WELBA MRF-2 Series User Manual

1. Introduction
Page 10 104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020
1.9 Technical data
Operating voltage
see circuit diagram sticker
Relay contact
depending on device - see circuit diagram sticker
max. switching current
depending on device - see circuit diagram sticker
max. switching voltage
depending on device - see circuit diagram sticker
Display
13 mm LED-Display, 3 digits
Display range
-99 .. 999
Number of inputs
2 or 3
Usable sensors
KTY 81-110
KTY 81-210
PT 100 (2- oder 3-Leiter)
PT 1000
Measurement range
- KTY 81-110
- KTY 81-210
- PT 100 - 2 Leiter
- PT 100 - 3 Leiter
- PT 1000
-50° .. +150°C
-50° .. +150°C
-99° .. +400°C
-99° .. +400°C
-99° .. +400°C
Digital inputs
up to 5 (via opto coupler)
Temperature alarms
2 (independently)
Control mode
two-step / three-step control
PID (continuous or pulsed)
Hysteresis
0,1 K .. 99,9 K freely adjustable
Housing MRF-2
(Front panel mount.)
Housing MRH-2
(Rear wall mount.)
- Front size 106 x 68 mm
- Front panel cut 87 x 56 mm
- Overall dimension 108 x 80 mm
- Front panel cut 87,2 x 66,2 mm
Installation conditions
Regulator is designed as ,built-in appliance‘
Degree of protection
- Housing front
- Rear
IP 64
IP 00
Electrical safety
Overvoltage category III, pollution degree I
Connection
Plug-in screw connections
for cables up to 2,5 mm²
Environment specifications:
- Operation temperature
- Storage temperature
- max. humidity
0° .. +50°C
-20° .. +70°C
75% (no dew)
Pollution degree
Electrically conductive pollution must not enter the
housing interior
Overvoltage category
CAT II
Technical data subject to change

WELBA MRF-2 Series Specifications

General

Brand	WELBA
Model	MRF-2 Series
Category	Controller
Language	English