Hach-Lange BUHLER 1027 wall mount automatic water sampler (BL series) - Manual (Page 37)

Installation
Page 37 Manual BÜHLER 1027
Connections
Connector assignment – RS 232
(plug)
1 = Rx
2 = Volt-free
3 = Tx
4 = Volt-free
5 = Gnd
Connector assignment – input signals
(plug)
Pin assignment:
1 = Flow analogue +
2 = Flow analogue -
3 = COM
4 = Flow digital (pulse)
5 = Event
6 = Volt-free
Connector assignment – message
• Message
Connection at relay as normally open or normally closed contact.