Product Overview

The TTM-004W-R-A, part of TOHO’s TTM-000W series, is a compact, panel-mount digital temperature controller designed for industrial temperature regulation with precision and flexibility. It supports a broad range of sensor inputs (thermocouples and RTDs) and offers features such as self-tuning PID control, multiple alarm outputs, and robust environmental protection. DigiKey

Key Specifications & Features

• Input Types Supported: Thermocouples (B, J, K, N, R, S, T) and 3-wire RTDs (e.g. Pt100) DigiKey+1

• Control Outputs: Two relay outputs (relay1 and optional alarm/relay2) DigiKey

• Control Modes: ON/OFF control or PID (with automatic tuning) DigiKey+1

• Power Supply: 100–240 VAC DigiKey

• Display & Interface: Dual-color LED display showing Process Value (PV) and Set Value (SV); front-panel keys (▲ / ▼ / MODE / FUNC) for navigating menus and adjusting settings

• Environmental Protection: Panel-mounted with IP66 equivalent protection from dust and water ingress DigiKey

• Panel Cutout Size: 45 mm × 45 mm square cutout for installation in control panels DigiKey

• Operating Conditions:
   • Ambient temperature: 0 °C to 50 °C DigiKey
   • Humidity: 20% to 90% RH (non-condensing)Accuracy & Response: Thermocouple / RTD input accuracy typically ±0.3% of input plus 1 digit

• Sampling / Conversion Speed: 250 ms update / sampling cycle

• Additional Features:
   • Blind function (hide unused parameters) 
   • Priority display (up to 9 parameter screens)
   • Ramp function (gradual setpoint changes) zytrondirect.com+1
   • Manual / Auto mode switching, event outputs, digital PV filtering 
   • Optional RS-485 communication (TOHO protocol or MODBUS)

Advantages & Application Highlights

• Compact 1/16 DIN Size: Saves panel space while retaining full-featured control capabilities

• Versatile Sensor Compatibility: Accepts many thermocouple types plus RTDs, enabling flexible integration

• Automatic PID Tuning: Simplifies setup and improves control stability

• Strong Protection: IP66-level design ensures reliable operation in harsh or dusty environments

• Intuitive Operation: LED display and front keys make programming, monitoring, and diagnostics straightforward

• Advanced Features: Ramp, blind function, priority display, and optional communication make this suitable for complex control systems