ITT HYDROVAR Series User Manual

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If the HYDROVAR is used as Basic Inverter in a multi-pump system, the internal interface on
the power unit is used for the serial RS-485 connection to the other HYDROVAR in the
system. (Be careful: Internal Interface is not active for Single Inverter configuration!)
X2 RS485-Interface – Power Unit
SIO -
Internal SIO-Interface: SIO-
SIO +
Internal SIO-Interface: SIO+
X2/
GND
GND, electronic ground
Internal Interface
for multi-pump-systems
……. Parameter not available for a HYDROVAR Single Inverter
The internal RS-485 Interface on the Power Unit is used for the communication between
up to 8 HYDROVARs in a multi-pump system (Minimum 1 Master Inverter). For the
connection to each HYDROVAR via the RS-485 interface the terminals X2/1-3 on the power
unit can be used twice. Even the terminals X4/4-6 on the Control Card, can be used.
RS485 – Internal Interface
Mechanical connection of the Terminal:
- Use recommended Cable type (see chapter 9.3)
- Strip the end of the used wire (about 5 … 6mm)
- push down the orange wedges by using a small screwdriver
- insert the stripped wire
- remove the screwdriver to fix the wire
- To remove, push down the orange wedges and pull out the wire!
Connection example using one Master- and three Basic - Inverters:
S
S

ITT HYDROVAR Series Specifications

General

Brand	ITT
Model	HYDROVAR Series
Category	Control Unit
Language	English