Hydronix Hydro-Control VI Installation Manual page 26

Electrical Installation
6 I/O Wiring Diagrams
It is recommended that any field wiring is protected by an emergency stop device that can
disconnect the devices being controlled from the signal given by the Hydro-Control in the event of
any problems.
Wiring digital inputs
6.1
This functions in a similar way to the coil side of a normally-open relay. To switch on the relay,
apply the correct potential across the terminals.
24Vdc / 110ac (L)
0Vdc / 110ac (N)
Wiring digital outputs
6.2
This functions in a similar way to the voltage free contact side of a normally-open relay. The
Hydro-Control switches on the relay therefore closing the contacts for the output side. Note
that the AC outputs have a minimum current of 20mA.
24Vdc / 110ac (L)
0Vdc / 110ac (N)
Wiring analogue inputs
6.3
The analogue inputs are current loop inputs, taking a signal of either 0-20mA or 4-20mA. This
is configurable on page 2 of the I/O Setup and Status pages. The connection to an Analogue
Input is shown as in Figure 12.
The wiring of the device connected to the Analogue Input will depend on whether the device
has a self powered loop or is powered by the loop itself.
26 Hydro-Control VI Installation Guide HD0455 Rev 1.9.0
Figure 10: Digital Input Wiring Diagram
Figure 11: Digital Output Wiring Diagram
Current loop signal
0-20 mA
4-20 mA
Figure 12: Analogue Input Current Loop Wiring Diagram
Hydro-Control VI
Hydro-Control VI
+
Hydro-Control VI
125Ω
Analogue GND
-
Chapter 3