Delta 28-299A Betriebsanleitung Seite 11

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4 Electrical Installation
4.1 Electrical Installation
4.1.1 Control Wiring
The soft starter can be controlled in three ways:
using the buttons on the LCP
via remote inputs
via a serial communication link
The MCD 500 will always respond to a local start or stop command (via the H
Hand On
and O
Off
buttons on the LCP). Pressing the
Auto On
button selects remote control (the MCD 500 will accept commands from the remote inputs). In remote mode, the Auto
On LED will be on. In local mode, the Hand On LED will be on if the MCD 500 is starting or running and the Off LED will be on if
the MCD 500 is stopped or stopping.
4.1.2 Control Terminals
Control terminations use 2.5 mm
2
plug-in terminal blocks. Different models require control voltage to different terminals:
CV1 (24 VAC/VDC) A5, A6
CV2 (110 - 120 VAC) A5, A6
CV2 (220 - 240 VAC) A4, A6
NOTE
If you are not using a thermistor, do not short terminals 05,
06.
All control terminals and relay terminals comply with SELV
(Protective Extra Low Voltage). This protection does not
apply to grounded Delta leg above 400V.
To maintain SELV, all connections made to the control
terminals must be PELV (eg. thermistor must be reinforced/
double insulated from motor).
NOTE
SELV offers protection by way of extra low voltage.
Protection against electric shock is ensured when
the
electrical supply is of the SELV type and the installation is
made as described in local/national r
egulations on SELV
supplies.
NOTE
Galvanic (ensured) isolation is obtained by fulfilling
requirements for higher isolation and by provid
ing the
relevant creepages/clearance distances. These requirements
are described in the IEC61140 standa
rd.
The components that make up the electrical isolation also
comply with the requirements for higher i
solation and the
relevant test as described in IEC61140.
Electrical Installation MCD 500 Operating Instruction
10 MG.17.K3.02 - VLT
®
is a registered Danfoss trademark
44
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