JRC JMR-92 Series Field Service Manual page 697

Step 8 Disconnect the sensor LAN switch unit cables.
Disconnect all the LAN cables being connected to the sensor LAN switch unit.
Use the same LAN cable connection ports after replacement.
Remove the screw (M4: 2 locations) from the power supply port terminal block of the sensor
LAN switch unit and take out the power cable together with the terminal block.
If a UPS is installed, remove the fuse of the UPS battery first, and then disconnect the power
connector of the UPS. The power connector of the UPS can be removed using the principle of
leverage, by inserting a 2 mm width flat head screwdriver into the groove at the root of the terminal
block in the upper part of the input filter ME-NAX-NEF/QUINT20. For more information, refer to
"4.3.9.1 Replacing the USP Input Filter: ME-NAX-NEF/QUINT20."
An AC power supply has been fed to UPS. Before replacement work, be
sure to turn OFF the circuit breaker of the main power line.
Not following this instruction will cause electric shock and/or malfunction.
Chapter 4 Replacement procedure
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24VDC
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