TAC Forta M700
G-40-50
Spring return actuator for valves
M700 is a spring return electro-mechanical actuator for the
control of two-way and three-way plug valves in:
• domestic hot water systems
• heating systems
• air handling systems
M700 is either controlled by an increase/decrease signal or
by a modulating 2–10 V control signal. Modulating control
makes for a faster positioning of the actuator.
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.
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 16 V DC
voltage supply for older TAC controllers.
14 Mar 2007
TUV
APPROVED
TECHNICAL DATA, M700
Part numbers ........................ see the table on the next page
Supply voltage ..................24 V AC +25%/ -30%, 50–60 Hz
Power consumption .......................................average 30 VA
Transformer sizing ........................................................ 50 VA
Running time:
Modulating 10-25 mm (0.39 - 1 in.) ............................. 15 s
Modulating 25-32 mm (1 - 1.26 in.) ............................. 20 s
Modulating 10-52 mm (0.39 - 2.05 in.) .......................30 s
Increase/decrease ............................................ 300 s/60 s
Spring return close off time at power failure:
Less than 35 seconds ............................. 20 mm (0.78 in.)
Less than 65 seconds.................................45 mm (1.77 in.)
Stroke ........................................ 9–52 mm (0.35 - 2.04 in.)
Factory set stroke .................................... 20 mm (0.78 in.)
Thrust .............................................................700 N (180 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. 50 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 plastic
Color ........................................................................ black/red
Weight............................................................ 1.8 kg (3.96 lb.)
Dimensions (mm) .......... refer to the table on the next page
Third Party approval ....................................................... TUV
1 (6) 0-003-3263-2 (EN)Subject to modification.
PART NUMBERS
action (the stem is pulled up when power off), including a linkage for Satchwell
Designation Explanation Part number
M700-SRSU
M700-S2-SRSU
M700-SRSD
M700-S2-SRSD
M700-SRSU+L7SV
M700-S2-SRSU+L7SV
M700-SRSD+L7SV
M700-S2-SRSD+L7SV
DIMENSIONS
modulating control signal or increase/decrease signal, "Stem Up" spring
action (the stem is pulled up when power off)
modulating control signal or increase/decrease signal, "Stem Up" spring
action (the stem is pulled up when power off) and end point switches
modulating control signal or increase/decrease signal, "Stem Down" spring
action (the stem is pushed down when power off)
modulating control signal or increase/decrease signal, "Stem Down" spring
action (the stem is pushed down when power off) and end point switches
modulating control signal or increase/decrease signal, "Stem Up" spring
valves
modulating control signal or increase/decrease signal, "Stem Up" spring
action (the stem is pulled up when power off) and end point switches,
including a linkage for Satchwell valves
modulating control signal or increase/decrease signal, "Stem Down" spring
action (the stem is pushed down when power off), including a linkage for
Satchwell valves
modulating control signal or increase/decrease signal, "Stem Down" spring
action (the stem is pushed down when power off) and end point switches,
including a linkage for Satchwell valves
880-0430-000
880-0431-000
880-0440-000
880-0441-000
880-0630-000
880-0631-000
880-0640-000
880-0641-000
Figure 1
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.
In case of power loss, the spring will bring
the actuator totally up (“SRSU” models) or
totally down (“SRSD” models)
Control signal
M700 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
Due to the safety function implemented,
manually operating the actuator is only
possible when power off using a 10 mm
wrench (see figure 2).
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.
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 2
0-003-3263-2 (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.
N.B.! When coupling the spindle, register
it to get a small spring pre-load.
CONNECTIONS
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 three
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
Figure 3
is larger than 1.5 mm2 (AWG 16) and
the cables are only connected to one
actuator. Please refer to the figures
labelled “Simplified installation” 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 5
3 (6) 0-003-3263-2 (EN)
WIRING EXAMPLES
FortaController
Increase/decrease control
Normal installation (4 wires to the actuator)
Controller Forta
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)
FortaController
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)
0-003-3263-2 (EN) 4 (6)
Modulating control, 16 V DC supply to the controller
Forta
Control
cabinet
Controller
Forta
Figure 6
SETTINGS
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 300 s Running time
7 Normal Inverted Direction of movement
8 Normal Linear/Logarithmic Valve characteristic
9 Operation End position adjust (mom.)Operation/End position adjustment
Figure 8
There are nine switches in a row on the
circuit board. On delivery (’Factory’), all
switches are in the “OFF” position.
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.
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.
6 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.
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,
the settings done, and then the power
on
or
the end position adjustment must be
done again (see point 9).
(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.
At the end of the adjustment all the other
dip switch settings (1 to 8) will be read
again.
5 (6) 0-003-3263-2 (EN)
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.
Hot media hazard. Before removing
actuator from valve or opening the valve,
ensure that the valve control medium is
isolated and relive the pressure. Work
should only be carried out by a competent
engineer.
ACCESSORIES
S2-Forta .................................................................................................. 880-0104-000
Circuit board M700-SRSU ...................................................................... 1-001-0678-0
Circuit board M700-SRSD ...................................................................... 1-001-0679-0
Linkage Satchwell valves L7SV ............................................................ 880-0126-000
See data sheet “Valves and actuators Summary” (F-10-06)
www.tac.com
0-003-3263-2 (EN) 6 (6)
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