NXS
Three Contactor Bypass Assemblies
INSTALLATION INSTRUCTIONS
APPLICATION
WIRING
The NXS Three Contactor Bypass Assemblies channel
electrical power either through or around the variable
frequency drive (VFD).
CAUTION
Equipment Damage Hazard.
Can short equipment circuitry.
Disconnect power supply before installation.
INSTALLATION
When Installing This Product…
1.
2.
3.
4.
Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
Installer must be a trained, experienced service
technician.
After installation is complete, check out product
operation as provided in these instructions.
WARNING
Can Cause Serious Injury or Death.
Installation requires work with high voltage.
Disconnect power supply before installation.
CAUTION
Equipment Damage Hazard.
Can short equipment circuitry.
Disconnect power supply before installation.
Location and Mounting
Locate the device in a clean, dry, well-ventilated area with an
ambient temperature below 125°F (52°C).
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
1.
2.
Ensure that bypass box voltage corresponds with that of
the power supply.
To access the wiring compartment:
a. Ensure handle is in the OFF position.
b. Rotate latch 3/4-turn counterclockwise.
c. Open the cover.
IMPORTANT
Use only copper wire with 167°F (75°C)
minimum.
3.
4.
Refer to Fig. 1 for typical wiring.
If you intend to use the bypass box to manually operate
the motor, set the motor overload dial to the motor full
load amp (FLA) rating.
OPERATION
Bypass boxes have four operating positions:
• VFD: Device directs power to VFD first, then to the motor.
VFD controls the motor as it would without the bypass box.
• OFF: Device stops power. Power reaches neither the
motor nor the VFD.
• TEST: Device directs power to VFD only. This allows for
VFD calibration, adjustments, and diagnostics.
• BYPASS: Device directs power to motor only. No power
reaches the VFD. The motor operates at full speed with full
power.
62-0184
NXS THREE CONTACTOR BYPASS ASSEMBLIES
Operation Using the VFD
VFD Bypass
To set bypass box to use VFD to control the motor as it would
without the bypass box:
1. Stop the motor.
2. Wait five seconds.
3. Rotate handle to DRIVE.
4. Start the VFD (see VFD instructions for details).
To set bypass box to direct power only to motor:
1. Rotate handle from VFD to OFF.
2. Wait five seconds.
IMPORTANT
Switching the bypass box control handle to BYPASS
can immediately turn the motor on.
3.
62-0184
2
Rotate handle to BYPASS.
3
OL
2
2
1
1
10
SEE NOTE 5
11
AMP
MAIN DISC.
AMP.
JUMPER
GND
L3
L2
L1
12
2
000X
2
0X00
X000
VFD
3
2
7
4
BYPASS
X1
T114
VA
AMP
OFF TEST
13
CUSTOMER SUPPLIED
EXTERNAL START
1A
VAC
3 PH
60 HZ
CUSTOMER
SUPPLIED
AMP
M3AUX
M2AUX
X1
H1
X2
M2
7
8
TCR
X2
X2
X2
X2
X2
TCR
M3
M1
ACR
VAC
SECONDARY
6
M3
BYPASS RUN
BYPASS
CONTACTOR
TEST CONTROL
RELAY
VFD RUN
INPUT
CONTACTOR
OUTPUT
CONTACTOR
AUTO START
RELAY
TRANSFORMER
FUSING
VA PRI SEC
100 1/2A 1-1/4A
150 1/2A 2A
9
8
4
5
TCR
X4
H4
AMP
W2
W1
GND
RELAY OUTPUT2
NXOPTA2
RELAY OUTPUT1
R01/1
R01/2
R01/3
R02/1
R02/2
R02/3
21
22
23
24
25
26
NXOPTA1
REFERECE VOLTAGE
+10Vref 1
AI, 0– +10V; 0–20ma
AI+ 2
AI common
GND/AI1– 3
AI, 0–20ma; 0– +10V
AI2+ 4
AI COMMON
GND/A12– 5
24V AUXILIARY VOLTAGE
24Vout 6
I/O GROUND
GND 7
DIGITAL INPUT 1 *
DIN1 8
DIGITAL INPUT 2 *
DIN2 9
DIGITAL INPUT 3 *
DIN3 10
DI COM A FOR DIN1–DIN3
CMA 11
24V AUXILIARY VOLTAGE
24Vout 12
I/O GROUND
GND 13
DIGITAL INPUT 4
DIB4 14
DIGITAL INPUT 5
DIB5 15
DIGITAL INPUT 6
DIB6 16
DI COM B FOR DIB4–DIB6
CMB 17
ANALOG SIGNAL +OUT
A01+ 18
ANALOG OUTPUT COM
A01– 19
OPEN COLLECTOR OUTPUT
D01 20
V2
V1
GND
U2
U1
HONEYWELL NXS
19
20
18
16
10
11
12
13
14
15
0L
TO
T114
T3
T2
T1
T1
T2
T3
SP
X2
X2
1
2
3
4
5
6
7
8
9
10
11
12
13
TO
MOTOR
REFERECE VOLTAGE
ANALOG 0– +10V; 0–20ma
ANALOG common
ANALOG 0–20ma; 0– +10V
ANALOG COMMON
24V OUT
I/O GROUND
RELAY OUTPUT N.O.
RELAY OUTPUT N.O.
EXTERNAL FAULT
EXTERNAL FAULT
EXTERNAL START
EXTERNAL START
CUSTOMER TERMINALS
M
CUSTOMER
MOTOR
M20992
1. DEFAULT: BASE APPLICATION: DIN1 – START FORWARD,
DIN2 – START REVERSE, DIN3 – RUN ENABLE
2. DASH LINES INDICATE CUSTOMER INSTALLED DEVICES AND WIRING.
3. COPPER WIRE RATED FOR 60 C INSULATION IF RATED LESS THAN
100A OR 75 C IF RATED 10A OR MORE MUST BE USED.
4. REFER TO INSTALLATION MANUAL FOR TIGHTENING TORQUE VALVES.
5. REPLACE JUMPER WITH EXTERNAL FAULT.
* NOTES
M2AUX
ACR
M1
M2
NXS THREE CONTACTOR BYPASS ASSEMBLIES
Fig. 1. NXS wiring.
62-0184
NXS THREE CONTACTOR BYPASS ASSEMBLIES
Table 1. NXS NEMA1 Assembly Dimension Details.
Model
Number
UNISTRUT
D
A
B
B
C
M20991
Fig. 2. Dimensions of the NXS NEMA1 Assemblies.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
62-0184
B.B. 3-03
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Weight
HP (lbs)
NXS0015J
1.5 53
NXS0020J
2
NXS0030J
3
NXS0040J
4
NXS0050J
5
A
B C D Motor Terminal
Torque Rating Volts
(inches)
(lb-in.)
AC
33-1/2 16 7 5 18 - 20
NXS0075J
7.5 68
NXS0100J
10 70
NXS0150J
15 70
37-1/2 16 9
NXS0200J
20 98
41-1/2 20
NXS0250J
25 98
41-1/2 20 9 5 32 -35
NXS0300J
30 98
46-1/2
NXS0400J
40 150
46-1/2 24
NXS0500J
50 150
46-1/2 24 9 6 45 - 50
NXS0600J
60 150
49-1/2
NXS0010S
1
33-1/2 16 7 5 18 - 20
NXS0015S
1.5
NXS0020S
2
NXS0030S
3
NXS0040S
4
NXS0050S
5
NXS0075S
7.5 70
53
480
230
68
70
33-1/2
37-1/2 16 9
NXS0100S
10 98
41-1/2 20
NXS0150S
15 98
41-1/2 20 9 5 32 -35
NXS0200S
20 150
46-1/2 24
NXS0250S
25 150
46-1/2 24 9 6 45 - 50
NXS0300S
30 150
49-1/2
NXS0010K
1
33-1/2 16 7 5 18 - 20
NXS0015K
1.5
NXS0020K
2
NXS0030K
3
NXS0040K
4
NXS0050K
5
NXS0075K
7.5 98
41-1/2 20 9
NXS0100K
10 98
41-1/2 20 9 5 32 -35
NXS0150K
15 150
46-1/2 24
NXS0200K
20 150
46-1/2 24 9 6 45 - 50
NXS0250K
25 150
49-1/2
NXS0300K
30
53
200 /
208
68
70
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