Hach Surface Scatter 7 sc User Manual page 30

Installation
Terminal number
1
2
3
4
5
6
1 From SS7 sc
26
Table 4 Wiring the SS7 sc at terminal block J5
Terminal designation
Data (+)
Data (–)
Service request
+12 V dc
Circuit common
Shield
Figure 15 Hard-wiring the SS7 sc
No connection
Shield (gray wire in existing quick disconnect fitting)
2 Disconnect power
Wire color
Blue
White
Brown
Black