Data Sheet for Product

2
Siemens
CM2N4658en
Smart Infrastructure
2021-10-26
Features
● Brushless, robust DC motors ensure reliable operation regardless of load.
● The valve actuators do not require an end position switch, are overload proof, and
remain in place upon reaching the end stop.
● The gears are maintenance free and low noise.
● Suitable for use with modulating (DC 0…10 V), 2-position or 3-position controllers.
● We recommend a minimum pulse length of 500 ms on rotary actuators operated with 3-
point control to ensure continuous and accurate operation.
● On plants where the rotary actuator must move to the zero position (emergency position)
during power failure.
Functions
Type
1)
GMA..21.9E
GMA131.9E
GMA161.9E
GMA161.9E/MO
Control type
2-position
3-position
Modulating
Modbus RTU
Rotary direction as per
mounting on ball valve
NC (normally closed)
ball valve
NC (normally closed)
ball valve
NC (normally closed) ball valve
Switch on operating
voltage:
● Actuator opens
Switch off operating
voltage:
● Actuator closes with
spring return
(clockwise)
Signal to Y1
● – rotation counter-
clockwise
● – ball valve opens
Signal to Y2
● – rotation
clockwise
● – ball valve closes
0…10 V "counter-clockwise"
Flow = 0% at Y = 0 V
Flow = 100% at Y = 0 V
0…100% "counter-
clockwise"
Flow = 0% at
Reg. 1 = 0
Flow = 100% at
Reg. 1 = 10.000
See mounting instructions M4658 for other switchings.
Emergency position
(Spring return)
On power failure or when the operating voltage is switched off, the spring moves the rotary actuator to its
mechanical zero position.
Position indication:
Mechanical
Rotary angle position indication with manual lever as position indicator.
Position indication:
Electrical
Output voltage U = DC 0 to 10 V is generated proportional
to rotary angle..
Manual adjustment
● Without voltage supplied, the rotary actuator can be rotated and fixed in any position using the supplied
Allen wrench.
● The rotary actuator returns to the zero position (actuator closed) if mechanically unlocked with an Allen
wrench or via short-term voltage
Modbus RTU (RS-485),
not galvanically isolated
Setpoint 0...100 % valve
setting
Actual value 0...100 % for
valve position forced control
open / close / Min / Max / Stop
Setpoint monitoring and
backup mode
1)
When combining GMA..1E and ASK77.2: Carefully read mounting instructions M4696 (74
319 0648 0)!
Technical design
Housing
The housing is made of aluminum:
● Flame retardant