Unitronics UniStream PLC Series Installation Manual page 6

Mounting
Note  Mount on a standard DIN-rail.
 Ensure that there is sufficient room on the sides of the device to allow for any I/O
or COM modules.
1. Push the device onto the DIN-rail
until the clips located at the top and
bottom of the unit have snapped
onto the DIN-rail.
2. When properly mounted, the device is
squarely situated on the DIN-rail as
shown below.
Battery: Back-up, First Use, Installation, and Replacement
Back-up
In order to preserve back-up values for RTC
and system data in the event of power off, the
battery must be connected.
First Use
The battery is protected by the PLC's bottom
and inner door.
The battery is supplied installed inside the
unit, with a plastic tab preventing contact.
Pull out this tab before using the device.
Battery Installation and Replacement
 Use proper precautions to prevent Electro-Static Discharge (ESD) while servicing
the battery.
 To preserve back-up values for RTC and system data during battery
Caution
replacement, the controller must be powered.
 Note that disconnecting the battery halts the preservation of back-up values and
causes them to be deleted.
1. Open the bottom and inner doors.
2 If there is a battery present, remove it.
3. Slide the battery into place.
6
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UniStream PLC
Unitronics