Danfoss VLT - Page 41

VLT Installation
Rev.02
39
North America
Motion Controls
Confidential / Property of Danfoss Drives A/S
Control Wiring, Digital Inputs, 12-27 Enable
• Jumper terminal 12 (+24Vdc) to terminal 27 (enable
command)
• Without jumper, bottom line of the display reads, “UNIT
READY”, or “UN. READY” and it does not operate the
motor. When this jumper is made, the bottom line
reads, “STANDBY”.
5) Wiring
f. Control Wiring
5) Wiring the Drive
f. Control Wiring
In its default state, the way it comes from the factory, a jumper or a connection is
required for operation. It must be connected between terminals 12 (24Vdc) and 27
(Digital Input), which defaults to a “coasting stop inverse” command. If terminal 27
does not see 24Vdc, the drive is not enabled and it does not operate. A display on
the front of the drive gives a clear indication when this occurs. After pressing the
“Display/ Status” key, the bottom line reads, “UNIT READY” or “UN. READY”. When
ever this display is seen, a connection between terminals 12 and 27 is missing.
Once this connection is made, the bottom line changes to read, “STANDBY”.
More details concerning Control wiring is presented in the next training modules.