Removing A Control Wire; Enabling Motor Operation (Terminal 27); Voltage/Current Input Selection (Switches) - Danfoss VLT FC 102 Operating Manual

VLT HVAC Drive FC 102
Operating Guide
4. Ensure that the contact is firmly established and not loose. Loose control wiring can cause equipment faults or less than
optimum operation.

4.8.4.1 Removing a Control Wire

Procedure
1.
Open the contact by inserting a flathead screwdriver (maximum head 4 mm/no. 1) into the slot in the middle between the
2 contacts and push the screwdriver slightly upwards.
2. Remove the control wire from the contact.
3. Remove the screwdriver.

4.8.5 Enabling Motor Operation (Terminal 27)

A jumper wire may be required between terminal 12 (or 13) and terminal 27 for the drive to operate when using factory default
programming values.
• Digital input terminal 27 is designed to receive a 24 V DC external interlock command. In many applications, wire an external
interlock device to terminal 27.
• When no interlock device is used, wire a jumper between control terminal 12 (recommended) or 13 to terminal 27. This provides
an internal 24 V signal on terminal 27.
• When the status line at the bottom of the LCP reads AUTO REMOTE COAST, this indicates that the unit is ready to operate but is
missing an input signal on terminal 27.
• When factory-installed optional equipment is wired to terminal 27:
- Do not remove that wiring.
- Do not add a jumper between terminals 12 and 27.
- Do not disable input 27.
The drive cannot operate without a signal on terminal 27 unless terminal 27 is re-programmed to [0] No operation.

4.8.6 Voltage/Current Input Selection (Switches)

The analog input terminals 53 and 54 allow setting of input signals to voltage (0–10 V) or current (0/4–20 mA).
Default parameter settings:
• Terminal 53: Speed reference signal in open loop (see parameter 16-61 Terminal 53 Switch Setting).
•
Terminal 54: Feedback signal in closed loop (see parameter 16-63 Terminal 54 Switch Settings).
SHOCK HAZARD
AC drives contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to disconnect power to the
drive before changing switch positions may result in death or serious injury.
-
Always disconnect power to the drive before changing switch positions.
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Electrical Installation
AQ267037536117en-000101 / 130R0083