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MXG461B Series Modulating Control Valve
with Magnetic Actuator
Control
Basic Diagram
Spring Return Action
LED
Green
Red
Both
Siemens Building Technologies, Inc.
The magnetic actuator can be driven by any controller with a 0/2 to 10 Vdc or 0/4 to
20 mA output signal.
To achieve optimum control performance, it is recommended to use a 4-wire connection
for the valve.
The controller's signal ground terminal M must be connected to the valve's terminal M.
Terminals M and G0 have the same potential, and are internally interconnected in the
valve's
electronics.
CAUTION:
You must use a four-wire connection with Vdc power supply.
G0
G
Y
M
U
Z
Phs
Phs
X3 AMP
Bus-Subprint
If the power or positioning signal is switched off or fails, the valve control path
(port A → AB) is automatically closed by the force of the spring.
Table 2. Indication of Operating State.
Indication
Operating State,
Function
Lit
Control mode
Flashing
Calibration
In manual control
Lit
Calibration error
Internal error
Flashing
Mains fault
DC Supply -/+
Dark
No power supply
Electronics faulty
Power
Supply
Power
Control
0/2 to 10 V
0/4 to 20 mA
Stroke
Control
0/2 to 10 V
Micro
0/4 to 20 mA
Controller
DIP-Switch
1
2
SPh
ON ON
ON
0 to 20 Vdc
Calib.
Green / Red
B-Mode
Remarks, Troubleshooting
Normal operation; everything OK.
Wait until calibration is finished
(green or red LED will be lit).
Hand wheel in Man or Off position.
Recalibrate (bridge contacts behind the
calibration slot).
Replace electronics module.
Check electric main network (outside the
frequency or voltage range);
Vdc supply +/- connection polarity.
Check electric main network, check wiring.
Replace electronics module.
Technical Instructions
Document Number 125-4461
1M
M
Stroke
Sensor
Hand Control
3
May 3, 2006
Page 3
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