- 19 - Rev 2
The diagram illustrates the Ethernet communication and 24 VDC power cable connections required
to support 6 ITVs when Power Over Ethernet (POE) is in use. The ITVs in the dashed box form a
single POE group. Note that POE supports a maximum of five (5) ITVs in one POE group.
The following rules MUST be followed for proper operation of POE:
1) Ethernet cable from the PLC or other device (source) must be connected to the “Bus In” on
the first ITV in a POE group.
2) Ethernet cable between the ITV’s within the POE group must be connected between the
“Bus Out” port of the upstream ITV and the “Bus In” port of the downstream ITV for ALL
ITVs.
NEVER connect “Bus Out” of an ITV which has POE Enabled to ANYTHING other than “Bus In”
of another ITV. “Bus Out” of a POE Enabled ITV provides a 24 VDC power source for the next
ITV. Failure to follow this precaution can result in equipment damage.
3) A maximum of 5 ITV’s is allowed in each POE group.
4) The “Bus Out” port on the last ITV (POE disabled) in the group may be connected as the
communication source to a downstream device.
5) The first ITV within a POE group must have a power connection to a 24 VDC power supply.
The first ITV is the ONLY ITV in the group with a connection to the 24 VDC power supply.
6) Every ITV in the group (EXCEPT THE FINAL ITV) MUST have POE ENABLED. The FINAL ITV
MUST have POE DISABLED.
7) A power supply connection is required for the first ITV following a POE group.
8) Multiple POE groups can be connected together, and the number of ITV’s in each POE group
can vary as necessary (maximum of 5 ITVs per group).
13. Hold on Connection Loss
Hold on Connection Loss - checkbox is used to control ITV behavior in the event Ethernet
communication is lost to the PLC. If Ethernet communication is lost when checked and the ITV is
powered, the ITV will continue to actively regulate to the pervious pressure setpoint. If Ethernet
communication is lost with unchecked and the ITV is powered, the ITV will set the pressure
setpoint to 0 and the output pressure will be immediately exhausted. Note: If power is lost, the ITV
will stop actively regulating to the setpoint. This does not mean the pressure will drop to zero.
14. Compatibility Mode
Compatibility Mode - checkbox is checked, it will allow for the DUX02357 ITV to simulate the
DUQ00833 v2.2 configuration. This allows the DUX02357 to be used on a machine that was
originally programmed for the DUQ00833 ITV without having to be reprogrammed. Basically, you
can retrofit a DUX in for a DUQ. Note: If compatibility mode is selected the ITV will not work with
the DUX EDS file. When the compatibility checkbox is changed, press “submit”, or the keyboard
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