Installation Manual
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（7）The recommended torque setting for terminals is shown as below.
Model I/P & O/P DC OK
DRDN20
5.1kgf-cm (4.43Lb-in) TB1: 4.1kgf-cm (3.54Lb-in)
DRDN40
20.21kgf-cm (17.54 Lb-in) TB1: 4.1kgf-cm (3.54Lb-in)
TB2: 5.1kgf-cm (4.43Lb-in)
（8）Mounting Instruction：
Mount as shown in figure only, with input terminals down, or else sufficient cooling will not be possible.
Admissible DIN rail：TS35/7.5 or TS35/15
For rail fastening：
（a）Tilt the unit slightly rearwards.
（b）Fit the unit over top hat rail.
（c）Slide it downward until it hits the stop.
（d）Press against the bottom for locking.
（e）Shake the unit slightly to check the locking action.
（9）For other information about the products, please refer to www.meanwell.com for details.
Typical Application Notes
（1）1+1 Redundancy:
Using 1 more PSU as the redundant unit
"Click"
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