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4.3.5 Heatsink
Assembly
`4B75 Case
In order to access the Heatsink Assembly the DIN Rail mounting bracket will need to be removed, see
instructions above for removal of the DIN Rail mounting bracket. After the bracket is removed, remove the
wires connected to the Heatsink Assembly (most connections are made within the assembly, those connections
do not need to be removed). Be sure to mark or label the wires so that they can be easily reinstalled (It may
be a good idea to tape the wires to the bottom or side of the case and label the tape). Next remove the two
bolts holding to assembly to the baseplate and remove the assembly from the unit. Installation is the reverse of
removal.
WARNING: take care to plug all wires/cables into there correct locations.
475 Case
The Heatsink Assembly is located at the top left of the unit. Remove the wires connected to the Heatsink
Assembly (most connections are made within the assembly; those connections do not need to be removed). Be
sure to mark or label the wires so that they can be easily reinstalled (It may be a good idea to tape the wires to
the bottom or side of the case and label the tape). Remove the four bolts from the mounting legs (two on each
leg). Installation is the reverse of removal.
WARNING: take care to plug all wires/cables into there
correct locations.
975 Case
The Heatsink Assembly is located at the bottom of the unit. Remove the wires connected to the Heatsink
Assembly (most connections are made within the assembly; those connections do not need to be removed). Be
sure to mark or label the wires so that they can be easily reinstalled (It may be a good idea to tape the wires to
the bottom or side of the case and label the tape). Remove the four bolts from the mounting legs (one on each
leg). Installation is the reverse of removal.
WARNING: take care to plug all wires/cables into there
correct locations.
72 Case
To gain access to the Heatsink Assembly the top cover must be removed. Remove the wires connected to the
Heatsink Assembly (most connections are made within the assembly; those connections do not need to be
removed). Remove the wires connecting to the resistor. If the Blocking Diode and/or the Reverse Polarity
Diode option are included in the unit, the wiring to those diodes must also be removed. Be sure to mark or
label the wires so that they can be easily reinstalled. Remove the four bolts that hold the mounting plate to the
legs and carefully lift the assembly from the unit. Remove the Assembly for the Blocking Diode and/or the
Reverse Polarity Diode and move it to the new mounting plate. Installation is the reverse of removal.
WARNING: take care to plug all wires/cables into there correct locations.
