Products / General Purpose Controllers

LTR-Series Electronic Controllers

Single-output general-purpose controller

SINGLE-CHANNEL CONTROL, MULTIPLE INPUT AND POWER-SUPPLY OPTIONS.

LTR-5 is a compact, single-output controller for general-purpose cooling/heating or humidity control, with PID autotuning or ON/OFF control, a selectable PTC1000, NTC10K or 0-1V (rH%) input depending on model code, and a choice of mains power-supply options (12Vac/dc, 230Vac or 115Vac).

Key Features

Single output, ON/OFF or PID with autotuning
Cooling/heating and humidifying/dehumidifying, selectable
Main output: changeover relay or external SSR control
PTC1000, NTC10K or 0-1V (rH%) input, model dependent
Available with various mains power-supply options (12Vac/dc, 230Vac, 115Vac)
TTL or RS485 serial port with selectable ASCII/RTU protocol
Reliable mechanical keypad

Product range

	Technical Data
		LTR-5T	LTR-5C	LTR-5A
Inputs	Type	PTC1000	NTC10K	0-1V (rH%)
	Range	-50÷150°C / -60÷300°F	-40÷125°C / -40÷260°F	0..99% r.H.
	Accuracy*	<±0.3°C -50..140°C; ±1°C out of that range	<±0.3°C -40..100°C; ±1°C out of that range	<±0.7% r.H. in the measuring range
Outputs	OUT1 (Relay)	3.6 FLA, 21.6 LRA @ 240Vac; 16A resistive
Outputs	OUT1 (External SSR control)	15mA 12Vdc
Technical specifications	Power supply	LTR-5…D 12Vac/dc ±10%, 2W LTR-5…E 230Vac ±10%, 50/60Hz, 2W LTR-5…U 115Vac ±10%, 50/60Hz, 2W
	Front protection	IP54 (with gasket)
	Buzzer	No
	Real Time Clock battery	No
	Dimensions	77 x 35 x 77 mm
	Panel-cutout	71 x 29 mm (WxH)
Environment conditions	Operating temperature & humidity	-10… +50°C; 15%… 80% rH
Conformity	Marks	CE
Conformity	Use with flammable refrigerants	No

Documentation

Access datasheets, manuals, software and technical resources of CD5.

355 KB

Technical Data LTR-5

Updated 18/12/2025

.PDF

821 KB

Instructions for use LTR-5

Updated 12/06/2026

IT EN DE FR GR PT

.PDF

LAE Electronic S.p.A.

Via Padova, 25

31046 Oderzo (TV), Italy

VAT 02205880269

Tel: +39 0422 815320

Mail: info@lae-electronic.com