TAC Forta M800 User Manual

1 (8) 0-003-2063-2 (EN)Subject to modification.

M800 is an electro-mechanical actuator for the control of
two-way and three-way plug valves in:

• domestic hot water systems

• heating systems

• air handling systems

M800 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.

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.

Actuator for valves

G-40-36

11 Jan 2005

TECHNICAL DATA, M800

Part numbers ....................... see the table on the next page

Supply voltage .................. 24 V AC +10%/ -40%, 50–60 Hz

Power consumption ......................................average 15 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

Close off time with STS, at power failure:

Stroke 10–25 mm (0.39 - 1 in.) ......................... max. 20 s

Stroke 25–32 mm (1 - 1.26 in.) ......................... max. 25 s

Stroke 32–52 mm (1.26 - 2 in.) ......................... max. 35 s

Stroke ............................................. 10–52 mm (0.39 - 2 in.)

Factory set stroke ................................... 41 mm (1.61 in.)

Thrust .......................................................... 800 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. 40 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 (mm) .......... refer to the table on the next page

TAC Forta M800

0-003-2063-2 (EN) 2 (8)

Designation Explanation Part number

M800 modulating control signal or increase/decrease signal 880-0310-030
M800-S2 modulating control signal or increase/decrease signal and end point switches 880-0311-030
M800-STS modulating control signal or increase/decrease signal and self testing

safety device 880-0312-040

M800-S2-STS modulating control signal or increase/decrease signal with end point switches

and self testing safety device 880-0313-040

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

M800 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.

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

Manual
operation
handle

PART NUMBERS

FUNCTION

Figure 1

DIMENSIONS

173

44

315

82

243

117

(6.81)

(4.60)

(9.57)

(3.235)

(1.73)

(12.40)

137

(5.39)

238

(9.37)

Mått: mm
Dimensions: (in.)

3 (8) 0-003-2063-2 (EN)

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.

Figure 3

MOUNTING

STS is a processor controlled, battery
operated safety device which monitors
the presence of supply voltage to Forta
actuators. The device supplies the
actuator with power so that the actuator
is able to close the valve in the event of
a loss of power.

The battery is tested periodically during
normal operation. Moreover, it is
charged continuously for maintenance
purposes.

Batteries for the STS uses NiCd.

SELF TESTING SAFETY DEVICE, STS

Figure 4

TECHNICAL DATA, STS

Supply voltage, G ........................................ 24 V AC ±10 %

G0 ........................................................................... return

Output voltage AC-DC, GF .......................... 24 V DC ±10 %

G0F ......................................... return, alt. 24 V AC ±10 %

Time to toggle AC to DC......................................... max. 5 s

DC voltage supplied during .......................................... 70 s

Inputs:

Battery A ..................................... 8,4 V DC–min 600 mAh

Outputs:

Battery B, “rapid charging” ................................... 115 mA

Alarm outputs KC, K1 and K2

............................................ 2 A–24 V AC two-way SPDT

Indication:

Green LED ............................................ Normal operation

Red LED .................................................................. Alarm

Red LED on circuit board ........... Rapid charging is active

Settings:

Bypass MAN............................ no jumper, external button

Bypass AUTO........................ jumper on, internal function

Ambient temperature ......... –10 °C – +50 °C (14°F - 122°F)

Ambient humidity ............................................max 65 % RH

Enclosure rating........................................................... IP 44

Standards:

Emission ............................................... EN 50081-1:1992

Immunity ............................................... EN 50082-1:1992

Heat ................................................................. IEC-68-2-2

Cold ................................................................. IEC-68-2-1

Materials:

Box ...................................................... PC Makrolon 8035

Lid ....................................................... PC Makrolon 8035

Bracket .............................................................SS 1412-2

Color ............................................................................ black

Weight, including battery ............................... 0.3 kg (0.7 lb.)

Dimensions .............. please refer to the dimension drawing

0-003-2063-2 (EN) 4 (8)

Figure 5

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

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).

YX1MXVHVCG1G0G

123456789

Terminal

block

NORM

VH VC

VH VC

INV

X1

10V

0(2)V

INV

10V

X1

NORM

0(2)V

STS

GMX VH VC G1 G0X1Y

0 V

24 V~

K1

K2

KC1

CLOSING RELAY

OPENING RELAY

S2

Ej ändläge

Non ending position

Ändläge

Ending position

KC2

K3

K4

Ej ändläge

Non ending position

Ändläge

Ending position

5 (8) 0-003-2063-2 (EN)

WIRING EXAMPLES

Figure 6

Forta

Controller

Increase/decrease control

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)

Modulating control, 16 V DC supply to the controller

(TAC 218E/RM, TAC 221L, TAC 228R/RL/RF, TAC 239W, TAC 258R/RL, TAC 268R/RL/RF)

Modulating control, galvanically isolated output in the controller (TAC 6501, TAC 6505)

Forta

Controller

Forta

Controller

Normal installation (4 wires to the actuator)

Short cable installation (3 wires to the actuator)

FortaController FortaController

Normal installation (5 wires to the actuator)

Short cable installation (4 wires to the actuator)

FortaController

Forta

Controller

Normal installation (5 wires to the actuator) PU unit installation (4 wires to the actuator)

Control
cabinet

0 V

24 V AC

G0

G

K1
K2

KC

G0

G

VH
VC

G0

G

X1
MX

Y
M

0 V

24 V AC

G

G0

0 V

24 V AC

G0

G

Y

M

G0

G

X1
MX

0 V

24 V AC

G0

16 V

G1

Y

M

G0

G

G1
X1
MX

0 V

24 V AC

G0

16 V

G1

Y

M

G0

G

G1
X1
MX

0 V

24 V AC

G0

G

+

OUT

–

G0

G

G1
X1
MX

16 V

0 V

24 V AC

G0

G

+

OUT

–

G0

G

X1
MX

16 V

G1 G0

G

PU

0-003-2063-2 (EN) 6 (8)

0 V

24 V AC

G0

G

Y

M

G0

G

X1
MX

G

G0

G0

GF

K2
K1

KC

G1

G1

16V

0 V

24 V AC

G0

16 V

G1

Y

M

G0

G

G1
X1
MX

G

G0

G0

GF

K2
K1

KC

0 V

24 V AC

G0

G

+

OUT

–

G0

G

G1
X1
MX

16 V

G

G0

G0

GF

K2
K1

KC

0 V

24 V AC

G0

G

+

OUT

–

G0

G

X1
MX

16 V

G1 G0

G

PU

G

G0

G0

GF

K2
K1

KC

0 V

24 V AC

G0

G

Y

M

G0

G

X1
MX

G

G0

G0

GF

K2
K1

KC

0 V

24 V AC

G0

G

Y

M

G0

G

X1
MX

G

G0

G0

GF

K2
K1

KC

0 V

24 V AC

G0

G

K1

K2

KC

G0

G

VH
VC

G

G0

G0

GF

K2
K1

KC

WIRING EXAMPLES WITH STS

Figure 7

Forta

Controller

Increase/decrease control

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)

Modulating control, 16 V DC supply to the controller

(TAC 218E/RM, TAC 221L, TAC 228R/RL/RF, TAC 239W, TAC 258R/RL, TAC 268R/RL/RF)

Modulating control, galvanically insulated output in the controller (TAC 6501, TAC 6505)

FortaController

Controller

Normal installation (4 wires to the actuator)

Short cable installation (3 wires to the actuator)

Forta

Controller

Forta

Controller

Normal installation (5 wires to the actuator)

Short cable installation (4 wires to the actuator)

FortaController

Forta

Controller

Normal installation (5 wires to the actuator) PU unit installation (4 wires to the actuator)

Control
cabinet

STS

STS STSForta

STS STS

STS

STS

7 (8) 0-003-2063-2 (EN)

SETTINGS

INC

0-5, 2-6

ADJ

LIN/LG

INV

300 s

2-10

5-10, 6-10

SEQ

OP

NORM

NORM

60 s

0-10

– – –

MOD

1234 567 8

O

N

9

OUTIN

Figure 8

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

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.

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.

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 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.

0-003-2063-2 (EN) 8 (8)

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.

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.

MAINTENANCE

The actuator is maintenance-free.

ACCESSORIES

Circuit Board M800 Spare .................................................................... 1-001-0674-0

TAC Forta Handbook (GB) ...................................................................... 0-004-7804

S2-Forta ............................................................................................... 880-0104-000

STS-Forta M310/M800 ........................................................................ 880-0107-010

NiCd batteries for the STS .................................................................... 1-001-9024-0

TAC AB, Jägershillgatan 18, SE-213 75 MALMÖ, SWEDEN, [phone] (switchboard), tac.com