TAC Forta M400
G-40-22
Actuator for Valves
M400 is an electro-mechanical actuator for the control of
two-way and three-way plug valves in:
• heating systems
• air handling systems
M400 is primarily designed for applications where the
demands on actuator speed and thrust are small.
The actuator can not be equipped with Self Testing
Device STS.
M400 is either controlled by an increase/decrease signal
or by a modulating 0–10 V control signal.
The electronic circuitry of the actuator ensures that the
running time is the same, regardless of the stroke of the
valve in question.
It is easy to mount and connect the actuator. It can be
mounted directly onto TAC’s control valves, without any
mounting kit.
20 Nov 2006
For Satchwell valves a linkage is included (see PART
NUMBERS on page 2)
The working range of the actuator is adjusted
automatically depending on the stroke of the valve. The
electronic circuitry of the actuator then takes care of the
adjustment of the valve end positions.
The actuator is supplied by 24 V AC. It can provide a
position indicator signal 2-10 V and a 16 V DC voltage
supply for older TAC controllers.
TECHNICAL DATA, M400
Part numbers ........................ see the table on the next page
Supply voltage ..................24 V AC +25%/ -35%, 50–60 Hz
Power consumption ......................................... average 6 VA
Transformer sizing ........................................................ 30 VA
Running time:
Modulating .................................................................... 60 s
Increase/decrease ............................................ 300 s/60 s
Stroke ............................................ 9–32 mm (0.35 - 1.26 in.)
Factory set stroke .................................... 20 mm (0.79 in.)
Thrust ................................................................400 N (90 lbf)
Duty cycle ........................................... max. 20%/60 minutes
Analog input:
Voltage ..................................................................... 0–10 V
Impedance ........................................................ min 100 kΩ
Digital inputs VH–VC:
Voltage across open input .................................... 24 V AC
Current through closed input ..................................... 5 mA
Pulse time ..........................................................min. 20 ms
Output G1:
Voltage ....................................................... 16 V DC ±0.3 V
Load............................................ 25 mA, short-circuit proof
Output Y:
Voltage ..................................................... 2-10 V (0-100%)
Load ............................................................................ 2 mA
Ambient temperature:
Operation .............................. –10 – +50 °C (14°F - 122°F)
Storage ..................................–10 – +50 °C (14°F - 122°F)
Ambient humidity ..............................................max. 90% RH
Enclosure rating ............................................................. IP 54
Sound power level............................................. max. 32 dBA
Standards:
Emission ................................................. EN 50081-1:1992
Immunity ................................................. EN 50082-1:1992
Heat ................................................................... IEC-68-2-2
Humidity ............................................................ IEC-68-2-3
Cold ................................................................... IEC-68-2-1
Vibration ............................................................ IEC-68-2-6
Material:
Housing ............................................................... aluminium
Cover .......................................................... ABS/PC plastic
Color.............................................................. aluminium/black
Weight ............................................................. 1.8 kg (3.96 lb)
Dimensions ..................... refer to the table on the next page
1 (6) 0-003-2060-5 (EN)Subject to change.
PART NUMBERS
Designation Explanation Part number
M400 modulating control signal or increase/decrease signal 880-0230-030
M400-S2 modulating control signal or increase/decrease signal and end point 880-0231-030
switches
M400 + L2SV modulating control signal or increase/decrease signal, including a linkage for 880-0620-000
Satchwell valves
M400-S2 + L2SV modulating control signal or increase/decrease signal and end point switches, 880-0621-000
including a linkage for Satchwell valves
DIMENSIONS
FUNCTION
The actuator
The brushless DC-motor of the actuator
turns a screw via a gear wheel. The
motor receives a control signal from a
controller. The screw gets a linear
movement which moves the stem of the
valve.
Control signal
M400 can either be controlled by an
increase/decrease signal or by a
variable direct voltage.
If an increase/decrease signal is used,
the actuator normally moves inwards on
an increase signal and outwards on a
decrease signal, see Settings.
Manual operation
There is a manual operation handle on
the actuator, see figure 2. When it is
lowered, the motor stops. Then, the
actuator can be operated manually if
the handle is turned.
Position feedback
Forta actuators are equipped with a 2–
10 V DC position feedback signal,
where 2 V always corresponds to the
closed position and 10 V to the open
position (depending of switch nr. 1).
End point switches
When actuators are controlled in
sequence, it is possible to use the end
point switches that have set positions.
They will toggle when the valve is fully
open or fully closed, respectively.
Figure 1
Manual
operation
handle
Figure 2
0-003-2060-5 (EN) 2 (6)
MOUNTING
The actuator may be mounted
horizontally, vertically and in any
position in between, but not upside
down, see figure 3.
N.B.! Do not use the actuator for the
DN15 valves V298, V282, V294, V384,
V386 and V394.
To mount the actuator on a valve, slide
the actuator onto the valve neck, thus
making the square nut on the valve
spindle fit into the groove on the cross
bar. Then slide the brace into the
groove on the valve neck and secure
the nuts.
CONNECTIONS
Figure 3
Block Function Description
G 24 V AC Supply
G0 24 V AC rtrn voltage
X1 Input Control signMX Input, neutral als (VH, VC
VH Increase short-circuited
VC Decrease to G0)
G1 16 V DC Supply for RC
Y 0–100 % Feedback
signal
N.B.! When installed with 3
conductors, where the control signal
reference is connected to G0, the motor
current of the actuator will cause
varying voltage loss in the cable and
thus in the reference level. Forta, which
has a highly sensitive control signal
input, will detect the varying signal and
follow it, which makes it difficult for the
actuator to find a stable position.
This variation may be accepted in
simplified installations on the following
conditions: the cables between the
controller and actuator are shorter than
100 m (328 ft.), the cross-sectional area
is larger than 1.5 mm2 (AWG 16) and
the cables are only connected to one
actuator.
Please refer to the figures labelled
“Wiring Examples” for wiring
instructions.
Cable lengths
The cables to G, G0 and G1 should be
max. 100 m (328 ft.) and have a crosssectional area of min. 1.5 mm²
(AWG 16).
Other cables should be max. 200 m
(656 ft.) and have a cross-sectional
area of min. 0.5 mm² (AWG 20).
Terminal
block
Figure 4
3 (6) 0-003-2060-5 (EN)
WIRING EXAMPLES
FortaController
Increase/decrease control
Normal installation (4 wires to the actuator)
FortaController FortaController
Modulating control, 24 V AC supply to the controller
(TAC 239W, TAC 6711, TAC Xenta, TAC 8000, TAC 230U, TAC 2000, TAC 9000, TAC 77xx)
Normal installation (5 wires to the actuator)
FortaController FortaController
Short cable installation (3 wires to the actuator)
Short cable installation (4 wires to the actuator)
(TAC 218E/RM, TAC 221L, TAC 228R/RL/RF, TAC 239W, TAC 258R/RL, TAC 268R/RL/RF)
Normal installation (5 wires to the actuator) PU unit installation (4 wires to the actuator)
Controller
Modulating control, galvanically isolated output in the controller (TAC 6501, TAC 6505)
0-003-2060-5 (EN) 4 (6)
Modulating control, 16 V DC supply to the controller
Forta
Controller
Control
cabinet
Forta
Figure 5
SETTINGS
* See Note below!
Function in the Description
“OFF” pos. “ON” position
1 In Out Valve closing screw direction
2 Modulating Increase/decrease Control (not at Sequence)
3 – Sequence Sequence control
4 0-10 V 2-10 V Voltage range
5 0-5 V, 2-6 V 5-10 V, 6-10 V Part of voltage range
6 60 s, 0% * 300 s, 50% * Running time (Security function*)
7 Normal Inverted Direction of movement
8 Normal Linear/Logarithmic Valve characteristic
9 Operation End position adjust (mom.)Operation/End position adjustment
Figure 6
There are nine switches in a row on the
circuit board. On delivery (’Factory’), all
switches are in the “OFF” position.
* Note!
• 0% / 60 s, 300 s / 50% has a
double function, see below!
• STS is not available.
1 Valve Closing Screw Direction—
IN / OUT
IN direction of movement is used when
the screw of the actuator moves
inwards to close the valve.
OUT direction of movement is used
when the screw of the actuator moves
outwards to close the valve.
Note! At power failure, the STS
closes according to this switch.
Y = 2 V at close valve.
2 Control signal—MOD / INC
TAC Forta can either be controlled by a
variable direct voltage, a so called
modulating signal (MOD), or by an
increase/decrease signal (INC).
3 Sequence or parallel control—
– – – / SEQ
With sequence (or parallel) control
(SEQ), two actuators/valves can be
controlled by only one control signal.
For each of these you can choose
which part of the voltage range to use,
the upper one, 5-10 V (6-10 V) or
the lower one, 0-5 V (2-6 V).
If the switch NORM / INV is in the
NORM position, the higher voltage
corresponds to 100% flow and the
lower one to 0%.
With NORM / INV in the INV position
you will get the opposite function.
Note! If sequence or parallel control
is not used, the switch – – – / SEQ
must be in the OFF position, as the
switch MOD / INC is not valid during
sequence or parallel control.
4 Voltage range—0-10 / 2-10
You can choose whether to use the
control signal voltage range 0-10 V or
2-10 V.
5 Part of voltage range—
0-5, 2-6 / 5-10. 6-10
You can choose which part of a voltage
range to use, the lower one 0-5 V
(2-6 V) or the upper one 5-10 V
(6-10 V).
If the switch is in the NORM position,
the higher voltage corresponds to 100%
flow and the lower one to 0%. To
achieve the opposite function, the
switch should be put in its INV position.
6a Running time—60 s / 300 s
With increase/decrease control, you can
choose a running time between 60 s or
300 s.
With modulating control, the running
time is always 15 s / 20 s / 30 s
(or 60 s, for M400 versions only) depending of stroke of valve.
6b Security function—0% / 50%
At 2–10 V control signal you can select
which security function you want the
actuator to have.
If the actuator is used for heating
control and switch 6 is ON (50%), the
actuator will open the valve halfway if
the control signal disappears, e.g. if the
X1 connection is unplugged.
If, instead, you want the valve closed,
set switch 6 to OFF (0%).
Note! The direction of movement is also
5 (6) 0-003-2060-5 (EN)
significant. See the succeeding
description.
7 Direction of movement—
NORM / INV
When normal direction of movement is
used, the screw of the actuator moves
inwards when the control voltage
decreases or if the actuator gets a
decrease signal.
With the switch NORM / INV, the
direction of movement can be changed.
8 Linearization—NORM / LIN/LG
The motorized valve characteristics can
be modified. If you wish for the
characteristics to be affected, the
setting LIN/LG will make the
characteristics of an equally modified
percentage (EQM) valve almost linear.
On the other hand, with LIN/LG a
motorized valve equipped with a linear
valve will operate with ”Quick open
characteristics”. This means that with a
small control signal, the valve will be
almost completely open.
Note! For the actuator to register
new settings of the switches, the
supply voltage must be cut or the
manual operation handle lowered,
the settings done, and then the
handle raised again.
Please refer to illustration on page 2.
(This does not apply to the switch
OP/ADJ).
9 End position adjustment—
OP / ADJ
This switch is only used to adjust the
end positions when the actuator is
commissioned.
Momentarily put the switch in the ON
position. The actuator will automatically
find the end positions of the valve.
ACTUATOR INSTALLATION
The switches on the circuit board
should be set before the actuator is
installed. There are no other switches
or potentiometers that should be set or
adjusted.
To make an end position adjustment,
you only have to switch the switch
»OP/ADJ« into its ADJ position, when
the supply voltage has been turned on,
and then back to its OP position.
MAINTENANCE
The actuator is maintenance-free.
When an end position adjustment is
made, Forta closes the valve and opens
it fully. The adjustment is finished by
the actuator closing the valve again; the
electronic circuitry then adjusts the
stroke and the running time to the
valve. The set values are stored in the
EEPROM of the actuator so that they
will remain after a loss of voltage.
When the end position adjustment is
complete, the actuator starts to control
the valve according to the control
signal.
ACCESSORIES
S2-Forta .................................................................................................. 880-0104-000
Circuit board M400.................................................................................. 1-001-0673-0
Linkage Satchwell valves L2SV ............................................................ 880-0124-000
See data sheet “Valves and actuators Summary” (F-10-06)
TAC AB, Jägershillgatan 18, SE-213 75 MALMÖ, SWEDEN, +46 40 38 68 50 (switchboard), tac.com
0-003-2060-5 (EN) 6 (6)
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