Indicator & Alarm Unit - Type 4T48 | Gefran

Gefran 4T48 Process Indicator Unit

The Gefran 4T48 is a microprocessor-based temperature indication unit, 48×48 mm (1/16 DIN), designed for panel door mounting. It is not a PID controller; its primary function is local display of process variables from temperature sensors or linear signals. The Lexan front panel provides IP65 protection, features three keys, and a 4-digit LED display.

Measurement Inputs

Input type is configured via the front panel and terminal selection, without external shunt or adapter. Supported inputs include:

• Thermocouples: J, K, R, S, T, B, E, N, L-GOST, U, G, D, C
• RTD Pt100 / JPt100, 2- or 3-wire
• PTC and NTC thermistors
• Linear signals: 0–60 mV, 12–60 mV, 0/4–20 mA, 0–10 V, 2–10 V, 0–5 V, 1–5 V, 0–1 V, 0.2–1 V

Accuracy and Ranges

Input accuracy is 0.2% f.s. ±1 digit. Sampling time is 120 ms for temperature sensors, adjustable down to 15 ms for linear inputs with corresponding resolution trade-off. Linear scale is configurable from -1999 to 9999. 32-segment linearization is available for non-standard signals.

Power Supply and Auxiliary Outputs

Standard supply is 100–240 Vac ±10%, with optional 11–27 Vac/dc. Auxiliary supply for transmitters: 24 Vdc / 50 mA, 15 Vdc / 50 mA, or 1.2 Vdc for potentiometer, depending on order code.

Typical Applications

• Temperature indication in extrusion lines
• Rubber presses
• Test benches and laboratory setups
• Food processing equipment
• Thermometry and hygrometry with suitable transmitter

Installation Conditions

Operating temperature: 0–50 °C. Storage: -20–70 °C. Humidity: 20–85% RH, non-condensing. Installation depth: 99 mm. Weight: approx. 150 g (full version).

Standards and Certifications

UKCA declaration covers RoHS, EMC, and Electrical Equipment Safety Regulations. Complies with EN IEC 63000:2018, EN 61326-1:2013, and EN 61010-1:2010.