ITT Hydrovar User Manual

33
Electrical Installation and Wiring
RS-485 – Internal interface RS-485 - User interface
The internal RS-485 Interface is used for communicating between up to 8 HYDROVARs in a
multi-pump application. This connection uses terminals X4/4-6 on the control card, or terminals
X2/1-3 on the power unit. (Example: using one master and three basic drives.)
Using the RS-485 – User interface on the control card, one or more HYDROVAR can communi-
cate by standard Modbus-protocol with an external control device (e.g. PLC). This interface can
be used for controlling the HYDROVAR with external devices. Also available on HYDROVAR
Single drives.
Do not use the internal interface for communicating with Modbus!
X4 X4
6 GND
5 SIO +
4 SIO -
3 GND
2 SIO +
1 SIO -
GND
SIO +
SIO -
GND
SIO +
SIO -
GND
SIO +
SIO -
GND
SIO +
SIO -
6
5
4
X4
X2 X2 X2
HYDROVAR Master Inverter
Control Card
HYDROVAR Basic Inverter
Power Unit
HYDROVAR Basic Inverter
Power Unit
HYDROVAR Basic Inverter
Power Unit
GND
SIO +
SIO -
3
2
1
X4
HYDROVAR User Interface
GND
SIO +
SIO -
PLC

ITT Hydrovar Specifications

General

Brand	ITT
Model	Hydrovar
Category	Inverter
Language	English