Fireye FX Series User manual

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© 2022 Carrier 1
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NEX-3001
January 18, 2022
Fireye FX Series
Modbus Controlled Actuator /Servo
Installation and Wiring
DESCRIPTION
This bulletin describes the installation and operating instructions for the FX series of servo motors.
These come in three sizes: FX04 (4Nm/3ft.-lb.), FX20 (20Nm/15ft.-lb.) and FX50 (50Nm/37ft.-lb.).
There are available in two baud rates: 56k for use with the NXF4000 or PPC4000 parallel positioning
system or 19.2k for general use with a PLC or other Modbus client. The FX04 size is also available in
a 38.4k baud rate for general use with a PLC or other Modbus client. Only the 56k model is approved
for use as part of a protective system (when used with the NXF4000 or PPC4000).
These servos are not compatible with or approved as replacements for the 945 series of
servos.
SAFETY INFORMATION
WARNING: When this equipment is mounted onto an appliance, all external
timers/controllers must be listed or recognized components and approved by
national certification agencies for the purpose for which they are used and
approved for use by a local authority who has jurisdiction.
WARNING
–
EXPLOSION HAZARD. DO NOT CONNECT OR DISCONNECT
WHEN ENERGIZED.
SYSTEM INFORMATION
The Fireye FX series servo motors are precision actuators designed to accurately position valves and
dampers. The servo motor interprets Modbus commands from an external control and uses a stepper
motor to drive to the commanded position.
The FX series servo motors offers maximum output torque ratings of 4Nm/3ft.-lb., 20Nm/15ft.-lb. or
50Nm/37ft.-lb. The fastest available travel time is 30 seconds for 90 degrees of rotation. The slowest
travel time available varies by size. Maximum rotation angle of the drive shaft is 100 degrees.
The servo is designed to be applied to drive any type of flow control valve or damper as long as the
output torque is suited to the application.
Before attempting to install, commission or operate this equipment all relevant sections of this document
must be read and fully understood, failure to follow them could damage the product or cause a hazardous
condition. If in doubt about any requirements consult the supplier.
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Check the ratings in the following instructions to ensure the product is suitable for your application.
Installation, commissioning or adjustment of this product MUST be carried out by personnel qualified by
local, state, regional or national requirements.
After installation is complete, check the product operation is as described in these instructions.
The manufacturer of this equipment accepts no liability for any consequences resulting from
inappropriate, negligent or incorrect installation, commissioning or adjustment of operating parameters of
the equipment.
These mounting and operating instructions are intended to give the knowledge which is necessary to
carry out the mounting and adjustment of FX series servo motor safely and correctly.
NOTE: The manufacturer of this equipment has a policy of continual product improvement and reserves
the right to change the specification of the equipment and the contents of this manual without notice.
TECHNICAL DATA FX04 VERSIONS
Fastest actuating time for 90° angle of rotation: 30 seconds
Slowest actuating time for 90° angle of rotation: 126 seconds
Nominal torque: 4Nm/3ft.-lb.
Maximum angle of rotation: 100°
Nominal voltage 24 VDC ± 10%
Nominal power consumption: 5W nominal, 7.5W peak
Angle of rotation limited by: Firmware
Degree of protection: NEMA 4 IP 65 (see note below)
Installation orientation: Any
Working temperature range: -4°F to +140°F (-20°C to +60°C)
Duty cycle: 100%
Weight: 2.27 lb. / 1.03 kg.
Note: For models without quick disconnect fittings, suitable conduit fittings that meet the desired
protection are supplied by the application.

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TECHNICAL DATA FX20 VERSIONS
Fastest actuating time for 90° angle of rotation: 30 seconds
Slowest actuating time for 90° angle of rotation: 368.4 seconds
Nominal torque: 20Nm/15ft.-lb.
Maximum angle of rotation: 100°
Nominal voltage 24 VDC ± 10%
Nominal power consumption: 15W nominal, 35W peak
Angle of rotation limited by: Firmware
Degree of protection: NEMA 4 IP 65 (see note below)
Installation orientation: Any
Working temperature range: -4°F to +140°F (-20°C to +60°C)
Duty cycle: 100%
Weight: 5.43 lb. / 2.46 kg.
Note: For models without quick disconnect fittings, suitable conduit fittings that meet the desired
protection are supplied by the application.
TECHNICAL DATA FX50 VERSIONS
Fastest actuating time for 90° angle of rotation: 30 seconds
Slowest actuating time for 90° angle of rotation: 202.1 seconds
Nominal torque: 50Nm/37ft.-lb.
Maximum angle of rotation: 100°
Nominal voltage 24 VDC ± 10%
Nominal power consumption: 20W nominal, 38W peak
Angle of rotation limited by: Firmware
Degree of protection: NEMA 4 IP 65 (see note below)
Installation orientation: Any
Working temperature range: -4°F to +140°F (-20°C to +60°C)
Duty cycle: 100%
Weight: 6.10 lb. / 2.77 kg.
Note: For models without quick disconnect fittings, suitable conduit fittings that meet the desired
protection are supplied by the application.

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ORDERING INFORMATION
Servos for NXF4000/PPC4000 Parallel Positioning System (56k Baud) Bulletin
FX04 Servo motor, 24 VDC operation, 4Nm, 3 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 56k baud for NXF4000/PPC4000
NEX-3001
FX04-1 Servo motor, 24 VDC operation, 4Nm, 3 ft.lb. torque, quick disconnect connectors,
minimum travel time of 30 seconds for 90°, 56k baud for NXF4000/PPC4000
FX20 Servo motor, 24 VDC operation, 20Nm, 15 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 56k baud for NXF4000/PPC4000
FX20-1
Servo motor, 24 VDC operation, 20Nm, 15 ft.lb. torque, quick disconnect
connectors, minimum travel time of 30 seconds for 90°, 56k baud for
NXF4000/PPC4000
FX50 Servo motor, 24 VDC operation, 50Nm, 37 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 56k baud for NXF4000/PPC4000
FX50-1
Servo motor, 24 VDC operation, 50Nm, 37 ft.lb. torque, quick disconnect
connectors, minimum travel time of 30 seconds for 90°, 56k baud for
NXF4000/PPC4000
Servos for PLC or General Modbus Use (19.2k, 38.4k Baud) Bulletin
FX04-19 Servo motor, 24 VDC operation, 4Nm, 3 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 19.2k baud for PLC control
NEX-3001
FX04-119 Servo motor, 24 VDC operation, 4Nm, 3 ft.lb. torque, quick disconnect connectors,
minimum travel time of 30 seconds for 90°, 19.2k baud for PLC control
FX04-38 Servo motor, 24 VDC operation, 4Nm, 3 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 38.4k baud for PLC control
FX04-138 Servo motor, 24 VDC operation, 4Nm, 3 ft.lb. torque, quick disconnect connectors,
minimum travel time of 30 seconds for 90°, 38.4k baud for PLC control
FX20-19 Servo motor, 24 VDC operation, 20Nm, 15 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 19.2k baud for PLC control
FX20-119 Servo motor, 24 VDC operation, 20Nm, 15 ft.lb. torque, quick disconnect
connectors, minimum travel time of 30 seconds for 90°, 19.2k baud for PLC control
FX50-19 Servo motor, 24 VDC operation, 50Nm, 37 ft.lb. torque, ½” NPT conduit threaded,
minimum travel time of 30 seconds for 90°, 19.2k baud for PLC control
FX50-119 Servo motor, 24 VDC operation, 50Nm, 37 ft.lb. torque, quick disconnect
connectors, minimum travel time of 30 seconds for 90°, 19.2k baud for PLC control
Premade Quick Disconnect Cord Sets Bulletin
59-565-6 Quick disconnect cord set, 6 feet, PVC jacket, temperature rating -40°C to 105°C,
meets NEMA 1,3,4,6P and IEC67 133-748
59-565-40 Quick disconnect cord set, 6 feet, PVC jacket, temperature rating -40°C to 105°C,
meets NEMA 1,3,4,6P and IEC67
Connectors and Cable Bulletin
129-192 Quick disconnect connector for field wiring, female (cable 59-565 recommended) 133-747
129-194 Quick disconnect connector for converting servos, male n/a
59-565 Cable, twisted pair with drain wire, 2 power wires, suitable for servo hookup n/a

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SAFETY ADVICE
Device safety
The servo motor must only be used for purposes corresponding to its construction and within the values
specified in the technical data.
The installer should be satisfied that no potential hazards will be produced for any devices or machines
involved as a result of the installation or commissioning.
Before mounting the servo motor, check the free movement of the connected valve, damper or other
device.
After completing the mounting and adjustment, check the correct functioning of the servo motor.
Safety advice for mounting and adjustments
The installer must be satisfied that no potential hazards will be produced for personnel or the environment
as a result of the installation or commissioning.
After completing adjustments, check the correct functioning of the servo motor.
Check that any safety devices are functioning correctly.
Carry out adjustments only in accordance with the instructions described in this document.
Adjustments must be carried out only by a licensed or a qualified person having adequate training, who is
aware of potential hazards.
Wiring
Five wires must be connected to power and communicate with the servo. Quick disconnecting cord sets
are available for the FX04-1, FX04-119, FX04-38, FX04-138, FX20-1, FX20-119, FX50-1 and FX50-119.
Quick disconnect fittings and cable are available for field construction and installation using the ½” NPT
fitted models. Be sure to connect the ground connection first to eliminate any ESD (electrostatic
discharge) potential.

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SERVO MOTOR DIAGRAM
FX04 (FX04-1/FX04-119/FX04-138 with quick disconnects shown) diagram
FX20 (FX20-1/FX20-119 with quick disconnects shown) diagram
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90°
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90°

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FX50 (FX50-1/FX50-119 with quick disconnects shown) diagram
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DIMENSIONS
FX04 dimensions

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FX20 dimensions

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FX50 dimensions

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INSTALLATION
WARNING – All installation, service and troubleshooting of Fireye products must be
performed by a qualified technician!
Fasten the FX servo motor using bolts through a suitable mounting so that the mounting surface
rests flat. The FX04 has four 5mm through-holes for mounting with nuts/bolts. The FX20 has four
6mm through-holes for mounting with nuts/bolts. The FX50 has two threaded options: (4) M6 x
13mm or (4) M8 x 13mm. For the FX50, both are in a square pattern around the shaft to allow
clocking the position by 90°.
The output drive shaft should be connected using a suitable arm, link, flexible coupling or D-hole
couplings in order to assure a secure connection.
The FX series servo can be mounted in any orientation. Ensure that the installation has future service
accessibility.
Class I Division 2 Hazardous Location requires that suitable wiring methods shall be used which meet the
applicable requirements.
QUICK DISCONNECT CORD SETS
Cord sets having female connectors on both ends are available in 6 foot (59-565-6) and 40 foot (59-565-
40) lengths.
Class I Division 2 Hazardous Location requirements for FX series servos with electrical connectors state
that the coupling nut must be tightened after mating the cable to the servo.
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3
FEMALE END VIEW
4
5
2
1
1 = BROWN
2 = BLACK
3 = DRAIN
4 = ORA NGE
5 = RED

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QUICK DISCONNECT FIELD WIRING
Quick disconnect connectors are available in kit form for field wiring, 129-192. Fireye recommends cable
part number 59-565 to be used for servo wiring.
As shown above the cable strip length is specified at 30 mm (1.2 in) and each wire strip length is 7 mm
(0.275 in).
To use cable 59-565, strip one end as specified. Strip each wire and wire to connector as shown in the
image and table below:
Terminal designations
Terminal Description Color (59-565 cable)
1 Modbus B(-) Brown
2 24VDC common Black
3 Earth ground Drain (bare)
4 Modbus A(+) Orange
5 24VDC power Red

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FIELD WIRING USING FIXED CABLE OR CONDUIT
Loosen the four housing cover screws and pull the cover up to remove. For the electrical installation of
the FX series servo motor, use the prescribed cable type corresponding to the environmental conditions.
Feed cables through suitable conduit and place the stripped ends of the leads into screw connection
terminals and terminate. Cable type 59-565 contains a drain wire, and care should be taken when routing
this to terminal 3. Tubing should be placed over this bare wire. Wire ends should be properly stripped
such that no bare wires protrude from the terminals and thus produce the risk of a current surge or a short
circuit.
Store the cables such that they are not pinched when the housing cover is fitted. Also ensure that there is
not any interfere with the internal end travel switch mechanism or potentiometer coupling shaft.
There are two terminals for each connection in the FX04 and FX20 to make it easier to wire the servos in
a serial or daisy-chain as recommended by the RS-485 standard. The FX50 has larger terminals
designed to accommodate two wires each.
Below is a table showing the descriptions of the terminals. For the 59-565 cable, the black and red wires
are 18AWG and the brown and orange wires are a twisted pair.
Terminal designations
Terminal Description Color (59-565 cable)
1 Modbus B(-) Brown
2 24VDC common Black
3 Earth ground Drain (bare)
4 Modbus A(+) Orange
5 24VDC power Red

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FX04 terminal layout

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FX20 terminal layout

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FX50 terminal layout
ADJUSTMENTS/COMMISSIONING
Adjustments
Before the servo motor is opened or commissioned, the Safety Information and Safety Advice sections
must be read. The cover must be removed to make the following adjustments.
Unit address
The servos use the Modbus communication protocol via RS485. For the models FX04, FX04-1, FX20,
FX20-1, FX50 and FX50-1, the baud rate is 56k. For most devices, a baud rate of 57.6k is within the
tolerance of the internal UART and communication will be possible. For the models FX04-19, FX04-119,
FX20-19, FX20-119, FX50-19 and FX50-119, the baud rate is 19.2k. For the models FX04-38, FX04-138
the baud rate is 38.4k. For all models, the format is fixed to eight data bits, no parity and one stop bit (8,
N, 1).
Each servo connected must have its own unique unit address. Before applying power, use the rotary
switch (location shown in Servo Motor Diagram section or on image below) to select the unit address. The
address is selectable from 1 through 10 (10 is represented as 0 on the switch). If the unit address is
changed, a power cycle is necessary since the address is only read from the switch at power-up.
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CW
CCW
3 5 2 4 1

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Manual movement
The servo can be moved manually by using the two red buttons (location shown in Servo Motor Diagram
section or on image below) whenever power is applied to the servo. There are separate buttons for CW
and CCW movement. The servo will automatically stop when it reaches the end of available travel. Note
that if Modbus commands are actively setting the position, the manual movement buttons will not override
those commands – the position will immediately return to the commanded Modbus position. Pausing
those Modbus commands will allow for manual movement.
Replace the servo cover after selecting the unit address and when finished making manual movements.
Cover off, showing location of address selection rotary switch and manual movement pushbuttons

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MODBUS CONTROL SPECIFICS
Read values
Use function code 03 (read 4x or holding registers) for reading Modbus data. When reading values, any
register valid for the write operation can be selected as the starting address. The length is what
determines how much information is presented. Note that addresses shown begin at 0.
Read registers
Starting
address
FX04
Starting
address
FX20
Starting
address
FX50
Register
in
sequence
Description of data Range
any 1-30 any 1-61 any 1-60 1st Commanded position in angular degrees x10 3 to 1100
(65535 indicates error)
any 1-30 any 1-61 any 1-60 2nd Current servo position in angular degrees x10 3 to 1100
any 1-30 any 1-61 any 1-60 3rd
bits 0-7
Tweak mode error percent and rotation
direction
-100 to 100
0 indicates no error
CW: positive value
CCW: negative value
any 1-30 any 1-61 any 1-60 3rd
bits 8-15
Current servo speed and rotation direction,
higher value is faster
Note: The value corresponds to the write
address used
FX04: -30 to 30
FX20: -61 to 61
FX50: -60 to 60
0 indicates stationary
CW: positive value
CCW: negative value
any 1-30 any 1-61 any 1-60 4th
bits 0-5
Error code
Note: See Error Codes section
0 to 14
0 indicates no error
any 1-30 any 1-61 any 1-60 4th
bit 6 CW or CCW button pressed 0 or 1
any 1-30 any 1-61 any 1-60 4th
bit 7 Tweak mode active 0 or 1
any 1-30 any 1-61 any 1-60 4th
bits 8-15 Servo torque rating in Nm 4, 20 or 50
any 1-30 any 1-61 any 1-60 5th Linearity error since last command in angular
degrees x10 -100 to 100
any 1-30 any 1-61 any 1-60 6th Firmware revision Read in hex
Tweak mode
Tweak mode in an internal process used for fine adjustment of the position when the servo is near the
commanded position. The information is provided read-only – no adjustments are possible.
Linearity error
The linearity error is the difference between what the potentiometer is reading and how far the motor
should have moved. An error is normal due to time lag as well as the inherent non-linearity of the
potentiometer. This will normally be within one angular degree (value between -10 and 10). The
information is provided read-only – no adjustments are possible.

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Error codes
Sending a commanded position to the servo will erase/reset the present error code. It should be your
normal process to read the servo before sending a new commanded position so that any detected errors
will not be missed. In addition, once an error is detected, the servo will stop moving and release any
braking feature. The servo will remain in an error state as long as power is not recycled or a commanded
position is not sent.
Error codes
Error Code Description Possible Remedies
0 No error
1-7 Internal CPU self-check error Re-write the commanded position. Log when error
occurred to determine frequency of error.
8 Servo shaft is not moving as expected
The shaft is jammed or the actuator is undersized for
the application. Check linkage for binding or
lubrication problems.
The supply voltage is too low or the motor may be
extremely hot.
9-10 Voltage regulator self-check error Re-write the commanded position. Log when error
occurred to determine frequency of error.
11
Under voltage – below 21.6VDC Power cable is too long or gauge of wire is too small.
Power supply may also not be able to handle the
load.
Measure power supply and/or monitor power supply
voltage at actuator to determine where the problem
lies.
12
Over voltage – above 33VDC Measure the power supply voltage to ensure that
voltage is not set too high.
Inductive or capacitive coupling may cause spikes on
supply line. Separate actuator power supply lines from
other high power lines.
13-14 Internal current regulation faulty Re-write the commanded position. Log when error
occurred to determine frequency of error.
Write values
Use function code 06 (write single 4x or holding register) for writing Modbus data. Note that function code
16 (write multiple 4x or holding registers) will not work, even if the length is specified to be one address.
Note that addresses shown begin at 0.
The register written to determines the speed at which the servo will move. Writing to register
1 (40002) will move the servo at its slowest speed. Writing to register 2 (40003) will move the servo
slightly faster. The higher the register number, the faster the servo will move up. The servo will move at
the fastest speed (90 degrees in 30 seconds) at a different register for each model – see the write table in
this section for a listing of all the registers and their corresponding speeds. Writing to a register higher
than then model of servo supports will result in a Modbus exception to be returned to the Modbus
controller. The number written to the register can range from 0 to 1100 representing the full range of the
servo (110 degrees) in tenths of a degree. For example, writing a 450 to register 30 (40031) on an FX04
will cause the servo to go to the 45.0 degree position at the maximum speed. Note that while a position of
0 can be commanded, the lowest position that can be reached is 3 (0.3 angular degrees).
A new position or speed can be sent at any time. The user does not have to wait for the servo to reach
the previous commanded position before issuing a new position.

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Write registers
Register Register (4x) FX04 Travel Time in Seconds FX20 Travel Time in Seconds FX50 Travel Time in Seconds
1 40002 126 368.4 202.1
2 40003 114 310.1 172.1
3 40004 104 267.7 148.2
4 40005 95 235.6 130.1
5 40006 88 210.3 116.4
6 40007 81 189.9 105.8
7 40008 76 173.2 97.4
8 40009 71 159.1 90.6
9 40010 67 147.2 84.9
10 40011 63 136.9 80.1
11 40012 30 127.9 76.0
12 40013 57 120.1 72.4
13 40014 54 113.2 69.3
14 4001552 107.0 66.5
15 4001650 101.5 64.0
16 4001748 96.5 61.7
17 4001846 91.9 59.7
18 4001944 87.8 57.8
19 40020 42 84.1 56.1
20 40021 41 80.6 54.6
21 40022 39 77.4 53.1
22 40023 38 74.5 51.8
23 40024 37 71.8 50.5
24 40025 36 69.2 49.4
25 40026 35 66.8 48.3
26 40027 34 64.6 47.2
27 40028 33 62.6 46.3
28 40029 32 60.6 45.4
29 40030 31 58.8 44.5
30 40031 30 57.1 43.7
31 40032 invalid 55.5 42.9
32 40033 invalid 54.0 42.2
33 40034 invalid 52.5 41.5
34 40035 invalid 51.2 40.8
35 40036 invalid 49.8 40.1
36 40037 invalid 48.6 39.5
37 40038 invalid 47.4 39.0
38 40039 invalid 46.3 38.4
39 40040 invalid 45.2 37.9
40 40041 invalid 44.2 37.3
41 40042 invalid 43.3 36.8
42 40043 invalid 42.3 36.4
43 40044 invalid 41.4 35.9
44 40045 invalid 40.6 35.5
45 40046 invalid 39.7 35.0
46 40047 invalid 38.9 34.6
47 40048 invalid 38.2 34.2