Waters Prep Series Installation And Maintenance Manual page 46

External device connections
CHART +
PRESSURE +
PRESSURE —
CHART —
+12 VAC auxiliary power
To connect external devices requiring +12 VAC auxiliary power:
1. Connect one end of a two-conductor cable between the device and the
controller to the appropriate +/– terminals on the device.
2. Connect the positive lead to the +12 VAC terminal on the controller and
the negative lead to an available switch (S1 to S4) terminal.
The maximum current available from the 12-VAC power source,
Tip:
divided among all the devices in use on S1 to S4, is 1.5 A. The maximum
current capacity of any single event (S1 to S4) is 1.0 A.
2-12 Installing the System
+5 VAC switch
closure or TTL
device