9.9.4.4 Discharging KCM modules
The aids supplied with each KCM module (plug-in bridge/connecting cables) allows dis-
charging the modules safely.
When the charging LED on top of the modules flashes, the capacitors are charged. Please
note, however, that the LED does not allow you to draw a definite conclusion about the state
of discharge, as it is not monitored for failures.
DANGER
High DC Voltage up to 900 V!
There is a danger of serious personal injury or death by electrical shock
or electrical arcing.
Switch off (disconnect) the line voltage. You must only work on the con-
nections when the system is disconnected.
Check the state of charge with a measuring device that is suitable for a
DC voltage of up to 1,000 V.
Wait until the voltage measured between the DC+/DC- terminals or to
ground has dropped below 50 V.
It can take over an hour for the modules to self-discharge.
If you cannot wait for the duration of the self-discharge time, you must
force the modules to discharge.
Follow the procedure described below when forcing the modules to dis-
charge.
For your own safety, proceed as follows when forcing the modules to discharge:
1. Switch off (disconnect) the line voltage.
2. Discharge the modules:
KCM-S/-P: Insert the plug-in bridge in the screw terminals (black-1 to gray-2) on the base
of the modules, wait at least 70 s, leave the plug-in bridge in place (as a means of secur-
ing for transport). Remove the plug-in bridge again before recommissioning.
KCM-E: Bridge the X2/X3 connector with a connecting cable on the top of the module,
wait at least 70 s, leave the connecting cable in place (as a means of securing for trans-
port). Detach the connecting cable and reconnect the KCM-E properly before recom-
missioning.
3. Perform the scheduled task (e.g. cleaning, maintenance, or deinstallation).
AKD Installation | 9 Electrical Installation
Kollmorgen | kdn.kollmorgen.com | October 2017 115
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