Installation pH 170
108
Terminal
Terminal assignment
X1
X2
1
A (RS 485 option)
REC 1 +
2
B (RS 485 option)
REC 1
–
3
GND (RS 485 option)
REC 2 +
4
Sens-Check
REC 2
–
5
Sens-Check
a (sensor)
6
K1 (R option)
b (sensor)
7
K1 (R option)
c (sensor)
8
K2 (R option)
d (sensor)
9
K2 (R option)
e (sensor)
10
N (mains)
f (sensor)
11
L1 (mains)
g (sensor)
12
–
h (sensor)
13
–
i (sensor)
Note:
For power supplies above 24 VDC, use the following wiring:
L
1
+ 24 V
N
GND
