Wiring To Control Terminals; Using Shielded Control Cables - Danfoss VLT FC 103 Instruction Manual

Installation
Terminal
55
2 2
61
68 (+)
69 (-)
01, 02, 03
04, 05, 06
Table 2.5 Terminal Description

2.4.6.2 Wiring to Control Terminals

Control terminal connectors can be unplugged from the
adjustable frequency drive for ease of installation, as
shown in Figure 2.29.
Figure 2.29 Unplugging Control Terminals
1. Open the contact by inserting a small screwdriver
into the slot above or below the contact, as
shown in Figure 2.30.
2. Insert the bared control wire into the contact.
24
Digital Inputs/Outputs
Parameter Default
Setting
- Common for analog
input.
Serial Communication
- Integrated RC filter for
cable screen. ONLY for
connecting the shield
when experiencing
EMC problems.
8-3* RS-485 Interface. A
control card switch is
8-3*
provided for
termination resistance.
Relays
5-40 [2] Drive ready Form C relay output.
Usable for AC or DC
5-40 [5] Running
voltage and resistive
or inductive loads.
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
Instruction Manual
3.
Description
4.
See chapter 10.1 Power-dependent Specifications for control
terminal wiring sizes.
See chapter 6 Application Set-up Examples for typical control
wiring connections.
Figure 2.30 Connecting Control Wiring

2.4.6.3 Using Shielded Control Cables

Correct shielding
The preferred method in most cases is to secure control
and serial communication cables with shielding clamps
provided at both ends to ensure best possible high
frequency cable contact.
If the ground potential between the adjustable frequency
drive and the PLC is different, electrical noise may occur
that will disturb the entire system. Solve this problem by
fitting an equalizing cable next to the control cable.
Minimum cable cross-section: 16 mm
Figure 2.31 Correct Shielding
1
2
Table 2.6 Legend to Figure 2.31
Remove the screwdriver to fasten the control wire
into the contact.
Ensure the contact is firmly established and not
loose. Loose control wiring can be the source of
equipment faults or less than optimal operation.
1
2
2
PLC
PE PE
<10 mm
PE PE
1
2
Min. 0.025 in 2 [16 mm 2 ]
Equalizing cable
.
FC
MG16E222