Danfoss VLT AutomationDrive EZ FC 321 User manual

Installation Guide
VLT®AutomationDrive EZ FC 321
0.33–200 hp
vlt-drives.danfoss.com

•
•
•
•
•
•
•
•
•
1 Overview
1.1 Safety and Installation Awareness
Before starting installation, get familiarized with all safety guidelines and precautions in this guide. Additional resources - including
the VLT® Safe Torque Off Operating Guide for VLT® AutomationDrive EZ FC 321, the Programming Guide, and the Application Guide
- can be downloaded at www.danfoss.com/service-and-support.
1.2 Tools Needed
The following tools are required for installing the VLT® AutomationDrive EZ FC 321.
Lifting aids to place the unit into position.
Drill with 10 mm and 12 mm drill bits.
Tape measurer.
Torx, Phillips, and slotted screwdrivers (T15, T20, T25, T30, T50, PZ1, SL1, and SL2).
Wrench with extensions and 7–17 mm sockets.
Wire crimper.
Sheet metal punch and/or pliers for cable entry plate.
1.3 Items Supplied
Items supplied vary according to product configuration.
Make sure that the items supplied and the information on the nameplate correspond to the order confirmation.
Check the packaging and the drive visually for damage caused by inappropriate handling during shipment. File any claim for
damages with the carrier. Retain damaged parts for clarification.
e30bj018.10
RUS LISTED
76 X1 E134261 IND. CONT. EQ.
UL Voltage 525-600 V
DANGER
See manual for special condition/mains fuse
voir manual de conditions speciales/fusibles
`
15 min.
VLT
R
Automation Drive
T/C: FC-321P75KT5P20H2XGCXXXSXXXXAXBXCXXXXDX
P/N: 134G6302 S/N: 999999G999
55 kW / 75 kW; 75 kW / 90 kW (NO)
IN: 3x380-500V 50/60Hz 87/86A; 161/145A (NO)
OUT: 3x0-Vin 0-590Hz 87/83A; 105/100A (NO)
Chassis/IP20 Tamb. 50
C /122 F
o o
MADE IN USA
Danfoss A/S
6430 Nordborg Denmark
www.danfoss.com
1
2
3
4
5
6
7
8
9
10
Illustration 1: Nameplate Example
AN354546796134en-000201 / 130R09542 | Danfoss A/S © 2021.05
Overview
VLT®AutomationDrive EZ FC 321
Installation Guide

1
Type code
2
Code number
3
Serial number
4
Power rating
5
Input voltage, frequency, and current (at low/high
voltages)
6
Output voltage, frequency, and current (at low/high
voltages)
7
Enclosure size and IP rating
8
Maximum ambient temperature
9
Certifications
10
Discharge time (Warning)
NOTICE
Do not remove the nameplate from the drive (loss of warranty).
AN354546796134en-000201 / 130R0954 | 3Danfoss A/S © 2021.05
Overview
VLT®AutomationDrive EZ FC 321
Installation Guide

•
•
•
•
-
2 Safety Instructions
2.1 Overview
This Safety chapter only relates to installing the drive. When programming or operating the drive, refer to the Application Guide or
Programming Guide for applicable safety instructions. To install this product safely:
Check that the content of the delivery is correct and complete.
Never install or start up damaged units. File a complaint immediately to the shipping company, if you receive a damaged unit.
Follow the instructions provided in this installation guide.
Make sure that all personnel working on or with the drive have read and understood this guide and any additional product
manuals. Contact Danfoss if you are unclear of the given information, or if you are missing information.
2.2 Target Group and Necessary Qualifications
Correct and reliable transport, storage, installation, operation, and maintenance are required for the trouble-free and safe operation
of the drive. Only skilled personnel are allowed to perform all related activities for these tasks. Skilled personnel are defined as
properly trained staff, who are familiar with and authorized to install, commission, and maintain equipment, systems, and circuits in
accordance with pertinent laws and regulations. Also, the skilled personnel must be familiar with the instructions and safety meas-
ures described in this manual and the other product-specific manuals. If you are not a skilled electrician, do not perform any electri-
cal installation, and troubleshooting activities.
2.3 Safety Symbols
The following symbols are used in this manual:
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
Indicates information considered important, but not hazard-related (for example, messages relating to property damage).
2.4 General Safety Precautions
For US and Canadian markets:
NOTE! Download the English and French product guides with applicable safety, warning and caution information from https://
www.danfoss.com/en/service-and-support/.
REMARQUE Vous pouvez télécharger les versions anglaise et française des guides produit contenant l'ensemble des informations
de sécurité, avertissements et mises en garde applicables sur le site https://www.danfoss.com/en/service-and-support/.
WARNING
LACK OF SAFETY AWARENESS
This document gives important information on how to prevent injury and damage to the equipment or the system. Ignoring
them can lead to death, serious injury, or severe damage to the equipment.
Make sure to fully understand the dangers and safety measures incurred in the application.
AN354546796134en-000201 / 130R09544 | Danfoss A/S © 2021.05
Safety Instructions
VLT®AutomationDrive EZ FC 321
Installation Guide

-
-
-
-
-
-
-
-
-
WARNING
HAZARDOUS VOLTAGE
AC drives contain hazardous voltage when connected to the AC mains or connected on the DC terminals. Failure to perform
installation, start-up, and maintenance by skilled personnel can result in death or serious injury.
Only skilled personnel must perform installation, start-up, and maintenance.
WARNING
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain charged even when the drive is not powered. High voltage can be
present even when the warning indicator lights are off.
Failure to wait the specified time after power has been removed before performing service or repair work can result in death or
serious injury.
Stop the motor.
Disconnect AC mains, permanent magnet type motors, and remote DC-link supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
Wait for the time specified in the Discharge Time tables for the capacitors to discharge fully before performing any service or
repair work.
Measure the voltage level to verify full discharge.
Table 1: Discharge Time
Voltage [V]
Minimum waiting time (minutes)
4
15
20
[hp]
200–240
0.34–5.0
7.5–50
60–100
380–500
1.0–10
15–100
125–200
525–600
1.0–10
15–100
–
525–690
–
–
125–200
WARNING
UNINTENDED START
When the drive is connected to the AC mains, DC supply, or load sharing, the motor may start at any time, causing risk of death,
serious injury, and equipment or property damage. The motor may start by activation of an external switch, a fieldbus command,
an input reference signal from the LCP or LOP, via remote operation using MCT 10 Set-up software, or after a cleared fault condi-
tion.
Press [Off] on the LCP before programming parameters.
Disconnect the drive from the mains whenever personal safety considerations make it necessary to avoid unintended motor
start.
Check that the drive, motor, and any driven equipment are in operational readiness.
CAUTION
INTERNAL FAILURE HAZARD
An internal failure in the drive can result in serious injury when the drive is not properly closed.
Ensure that all safety covers are in place and securely fastened before applying power.
AN354546796134en-000201 / 130R0954 | 5Danfoss A/S © 2021.05
Safety Instructions
VLT®AutomationDrive EZ FC 321
Installation Guide

-
-
-
-
-
-
-
CAUTION
HOT SURFACES
The drive contains metal components that are still hot even after the drive has been powered off. Failure to observe the high
temperature symbol (yellow triangle) on the drive can result in serious burns.
Be aware that internal components, such as busbars, may be extremely hot even after the drive has been powered off.
Do not touch exterior areas that are marked by the high temperature symbol (yellow triangle). These areas are hot while the
drive is in use and immediately after being powered off.
2.5 Lifting the Drive
NOTICE
LIFTING HEAVY LOAD
The weight of the drive is heavy and failure to follow local safety regulations for lifting heavy weights may cause death, personal
injury, or property damage.
Ensure that the lifting equipment is in proper working condition.
Check the weight of the drive and verify that the lifting equipment can safely lift the weight.
Always lift the drive using a lifting bar inserted into the lifting eyes. Maximum diameter for the lifting bar: 20 mm (0.8 in).
The angle from the top of the drive to the lifting cable: 60° or greater.
Test lift the unit approximately 610 mm (24 in) to verify the proper center of gravity lift point. Reposition the lifting point if
the unit is not level.
Table 2: Drive Weights and Dimensions
Enclosure size
Protection rating
Dimensions (HxWxD) [in]
Weight [lb]
A2
IP20/Chassis
10.6x3.6x8.7
10.8
A3
IP20/Chassis
10.6x5.2x8.7
14.6
A5
IP66 - Type 4X
16.6x9.6x7.9
31.5
B1
IP66 - Type 4X
18.9x9.6x10.3
51
B2
IP66 - Type 4X
25.6x9.6x10x3
60
B3
IP20/Chassis
15.8x6.5x9.8
26.5
B4
IP20/Chassis
20.5x9.1x9.6
52
C1
IP66 - Type 4X
26.8x12.2x12.3
99
C2
IP66 - Type 4X
30.4x14.6x13.2
143
C3
IP20/Chassis
21.7x12.2x13
77
C4
IP20/Chassis
26x14.6x13
110
D1h
Type 12
35.5x12.8x14.9
136.7
D2h
Type 12
43.6x12.8x14.9
275.6
D3h
IP20/Chassis
35.8x19.8x14.8
136.7
D4h
IP20/Chassis
44.2x14.8x14.8
238.1
AN354546796134en-000201 / 130R09546 | Danfoss A/S © 2021.05
Safety Instructions
VLT®AutomationDrive EZ FC 321
Installation Guide

-
-
-
-
-
-
-
2.6 Mechanical Installation Precautions
WARNING
EXPLOSIVE ATMOSPHERE
Installing the drive in a potentially explosive atmosphere can lead to death, personal injury, or property damage.
Install the unit in a cabinet outside of the potentially explosive area.
Use a motor with an appropriate ATEX protection class.
Install a PTC temperature sensor to an ATEX PTC-Thermistor device to monitor the motor temperature.
Install short motor cables.
Use sine-wave output filters when shielded motor cables are not used.
2.7 Electrical Installation Precautions
Before you do electrical work on the drive, lock out and tag out all power sources to the drive.
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge equipment capacitors, even with the equipment turned
off and locked out/tagged out. Failure to run output motor cables separately or to use shielded cables could result in death or
serious injury.
Run output motor cables separately or use shielded cables.
Simultaneously lock out/tag out all the drives.
Protective earth connection and RCD requirements
A properly dimensioned protective earth (PE) setup is essential for the safety of the drive system protecting the user against electri-
cal shock. The PE connections of the drive installation ensure that the drive system remains safe preventing that the single fault
currents will generate any hazardous voltages on accessible conductive part, for example, conductive enclosure parts.
The VLT® AutomationDrive EZ FC 321 shall be installed according to the requirement for PE connection and supplementary protec-
tive bonding as specified in IEC/EN 60364-5-54 cl. 543 and 544.
For the automatic disconnection, if there is a fault at the motor side, it shall also be ensured that the impedance of the PE connec-
tion between drive and motor is sufficiently low to ensure compliance with IEC/EN 60364-4-41 cl. 411 or 415. The impedance is
verified by initial and periodic test according to IEC 60364-4-41.
In some regions, extra local requirements apply and must be adhered to.
The suitability for connection of PE and protective bonding of accessible conductive parts according to IEN/EN 60364-5-54 to the
drive is ensured by following the design according to IEC/EN 61800-5-1.
Where the FC 321 is used as a component inside specific applications, special requirement for proper connection to the PE may
apply, for example, IEC/EN 60204 and IEC/EN 61349-1.
AN354546796134en-000201 / 130R0954 | 7Danfoss A/S © 2021.05
Safety Instructions
VLT®AutomationDrive EZ FC 321
Installation Guide

-
-
-
-
-
-
-
-
-
-
-
-
WARNING
ELECTRICAL SHOCK HAZARD - LEAKAGE CURRENT HAZARD >3.5 MA
Leakage currents exceed 3.5 mA. Failure to connect the drive properly to protective earth (PE) can result in death or serious in-
jury.
Ensure reinforced protective earthing conductor according to IEC 60364-5-54 cl. 543.7 or according to local safety regula-
tions for high touch current equipment. The reinforced protective earthing of the can be done with:
a PE conductor with a cross-section of at least 10 mm2(8 AWG) Cu or 16 mm2(6 AWG) Al
an extra PE conductor of the same cross-sectional area as the original PE conductor as specified by IEC 60364-5-54 with a
minimum cross-sectional area of 2.5 mm2(14 AWG) (mechanical protected) or 4 mm2(12 AWG) (not mechanical protected).
a PE conductor completely enclosed with an enclosure or otherwise protected throughout its length against mechanical
damage.
a PE conductor part of a multi-conductor power cable with a minimum PE conductor cross-section of 2.5 mm2(14 AWG)
(permanently connected or pluggable by an industrial connector. The multi-conductor power cable shall be installed with an
appropriate strain relief).
NOTE: In IEC/EN 60364-5-54 cl. 543.7 and some application standards (for example IEC/EN 60204-1), the limit for requiring
reinforced protective earthing conductor is 10 mA leakage current.
WARNING
ELECTRICAL SHOCK HAZARD - LEAKAGE CURRENT
Leakage currents can exceed 5%. Failure to ground the drive properly can result in death or serious injury.
When the leakage currents exceed 5%, the protective earth (PE) shall be oversized by one number according to IEC/EN
60364-5-54 cl. 543.
Ensure that the minimum size of the ground conductor complies with local safety regulations.
WARNING
ELECTRICAL SHOCK AND FIRE HAZARD - RCD COMPLIANCE
The unit can cause a DC fault current in the PE conductor. Failure to use a Type B residual current-operated protective device
(RCD) may lead to the RCD not providing the intended protection and therefore may result in death, fire, or other serious hazard.
When an RCD is used for protection against electrical shock or against fire, only a Type B device is allowed on the supply side.
Other precautions
CAUTION
THERMISTOR INSULATION
Risk of personal injury or equipment damage.
To meet PELV insulation requirements, use only thermistors with reinforced or double insulation.
NOTICE
EXCESSIVE HEAT AND PROPERTY DAMAGE
Overcurrent can generate excessive heat within the drive. Failure to provide overcurrent protection can result in risk of fire and
property damage.
Other protective devices such as short-circuit protection or motor thermal protection between drive and motor are required
for applications with multiple motors.
Input fusing is required to provide short circuit and overcurrent protection. If fuses are not factory-supplied, the installer
must provide them. See 4.11 Fuses and Circuit Breakers for fuse specifications.
AN354546796134en-000201 / 130R09548 | Danfoss A/S © 2021.05
Safety Instructions
VLT®AutomationDrive EZ FC 321
Installation Guide

•
•
-
NOTICE
PROPERTY DAMAGE
Protection against motor overload is not included in the default setting. The ETR function provides class 20 motor overload pro-
tection. Failure to set the ETR function means that motor overload protection is not provided and property damage can occur if
the motor overheats.
Enable the ETR function. See the application guide for more information.
2.8 Safe Operation
When operating the unit, refer to the Programming Guide and Application Guide for guidance and all applicable safety instructions.
The drive is not suitable as the only safety device in the system. Make sure that additional monitoring and protection devices on
drives, motors, and accessories are installed according to the regional safety guidelines and accident prevention regulations.
Keep all doors, covers, and terminal boxes closed and securely fastened during operation.
AN354546796134en-000201 / 130R0954 | 9Danfoss A/S © 2021.05
Safety Instructions
VLT®AutomationDrive EZ FC 321
Installation Guide

•
3 Mechanical Installation
3.1 Connection Tightening Torques
Table 3: Tightening Torque for Cables
Location
Enclosure sizes
A2–A5
B1/B3
B2/B4
C1/C3
C2/C4
D1h/D3h
Mains terminals [in-lb]
4.4–5.3
15.9
39.8
89
124 (up to 3 AWG)
212 (over 3 AWG)
168/335(1)
Motor terminals [in-lb]
4.4–5.3
15.9
39.8
89
124 (up to 3 AWG)
212 (over 3 AWG)
168/335(1)
Ground terminals [in-lb]
–
17.7–26.6
17.7–26.6
17.7–26.6
17.7–26.6
84/169(2)
Brake terminals [in-lb]
4.4–5.3
15.9
39.8
89
124
84
Relay terminals [in-lb]
–
4.4–5.3
4.4–5.3
4.4–5.3
4.4–5.3
4
1Bolt size M10/M12
2Bolt size M8/M10
3.2 Cooling
Ensure that top and bottom clearance for air cooling is provided. See Table 4 for clearance requirements.
a
a
e30bd528.10
Illustration 2: Top and Bottom Cooling Clearance
Table 4: Minimum Airflow Clearance Requirements
Enclosure
A2–A3, A5
B1–B4
C1, C3
C2, C4
D1h–D4h
a [in]
3.9
7.8
7.8
8.9
8.9
AN354546796134en-000201 / 130R095410 | Danfoss A/S © 2021.05
Mechanical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

1.
2.
3.
4.
1.
2.
3.
4.
5.
3.3 Mounting
Procedure
Ensure that the strength of the mounting location supports the unit weight.
The drive allows side-by-side installation.
Place the unit as near to the motor as possible. Keep the motor cables as short as possible.
Mount the unit vertically to a solid flat surface or to the optional backplate to provide cooling airflow.
Use the slotted mounting holes on the unit for wall mount, when provided.
3.3.1 Mounting with Mounting Plate and Railings
A mounting plate is required when mounted on railings.
e30bd504.11
Illustration 3: Proper Mounting with Mounting Plate
3.4 Preparing Cable Entry Holes
Procedure
Remove cable entry from the drive. Avoid that foreign parts fall into the drive when removing the knockouts.
Support the cable entry where the knockout is to be removed.
Remove the knockout with a strong mandrel and a hammer.
Remove burrs from the hole.
Mount the cable entry on the drive.
AN354546796134en-000201 / 130R0954 | 11Danfoss A/S © 2021.05
Mechanical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

•
•
•
•
•
•
•
-
-
-
-
4 Electrical Installation
4.1 EMC-compliant Installation
To obtain an EMC-compliant installation, refer to the wiring schematic (see Illustration 5) and follow the electrical installation in-
structions.
Also, remember to practice the following:
When using relays, control cables, a signal interface, fieldbus, or brake, connect the shield to the enclosure at both ends. If the
ground path has high impedance, is noisy, or is carrying current, break the shield connection on 1 end to avoid ground current
loops.
Convey the currents back to the unit using a metal mounting plate. Ensure good electrical contact from the mounting plate
through the mounting screws to the drive chassis.
Use shielded cables for motor output cables. An alternative is unshielded motor cables within metal conduit.
Ensure that motor and brake cables are as short as possible to reduce the interference level from the entire system.
Provide a minimum 200 mm (7.9 in) separation between mains input, motor cables, and control cables.
For communication and command/control lines, follow the particular communication protocol standards. For example, USB
must use shielded cables, but RS485/ethernet can use shielded UTP or unshielded UTP cables.
Ensure that all control terminal connections are PELV.
NOTICE
TWISTED SHIELD ENDS (PIGTAILS)
Twisted shield ends increase the shield impedance at higher frequencies, which reduces the shield effect and increases the leak-
age current.
Use integrated shield clamps instead of twisted shield ends.
NOTICE
SHIELDED CABLES
If shielded cables or metal conduits are not used, the unit and the installation do not meet regulatory limits on radio frequency
(RF) emission levels.
NOTICE
EMC INTERFERENCE
Failure to isolate power, motor, and control cables can result in unintended behavior or reduced performance.
Use shielded cables for motor and control wiring.
Provide a minimum 200 mm (7.9 in) separation between mains input, motor cables, and control cables.
NOTICE
INSTALLATION AT HIGH ALTITUDE
There is a risk for overvoltage. Isolation between components and critical parts could be insufficient and may not comply with
PELV requirements.
Use external protective devices or galvanic isolation. For installations above 2000 m (6500 ft) altitude, contact Danfoss re-
garding protective extra low voltage (PELV) compliance.
NOTICE
PROTECTIVE EXTRA LOW VOLTAGE (PELV) COMPLIANCE
Prevent electric shock by using PELV electrical supply and complying with local and national PELV regulations.
AN354546796134en-000201 / 130R095412 | Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

e30bf228.11
L1
L2
L3
PE
L1
L2
L3
PE
PE
u
v
w
2
1
3
5
IEC 60309
16
17
18
14
12
8
7
10
9
4
11
13
4
4
6
15
90
+DC
BR-
B
M
AINS
L1 L2 L3
91 92 93
RELA
Y 1 RELA
Y 2
99
- L
C -
UV
W
MO
T
OR
Illustration 4: Example of Proper EMC Installation
AN354546796134en-000201 / 130R0954 | 13Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

1
Programmable logic controller (PLC)
2
Minimum 16 mm2(6 AWG) equalizing cable
3
Control cables
4
Minimum 200 mm (7.9 in) between control cables,
motor cables, and mains cables
5
Mains supply options, see IEC/EN 61800-5-1
6
Bare (unpainted) surface
7
Star washers
8
Brake cable (shielded) – not shown, but same
gounding principle applies as for motor cable
9
Motor cable (shielded)
10
Mains cable (unshielded)
11
Output contactor, and so on.
12
Cable insulation stripped
13
Common ground busbar. Follow local and national
requirements for cabinet grounding.
14
Brake resistor
15
Terminal box
16
Connection to motor
17
Motor
18
EMC cable gland
NOTICE
EMC INTERFERENCE
Use shielded cables for motor and control wiring, and separate cables for input power, motor wiring, and control wiring. Failure
to isolate power, motor, and control cables can result in unintended behavior or reduced performance. Minimum 200 mm (7.9 in)
clearance is required between power, motor, and control cables.
AN354546796134en-000201 / 130R095414 | Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

e30bj012.10
––
Motor
Analog Output
ON=Terminated
OFF=Open
91 (L1)
92 (L2)
93 (L3)
PE
88 (-)
89 (+)
53
(
A IN)
54
(
A IN)
37 (D IN)1)
18 (D IN)
10
V DC
15 mA 130/200 mA
+ - + -
(U) 96
(V) 97
(W) 98
(PE) 99
(P RS485) 68
(N RS485) 69
0 V
5V
S801
0/4–20 mA
RS-485
03
240 V AC, 2 A
24 V DC
02
01
05
04
06
24
V (NPN)
0
V (PNP)
0
V (PNP)
24
V (NPN)
19 (D IN)
24
V (NPN)
0
V (PNP)
24
V
0
V
24 V (PNP)
24
V (NPN)
(D IN/OUT
)
1)
0
V
24
V
29
24
V (NPN)
0
V (PNP)
0
V (PNP)
24
V (NPN)
33 (D IN)
32 (D IN)
1 2
ON
S201
ON
21
S202
ON=0/4–20 mA
95
P 5-00
21
ON
S801
(R+) 82
(R-) 81
: Chassis
240 V AC, 2 A
400 V AC, 2 A
: PE
3-phase
power
input
+10 V DC
DC bus
0/-10 V DC to
+10 V DC
0/4–20 mA
0/-10 V DC to
+10 V DC
0/4–20 mA
50 (+10 V OUT)
55 (COM A IN)
12 (+24 V OUT)
13 (+24 V OUT)
20 (COM D IN)
27 (D IN/OUT)
Switch mode
power supply
Brake
resistor
Relay 1
Relay 2
(COM A OUT) 39
(A OUT) 42
: Ground
: Ground 1
: Ground 2
(COM RS485) 612)
RS485
interface
OFF=0/-10 V DC
to +10 V DC
Illustration 5: Wiring Schematic
4.2 Cable Specifications
NOTICE
WIRE TYPE AND RATINGS
All wiring must comply with local and national regulations regarding cross-section and ambient temperature requirements. For
power connections, minimum 167 °F rated copper wire is recommended.
Table 5: Control Cable Specifications
Type of cable
Maximum cross-section [AWG]
Minimum cross-section [AWG]
Flexible wire without cable end sleeves
16
24
Rigid wire without cable end sleeves
16
24
Flexible wire with cable end sleeves
18
24
Flexible wire with cable end sleeves with collar
20
24
AN354546796134en-000201 / 130R0954 | 15Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

Table 6: Power Cable Sizes for 104 °F Ambient Temperature, 200–240 V and 380–500 V
Enclosure size
Maximum cable size [AWG], mains, motor, brake
A2–A5
12
B1/B3
7
B2/B4
2
C1
1/0
C3
1/0
C2/C4
4/0
D1h/D3h
3/0
D2h/D4h
2x3/0
Table 7: Power Cable Sizes for 104 °F Ambient Temperature, 525–600 V
Enclosure size
Maximum cable size [AWG], mains, motor, and brake
A3/A5
12
B1/B3
7
B2/B4
2
C1
1/0
C3
1/0
C2/C4
4/0
Table 8: Power Cable Sizes for 104 °F Ambient Temperature, 525–690 V
Enclosure size
Maximum cable size [AWG], mains, motor, and brake
D1h/D3h
3/0
D2h/D4h
2x400
4.3 Terminal Descriptions
Table 9: Digital Inputs/Outputs
Terminal
Parameter
Default setting
Description
12, 13
–
+24 V DC
+24 V DC supply voltage for digital inputs and ex-
ternal transducers. Maximum output current
200 mA for all 24 V loads.
18
Parameter 5-10 Terminal 18 Digital In-
puts
[8] Start
Digital inputs
19
Parameter 5-11 Terminal 19 Digital In-
puts
[0] No operation
32
Parameter 5-14 Terminal 32 Digital Input
[0] No operation
33
Parameter 5-15 Terminal 33 Digital Input
[0] No operation
27
Parameter 5-12 Terminal 27 Digital Input
[2] Coast inverse
For digital input or output. Default setting is input.
AN354546796134en-000201 / 130R095416 | Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

1.
Terminal
Parameter
Default setting
Description
29
Parameter Terminal 29 Digital Input
[14] Jog
20
–
–
Common for digital inputs and 0 V potential for
24 V supply.
37
–
Safe Torque Off (STO)
Safe input. Used for STO.
Table 10: Analog Inputs/Outputs
Terminal
Parameter
Default setting
Description
39
–
–
Common for analog output.
42
Parameter 6-50 Terminal 42
Output
Speed 0–high lim-
it
Programmable analog output. 0–20 mA or 4–20 mA at a maxi-
mum of 500 Ω.
50
–
+10 V DC
10 V DC analog supply voltage potentiometer or thermistor.
15 mA maximum.
53
Parameter group 6-1* Analog
Input 1
Reference
Analog input. For voltage or current. Switches A53 and A54 se-
lect mA or V.
54
Parameter group 6-1* Analog
Input 2
Feedback
55
–
–
Common for analog input.
Table 11: Serial Communication
Terminal
Parameter
Default
setting
Description
61
–
–
Integrated RC-filter for cable shield. ONLY for connecting the shield if
EMC problems occur.
68 (+)
Parameter group 8-3* FC Port
Settings
–
RS485 interface. A control card switch is provided for termination re-
sistance.
69 (-)
Parameter group 8-3* FC Port
Settings
–
Table 12: Relays
Terminal
Parameter
Default setting
Description
01, 02, 03
Parameter 5-40 Function Relay [0]
[9] Alarm
Form C relay output. For AC or DC voltage and resistive or in-
ductive loads.
04, 05, 06
Parameter 5-40 Function Relay [1]
[5] Running
4.4 Connecting the Control Cables to the Control Terminals
The control terminal connectors can be unplugged from the drive for convenience when wiring. Either solid or flexible wire can be
connected to the control terminals.
NOTICE
ELECTRICAL INTERFERENCE
Minimize interference by keeping control wires as short as possible and separate from high-power cables.
Strip 10 mm (0.4 in) of the outer plastic layer from the end of the wire.
AN354546796134en-000201 / 130R0954 | 17Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

2.
3.
Insert the control wire into the appropriate terminals.
e30bd546.12
10 mm
(0.4 in)
12 13 18 19 27
29 32 33
Pull gently on the wire to ensure that the contact is firmly established.
Loose control cable can cause equipment faults or reduced performance.
4.5 Start/Stop
Terminal 18 = Parameter 5-10 Terminal 18 Digital Input [8] Start.
Terminal 27 = Parameter 5-12 Terminal 27 Digital Input [0] No operation (Default [2] Coast inverse).
Terminal 37 = Safe Torque Off.
12 13 18 37
e30ba155.12
322719 29 33 20
P 5-12 [0] P 5-10 [8]
Start/Stop
+24V
Speed
Safe Stop
Start/Stop
[18]
Illustration 6: Start/Stop
4.6 Pulse Start/Stop
Terminal 18 = Parameter 5-10 Terminal 18 Digital Input [9] Latched start.
Terminal 27 = Parameter 5-12 Terminal 27 Digital Input [6] Stop inverse.
Terminal 37 = Safe Torque Off.
AN354546796134en-000201 / 130R095418 | Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide

12
13
18 37
e30ba156.12
32
2719
29 33 20
P 5 - 12 [6]
P 5 - 10[9]
+24V
Speed
Start
Stop inverse Safe Stop
Start (18)
Start (27)
Illustration 7: Pulse Start/Stop
4.7 Speed Up/Speed Down
Terminal 18 = Parameter 5-10 Terminal 18 Digital Input [8] Start.
Terminal 27 = Parameter 5-12 Terminal 27 Digital Input [19] Freeze reference.
Terminal 37 = Safe Torque Off.
Terminal 29 = Parameter 5-13 Terminal 29 Digital Input [21] Speed up.
Terminal 32 = Parameter 5-14 Terminal 32 Digital Input [22] Speed down.
12
18
27
29
32
37
+24V
Par. 5-10
Par. 5-12
Par. 5-13
Par. 5-14
e30ba021.13
Illustration 8: Speed Up/Speed Down
AN354546796134en-000201 / 130R0954 | 19Danfoss A/S © 2021.05
Electrical Installation
VLT®AutomationDrive EZ FC 321
Installation Guide