Hach 900 MAX - Manual (Page 92)

Page 90
Alarm Relays
8990cm.fm
Section 6
6.4.1 Alarm Relays Connection
Figure 26 Relay Pin Connections
Relay Junction Box
Required relay box is an alarm relay box assembly with a 10-ft long cable with
a 6-pin connector on one end and a relay box on the other end (
Figure 27 ).
1. Choose Normally Closed (NC) or Normally Open (NO) connections.
2. Connect one wire to the common (COM) and the other to the connector
with the preferred signal.
Table 17 Relay Connector (J17)
Pin Signal Description Wire Color
A +12 V dc Red
B Relay #1 Yellow
C Relay #2 Black
D Relay #3 Red
E Relay #4 Green
Table 18 Relays
Connector Relay
J2 1
J3 2
J4 3
J5 4