3-18 Installing the Drive
DC590+ Series DC Digital Drive
Power Connections continued
3-Phase Supply, 3-Phase External Contactor continued
3-Phase External Contactor
The contactor does not switch current and is primarily for disconnection and sequencing of the power bridge. It
must be energised directly from the controller by a coil with a rating suitable (AC1) for the controller concerned. No
additional series contacts or switches are permitted since they will interfere with the sequencing of the controller
and cause unreliability and possible failure.
Connect to main contactor terminals Con L and Con N only as described in Appendix E, otherwise
unreliable or dangerous operation may occur - do not connect to a PLC input or sensitive relay.
Slave Relay : If the 3-phase contactor has a coil with an inrush greater than 3A, a slave relay MUST be used to
drive the contactor coil. The contactor and slave relay (if required) MUST have coil voltages compatible with the
controller auxiliary supply voltage.
DO NOT use a slave relay with a coil current less than 25mA as it may be energised by the contact
suppression network.
Frames 4 & 5 : A relay jumper (CONN1) is provided on the power board enabling terminals 3 & 4 to be powered
(auxiliary supply - default position), or to be volt-free (for customers own contactor supply). Refer to
"AH466701U001, U002, U003 (Frames 4 & 5)", page 41H3-46.
DC Contactor : A DC contactor can be used but the sequencing must be adjusted to accommodate its use: an
auxilliary normally open volt-free contact of the contactor must be connected in series with the "ENABLE" input
(C5) to disable the drive until after the contactor is closed.
AC Line Choke
IMPORTANT
Always fit the recommended choke. Refer to Appendix E: “Technical Specifications” - AC
Line Choke.
We can provide suitable chokes, designed to connect directly to the drive terminals. Refer to Appendix E:
"Technical Specifications" - AC Line Choke.
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