Temperature Controllers
TH4M DIN Rail Multi-Channel PID Temperature Controller with RS485 Modbus
TH4M series is a DIN rail mounted multi-channel measurement and control instrument designed for industrial temperature monitoring and control systems. It supports 2-channel or 4-channel input, multiple thermocouple and RTD sensors, PID auto-tuning control, ON/OFF control, relay or SSR output, and RS485 Modbus communication.
- 2-channel and 4-channel models available
- Supports thermocouple and RTD temperature inputs
- RS485 communication with Modbus protocol
- PID auto-tuning and ON/OFF control modes
- Relay output, SSR output, or current/SSR drive output optional
- Heating and cooling control available
- Upper and lower limit alarm function
- Compact DIN35 rail mounting for control cabinets
- Lead time
- 3–5 working days
- Warranty
- 12 months
- OEM
- Supported
- Shipping
- Worldwide export
Technical specifications
| Series | TH4M Series modular DIN-rail multi-channel controller |
|---|---|
| Channels | 2 or 4 independent loops (code 2 / 4) |
| Architecture | Basic module (B) + expansion module (E) |
| Control method | PID auto-tuning and ON/OFF control |
| Input | Thermocouple K, S, R, E, J, T, B, N and WRe3-WRe25 / WRe5-WRe26; RTD Pt100, Cu50 |
| Input ranges | K -200 to 1300°C; S/R -50 to 1700°C; T -200 to 350°C; E 0 to 800°C; J 0 to 1000°C; B 200 to 1800°C; N 0 to 1300°C; WRe 0 to 2300°C; Pt100 -200 to 800°C |
| Control output | R relay; S SSR drive; C current or SSR option |
| Alarm output | 2 = AL1/AL2; 4 = AL1–AL4; N = none; independent upper, lower and deviation alarms |
| Communication | RS485 Modbus; baud rate 1200–38400 bps (default 9600 bps) |
| Supply voltage | 100–240VAC (code 2) or 24VDC (code D) |
| Accuracy class | 0.15 / 0.2 / 0.25 / 0.3 |
| Temperature drift | <0.01% FS/°C, typical 60ppm/°C |
| Control cycle | 0.48s |
| Display resolution | 0.1°C / 1°C selectable |
| EMC | IEC 61000-4-4 and IEC 61000-4-5, 6kV |
| Operating environment | -10 to 60°C; <90% RH |
| Mounting | DIN35 rail mounting |
| Dimensions / panel cutout | DIN rail module — no panel cutout; module dimensions to be confirmed before ordering. |
| Terminal / wiring diagram | To be confirmed before ordering. |
Product photos
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