PL-601
EnviroRanger Installation Guide
Page 33
Wi
ri
n
g
When wiring serial communications to a Dolphin Plus Unit, you need to
only connect the Rx, Tx and signal ground lines. See the Dolphin Plus
manual for more detailed wiring information.
See the EnviroRanger Communications Reference for more details on
wiring for Modbus-based SCADA systems.
Discrete Inputs
Discrete inputs are used to trigger or alter the way EnviroRanger controls
devices such as pumps and alarms. These inputs accept a dc current
between 10 and 50 V as the signal triggered by an external device such as
a pump, float, or other alarm.
These external devices are either self-powered or passive. The self-
powered device supplies its’ own dc voltage. The passive device uses
power supplied by the EnviroRanger.
Rack and Panel Mount
Discrete inputs have a positive and negative terminal.
Rack Mount Powered by External Device
common (neg.) for discrete inputs 5 and 6
discrete input (pos.) 6
discrete input (pos.) 5
discrete input (pos.) 4
discrete input (pos.) 1
discrete input (pos.) 2
discrete input (pos.) 3
common (neg.) for discrete inputs 1 to 4
discrete input (pos.) 7
discrete input (neg.) 7
discrete input (neg.) 8
discrete input (pos.) 8