12
Temperature controller 70304 | 1.02.00
www.mc-techgroup.com
The electrical connection of the controller
70304
takes place at the terminals on the rear side of the housing and
for the controller
70304.2
at the terminals of the sidewalls.
Wiring plan controller 70304 and 70304.2
Connector block /
terminal
Function
Indication in the display
at normal operation
3/1
Mains L
AC 110-240 V
50/60 Hz 8 VA
3/2
Mains N
3/7
Alarm 2
High temperature
limiter with contini-
ous cutoff
3 A 250 V AC
resistive load
Opens exceeding the ac-
tual value by
+10 °C
2 (closed)
3/8
3/4
Alarm 1
Low temperature
3A 250 V AC
resistive load
Closes reaching the set
value –10 °C
1 (closed
)
3/5
2/6
Triggering
Solid State Relais
+ 12 V 30 mA
3 (triggered)
2/8
0V
2/2
Connection sensor
+ Thermo couple
Pt100 two wire
2/3
- Thermo couple
2/4
Pt100 two wire
For controller with mA-output (optional):
Connector block /
terminal
Function
1/6
mA output
+
1/7
mA output
-
11.1
REPLACING CONTROLLER 703 BY CONTROLLER 70304
Terminals old controller 703
Terminals new controller 70304
L1
3/1
N
3/2
242
3/7
243
3/8
142
3/4
143
3/5
81
2/6
80
2/8
111
2/2
112
2/3
113
2/4
