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TEMPERATURE CONTROLLER RTM-03 

USER MANUAL

rtm-03_instr_ext_gb | 29.11.21

APPEARANCE

FEATURES

TECHNICAL DATA

DESCRIPTION

RTM-03

Power input terminals: L, N

Rated supply voltage: 230 V AC

Supply voltage tolerance: -15 ÷ +10 %

Rated mains frequency: 50 / 60 Hz

Rated current load: 26 mA

Supply voltage ON LED: green LED

NTC sensor input terminals: NTC, NTC

Temperature setting range: -10 ÷ +90 ºC

Hysteresis setting range: 0,25 ÷ 2,5 ºC

Relay terminals: 11, 12, 14

Night-Time -5°C Heating input terminals: IN, IN

Power load ON LED: red LED

Relay contact ratings: 16A NO/NC 4000 VA  AC1

Wiring terminals: 9

Wiring size: 0,2 ÷ 2,50 mm

2

Operating temperature: -20 ÷ 60 

o

C

Installation orientation: any

Housing mounting: DIN-Rail

Housing protection rating: IP20

Overvoltage category: II

Pollution class: 2

Dimensions: single module (17.5 mm) 90 × 17.5 × 66 mm

Weight: 0,077 kg

●  Temperature control between -10ºC and 

+90ºC.

●  Incremental hysteresis control from 0.25ºC 

to 2.5ºC.

●  Supports and requires an external NTC 

probe.

●  Sensor connection status indicator.

●  Relay status indicator.

●  Temperature setting-dependent control of 

power loads.

●  Night-Time Heating input (reduces the 

temp. setting by 5°C).

●  Single-module housing.

●  DIN-Rail mountable.

●  Relay output: 16 A max.

The RTM-03 is a temperature controller 

designed for operation of electrical loads 

(such as radiators or resistance floor heating 

systems) in relation of the ambient temperature 

detected by an NTC sensor. The product can 

control the connected power loads according to 

the temperature set with the control potmeter 

on its front panel, with the setting range from 

-10ºC to +90ºC. The other potmeter can 

select one of 10 available hysteresis settings 

of the temperature controller (from 0.25ºC 

to 2.5ºC). The product requires an external 

NTC-03 temperature probe to work properly. 

The temperature probe must be purchased 

separately. The probe wiring is 3 m and can 

be extended by up to 50 m with a 0.2 to 2.50 

mm

2

 core wire. Do not connect several probes 

to the same wire.

Connect this product to a single-

phase power system according to 

applicable electrical and safety 

standards and regulations. See 

this Manual for the wiring instruc-

tions. Installation, wiring and 

adjustment/setting shall only be 

done  by  qualified  electricians 

who have read and understood this User Manual 

and the functions of the product. Do not open or 

otherwise disassemble the product housing; other-

wise the product warranty will be void and an elec-

trocution hazard may occur. Prior to installing and 

wiring this product, make sure that the wiring to be 

connected is not live. The conditions and methods 

of transport, storage and operation of this product 

may affect its performance. Do not install the prod-

uct if any of its components are missing, the product 

is damaged or deformed in any way. If any malfunc-

tions are found, consult the manufacturer.

CAUTION

Relay output terminals (11; 12; 14)

Do not dispose of this device with other 

waste! In order to avoid harmful effects on 

the environment and human health, the 

used device should be stored in designated 

areas. For this purpose, you can dispose 

of household waste free of charge and in 

any quantity to a collection point set up, 

as well as to the shop when you buy new 

equipment.

ZAMEL 

Sp. z o.o.

Power input terminals

ON temperature setting

Hysteresis setting

NTC sensor input terminals

Night Time Heating input terminals

Relay status indicator
Supply voltage / sensor wiring status 
indicator

NTC probe

ul. Zielona 27, 43-200 Pszczyna, Poland

tel. +48 (32) 210 46 65, fax +48 (32) 210 80 04

www.zamel.com

, e-mail: [email protected]

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