The A5618MXX35 is a factory-installed option for Valworx 561877 24VDC positioning actuators. Installing the Modbus module will change a standard Electronic Positioning System (EPS) actuator to Modbus- RTU control. Valve position is controlled on a 0- 10,000 integer scale by writing to register 0x0011. Valve position is read (or monitored) from register 0x0019, and actuator status and alarms can be read from register 0x0018. The valve remains in position upon loss of signal.
The actuator can be positioned anywhere from 0 to 90°. When used with a ball or butterfly valve the ball or disc can be positioned anywhere from fully closed to fully open. The overall accuracy of the valve assembly will vary depending on the type of valve selected and how the valve is mounted to the actuator.
Up to 127 actuators can be addressed/controlled and monitored.
The actuator can also be controlled using standard 4- 20mA analog signal with corresponding output monitoring signal. The Modbus module updates the valve position register even when under analog control.
The actuator can be positioned anywhere from 0 to 90°. When used with a ball or butterfly valve the ball or disc can be positioned anywhere from fully closed to fully open. The overall accuracy of the valve assembly will vary depending on the type of valve selected and how the valve is mounted to the actuator.
Up to 127 actuators can be addressed/controlled and monitored.
The actuator can also be controlled using standard 4- 20mA analog signal with corresponding output monitoring signal. The Modbus module updates the valve position register even when under analog control.
| Type | Modbus-RTU control for 5618 EPS series actuators |
|---|---|
| Rotation | 0-90 degrees |
| Connection | RS485 Two-Wire |
| Input Signal | Modbus Register 0x0011/ 4- 20mA |
| Output Monitoring | Modbus Register 0x0019/ 4- 20mA |
| Deadband | 0.5%- 5.0% Adjustable |
| Steps (Integer) | 0- 10,000 per 90 degrees |
| Steps (Analog) | Min. 80 per 90 degrees |
| Fail Condition | Actuator fails in place with loss of external power or control signal. |
| Impedance | 180- 280 Ohms |
