For basic serial communication set-up, perform the
following steps:
1.
Connect RS485 serial communication wiring to
terminals (+)68 and (-)69.
1a
Use shielded serial communication cable
(recommended).
1b
See
chapter 5.6 Connecting to Ground
for
proper grounding.
2.
Select the following parameter settings:
2a
Protocol type in
parameter 8-30 Protocol
.
2b
Drive address in
parameter 8-31 Address
.
2c
Baud rate in
parameter 8-32 Baud Rate
.
61
68
69
+
130BB489.10
RS485
Illustration 5.21 Serial Communication Wiring Diagram
5.8.6 Wiring Safe Torque Off (STO)
The Safe Torque Off (STO) function is a component in a
safety control system. STO prevents the unit from
generating the voltage required to rotate the motor.
To run STO, more wiring for the drive is required. Refer to
Safe Torque Off Operating Guide
for further information.
5.8.7 Wiring the Space Heater
The space heater is an option used to prevent conden-
sation from forming inside the enclosure when the unit is
turned off. It is designed to be field wired and controlled
by an HVAC management system.
Specifications
•
Nominal voltage: 100–240
•
Wire size: 12–24 AWG
5.8.8 Wiring the Auxiliary Contacts to the
Disconnect
The disconnect is an option that is installed at the factory.
The auxiliary contacts, which are signal accessories used
with the disconnect, are not installed at the factory to
allow more flexibility during installation. The contacts snap
into place without the need for tools.
Contacts must be installed in specific locations on the
disconnect depending upon their functions. Refer to the
datasheet included in the accessory bag that comes with
the drive.
Specifications
•
U
i
/[V]: 690
•
U
imp
/[kV]: 4
•
Pollution degree: 3
•
I
th
/[A]: 16
•
Cable size: 1...2x0.75...2.5 mm
2
•
Maximum fuse: 16 A/gG
•
NEMA: A600, R300, wire size: 18–14 AWG, 1(2)
5.8.9 Wiring the Brake Resistor Temperature
Switch
The brake resistor terminal block is located on the power
card and allows for the connection of an external brake
resistor temperature switch. The switch can be configured
as normally closed or normally open. If the input changes,
a signal trips the drive and shows
alarm 27, Brake chopper
fault
on the LCP display. At the same time, the drive stops
braking and the motor coasts.
1.
Locate the brake resistor terminal block (terminals
104–106) on the power card. See
.
2.
Remove the M3 screws that hold the jumper to
the power card.
3.
Remove the jumper and wire the brake resistor
temperature switch in 1 of the following configu-
rations:
3a
Normally closed
. Connect to terminals
104 and 106.
3b
Normally open
. Connect to terminals
104 and 105.
4.
Secure the switch wires with the M3 screws.
Torque to 0.5-0.6 Nm (5 in lb).
Electrical Installation
VLT® HVAC Drive FC 102
44
Danfoss A/S © 01/2017 All rights reserved.
MG16O102
5
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