Controller & Programmer - Type 400-401 | Gefran

Gefran 400/401 Temperature Controller – Programmer

The Gefran 400/401 is a 48×48 mm (1/16 DIN) temperature controller designed for panel door mounting in industrial environments. It features a 4-digit LED display, four control keys, and a universal process input suitable for PID or on/off control in localized heating and cooling loops.

Measurement Inputs

Supported input types include thermocouples J, K, R, S, T, B, E, N, Pt100 RTD, PTC sensors, and linear signals (mV, V, mA). The linear input range is configurable from -1999 to 9999, with selectable decimal point placement for process adaptation.

Outputs and Control Functions

Output options include relay contacts (5 A / 250 Vac) or logic outputs for SSR drive. Logic outputs are intended for static relays and power interface devices. The controller supports autotuning, soft-start, power limitation, PWM, heat/cool operation, and up to three alarms (absolute, relative, LBA, HB on model 401).

400 vs 401 Model Differences

The 400 model provides basic temperature control with two outputs. The 401 model adds a third output or an auxiliary current transformer input (50 mAac) for load monitoring, relevant for heating element supervision and fault detection.

Typical Industrial Applications

• Electric furnaces and drying ovens
• Heated plates, molds, and extruders
• HVAC units with temperature control
• Industrial resistive loads with SSR or contactor switching
• Local loops in packaging machinery and thermal processes

Installation and Operating Conditions

Power supply: 100–240 Vac or 11–27 Vac/dc, max 10 VA. Front panel protection: IP65. Operating temperature: 0–50 °C. Relative humidity: 20–85% non-condensing. Indoor installation up to 2000 m altitude.

Standards and Compliance

The 400/401 series complies with CE (RoHS, EMC 2014/30/EU, LVD 2014/35/EU), referencing EN 61326-1 and EN 61010-1. UL certification is available for process control equipment per UL 61010-1 and CAN/CSA-C22.2 No. 61010.1.