M74Universal 4-channel PID temperature controller
Versatile inputs and flexible outputs for equipment-specific control.
SG-PID control
Super 2-degree-of-freedom PID with variable sampling
Universal 4-channel inputs
TC, RTD, voltage and current inputs
Fully isolated design
Isolation between inputs and between inputs and outputs
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Features
M74 FeaturesA compact design and full isolation provide high reliability and efficient use of space. The detachable body and base and expansion connectors simplify maintenance and module configuration. M74 MASTER supports convenient parameter setup and integrated management.
Compact construction
At approximately 70% of the volume of competing products, M74 helps make efficient use of control-panel space.
Detachable body and base with module expansion
The detachable body and base allow convenient maintenance without switching off power during operation. Expansion connectors reduce communication and power wiring between modules.
Simple key operation
Features an industry-first key for electronic station number checking and communication parameter setup.
Universal I/O
Supports TC, RTD, voltage and current inputs, with SSR (voltage pulse) and SCR (current) outputs. Relay outputs can be added using an M74R module.
Configurable output ports and functions
Configure output ports for retransmission output and simultaneous heating/cooling control.
User-defined register map
Arrange monitoring and setting registers in the required order to reduce communication frames with a PLC or other host and streamline data processing.
Fully isolated design
A fully isolated design separates the inputs and outputs. The specified terminal pairs are rated for a dielectric strength test of 1,000 V AC for 1 minute.
Long-life parameter storage
Stores parameter settings in EEPROM rated for at least 4 million writes and 200 years of data retention.
Fully isolated RS-485 communication
Supports 9,600~115,200 bps and Modbus ASCII/RTU, PC-Link and TL-Link.
Temperature recording and integrated management
M74 MASTER remote monitoring and data viewer software is included as standard for convenient parameter setup, recording and integrated management.
Invention patent 10-2275000 · Catalog listing: patent application 30-2021-0011391 and three others
Specifications
View Catalog PDF| General | |
|---|---|
| Model | M74 |
| Number of channels | 4-channel control I/O |
| Supply voltage | 24 V DC, Class 2 |
| Allowable voltage range | 90–110% of rated supply voltage |
| Power consumption | 5 W max. (at maximum load) |
| Display & operation | No built-in display. Configure parameters and monitor/control via an external console, touch panel, PC or PLC. |
| Dimensions | 29(W) × 90(H) × 70(D) mm |
| Inputs and measurement | |
| Thermocouple (TC) | K(CA), J(IC), E(CR), T(CC), R(PR), B(PR), S(PR), L(IC), N(NN), U(CC), C(W5), D(W3) |
| Resistance temperature detector (RTD) | KPt100(KS), JPt100(JIS), Pt100(DIN) |
| RTD allowable lead resistance | 10 Ω max. / for 3-wire connections with equal lead resistance |
| Analog voltage input | 0~5 V, 1~5 V, 0~10 V, 0~100 mV, −10~20 mV / adjustable within the input range |
| Analog current input | 4~20 mA |
| Sampling period | 50 ms minimum / simultaneous 4-channel control with variable sampling |
| Measurement accuracy | ±0.3% of FS + 1 digit |
| Control and outputs | |
| Retransmission output | RET 4~20 mA DC / load resistance: 500 Ω max. / effective resolution: 1/6000 |
| Control output · SSR | 12 V DC, 25 mA voltage pulse / built-in short-circuit protection / time-proportional PID or ON/OFF output |
| Control output · SCR | 4~20 mA or 0~20 mA DC / load resistance: 500 Ω max. |
| Control methods | Heating, cooling and simultaneous heating/cooling / ON/OFF, P, PI, PID (Super 2-degree-of-freedom) |
| Proportional band (P) | 0.1~999.9 °C (temperature input) / 0.1~999.9 digit (analog input) |
| Integral time (I) | 0~3600 s |
| Derivative time (D) | 0~3600 s |
| Control output cycle (Ct) | SSR mode: 0.1~100 s / relay mode: 1~100 s |
| Communication | |
| Host communication | Modbus ASCII/RTU, PC-Link or TL-Link / 9,600~115,200 bps |
| PC Loader communication | Console (dedicated display controller) / USB interface cable (optional) |
| Insulation, Reliability & Environment | |
| EEPROM endurance & retention | At least 4 million write cycles / At least 200 years of data retention |
| Insulation resistance | 100 MΩ min. (500 V DC insulation tester) |
| Insulation construction | Double or reinforced insulation / Dielectric strength of at least 1 kV between measurement input and power supply |
| Dielectric strength | 1,000 V AC, 50/60 Hz, for 1 minute — between input terminals, input and output terminals, and input and power terminals |
| Vibration resistance | 5–55 Hz (1-minute cycle), 0.75 mm double amplitude / 2 hours each in X, Y and Z directions |
| Noise immunity | Noise simulator square wave, 1 μs pulse width / ±1 kV |
| Ambient temperature | Operating: −10 to 50 °C / Storage: −20 to 60 °C |
| Ambient humidity | Operating: 35–85% RH / Storage: 35–85% RH |
| Weight | Approx. 230 g with packaging / Approx. 120 g net |
Dimensions & Wiring
Enlarge drawings · Original vector PDF available for dimensionsDimensions and detachable body/base
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