TT8900 OPT
–
Installation and Service Manual
Page 39 of 41
5.8
Replacing the Power Supply Unit (PSU)
Tools Required: Flat head screwdriver.
Important: For replacing the PSU, we recommend the engagement of a suitable electrical
contractor that is familiar with TT equipment and the methodology required to safely access
and navigate the internal configuration system embedded within the OPT.
In the unfortunate event the PSU needs to be replaced, follow
these steps to complete the swap and resume normal
operations:
1.
Open the TT8900 OPT door using the commissioned
key.
2.
Power off the UPS battery then, disconnect the TT8900
OPT unit from the mains power.
3.
Locate the PSU and:
»
Disconnect all the connected cables.
»
Using a Phillips head screwdriver, open the latch
located on the bottom side of the unit and
remove the PSU.
4.
Install the new PSU on the DIN rail by undoing steps 3-1.
5.
Important: Adjust the output voltage to +26VDC +/- 0.1,
as shown in
Figure 28
.
6.
Once the front door is closed, turn on the power and resume your TT8900 OPT activity.
5.9
Replacing the UPS Battery
In the unfortunate event the USP battery needs to be replaced, follow
these steps to complete the swap and resume normal operations:
1.
Open the TT8900 OPT door using the commissioned key.
2.
Power off the UPS battery then, disconnect the TT8900 OPT
unit from the mains power.
3.
Disconnect the UPS battery from the OPT.
4.
While pushing the battery downwards, swing the top side
away from the rail to release it.
5.
Install the new UPS battery on the DIN rail:
»
Aling the battery’s bottom side of the locking
mechanism to the DIN rail.
»
While pushing the battery upwards, swing the top side
against the DIN rail until it snaps in. (
Figure 29
)
»
Connect the battery’s cable to the OPT’s UPS.
»
Switch ON its power button.
6.
Once the front door is closed, turn on the power and resume
your TT8900 OPT activity.
Figure 28: PSU Replacement
Figure 29: UPS Battery
Replacement