Indicator & Alarm Unit - Type 40T72 | Gefran

Gefran 40T72 Process Indicator & Alarm Unit

The Gefran 40T72 is a 72×36 mm panel-mounted process indicator and alarm unit for temperature or linear process signals. It is not a PID controller; its primary functions are local PV indication, limit monitoring, and digital alarm signaling in machine panels. The Lexan front panel is rated IP65, featuring three keys and a 2-, 3-, or 4-digit LED display.

Measurement Inputs

Input selection is performed via the front panel and terminal assignment, with no external shunt or adapter required. Supported input types 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 sensors
• 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

Alarm Outputs & Retransmission

Up to three trip points are configurable. Outputs are available as relay (5 A / 250 Vac) or logic (0–11 Vdc). The third output can be replaced by a 4–20 mA analog retransmission or a 24 Vdc / 4 mA digital input for reset, hold, flash, peak handling, or latch release functions.

Sampling Time & Scaling

For linear inputs, sampling time is selectable at 120, 60, 30, or 15 ms, with resolution from 8000 to 2000 divisions. The 4-digit display range is adjustable from -1999 to 9999. Custom linearization up to 32 points is supported for engineering units.

Typical Applications

• High/low temperature alarms in furnaces and thermal zones
• Indication of 4–20 mA or 0–10 V transmitter signals
• Temperature monitoring in packaging and food processing machinery
• Local indication on test benches and auxiliary panels
• Repeat indication with alarm contacts to PLC or relay logic

Operating Conditions & Standards

Power supply: 11–27 Vdc or 18–27 Vac, max consumption 4.5 VA. UKCA declaration covers RoHS, EMC, and Electrical Equipment Safety Regulations, with compliance to EN 63000:2018, EN 61326-1:2013, and EN 61010-1:2010.