
Introduction
will interfere with the DPU cover. It may be possible to move the terminator
to the other end of the daisy chain or to rearrange the order of the daisy-chain
cables to eliminate the interference.
If this is not possible, a cable adapter is available (Metso Automation Part
Number 081580). This adapter has a metal bracket which mounts to the
power strut and a 12-inch connecting cable plugs into J3 or J4 on the back
panel. It is a male-female adapter so that the original cable or terminator can
be plugged directly into the adapter out of the way of interference with the
DPU.
The DPU is designed to allow installation and removal with the +24VDC
power supply turned on.
Mounting Procedures
Before mounting any hardware, refer to the cabling and field wiring sections
of Publication 278596, maxPAC Hardware Reference Guide, and Publication
278563, Model IOP Input/Output System Installation and Preparation.
To install the DPU in the rack, refer to the information contained the chapter
titled “Starting the DPU”.
Locating Front Panel and Chassis Controls and Features
All DPU controls, indicator LEDs, key switch, and push button switches are
accessible from either the DPU’s front or chassis panels. Use this front panel
to monitor or control different aspects of the DPU. There are no internal
switches or jumpers to be set during installation.
The DPU contains a battery to allow it to save its configuration in the event
of a power failure. Be sure that the battery is connected before putting the
DPU into service. Refer to the chapter that describes DPU battery and fuse
maintenance.
DPU Chassis Panel
The DPU chassis panel contains all I/O connections, rotary switches, and a
key lock switch. Refer to the following sections for a brief description of
each feature.
Serial Ports
Metso Automation MAX Controls Inc. • 278590 •
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