmetrical DIN rail, IEC 60715
Dimensions	35 mm W x 90 mm H x 72 mm D
Weight	0.095 kg
Terminals	Screw terminals
Tightening Torque	0.6...1 N.m
Housing Material	Polycarbonate
Standards	IEC 60255-6; IEC 60034-11-2
Certifications	GL, UL, GOST, C-Tick, CSA
Environmental EMC	IEC 61000-6-2, IEC 61000-6-3, IEC 61000-6-4

Phase Monitoring and PTC Temperature Control

The RM35TM50MW monitors a 3-phase supply for phase sequence and phase failure while separately evaluating motor temperature through a PTC probe connected to the temperature control circuit. The temperature circuit trips at 3100 Ohm +/- 10% and resets at 1650 Ohm +/- 10%.

The two output contacts are normally open and are rated at 5 A. The relay does not include a test button. Local status indication is provided by LEDs for power, phase relay status, and temperature relay status.

The non-self-powered supply accepts 24...240 V AC/DC. The modular housing mounts on a 35 mm symmetrical DIN rail and provides screw-terminal connections for the supply, monitored circuits, PTC input, and relay outputs.

Frequently Asked Questions

Q: What type of temperature sensor does the RM35TM50MW monitor?
A: It monitors a motor PTC probe through the T1-T2 temperature control circuit. The specified tripping threshold is 3100 Ohm +/- 10%, with a reset threshold of 1650 Ohm +/- 10%.

Q: What are the output contact ratings?
A: The relay provides 2 normally open contacts. The nominal output current is 5 A, with a maximum switching voltage of 250 V AC and a maximum switching current of 5 A AC or 5 A DC.

Q: What mounting arrangement is specified for the relay?
A: The relay is designed for mounting on a 35 mm symmetrical DIN rail conforming to IEC 60715. The housing can operate in any position without derating.

Field Installation Guidelines

• Mount the relay on a 35 mm symmetrical DIN rail with sufficient clearance for terminal wiring and access to the front adjustment elements.
• Verify the three-phase supply connections and phase-monitoring circuit before energizing the relay.
• Route PTC sensor wiring separately from high-current motor conductors where practical to reduce electrical interference.
• Maintain correct polarity and terminal identification for the PTC circuit according to the applicable wiring diagram.
• Connect protective and control wiring according to the installation documentation and the required control circuit architecture.
• Tighten screw terminals within the specified 0.6...1 N.m range.
• Verify that connected relay loads remain within the 5 A output rating and the applicable switching capacity.
• Check the enclosure and terminal protection requirements before installation in environments with conductive contamination or elevated humidity.
• Confirm phase sequence, phase-failure response, and PTC trip/reset operation during commissioning.
• Do not apply a supply voltage outside the specified 20.4...264 V AC/DC range.

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