| Type |
A781 |
| Function |
Electro-pneumatic positioner |
| Application |
Device provides fast and accurate setting
of actuator piston rod position, depending
on the real input signal value of the setter.
It co-operates with pneumatic
linear diaphragm-type actuators and one-way working part-turn actuator |
| Travel or angle of rotation of co-operating actuator |
10 ... 100 mm
0...60o; 0...90o |
| Input signal (control) |
0 ... 20mA; 0 ... 10 mA;
10 ... 20 mA; 4 ... 20 mA;
4 ... 12 mA; 12 ... 20 mA |
| Pneumatic output signal |
0 ... 100% of supply pressure |
| Supply pressure |
0,14 ... 0,25 MPa or 0,25 ... 0,60 MPa |
| Input resistance |
250 Ω |
| Basic error |
1% |
| Hysteresis |
max 0.5%
at supply pressure 0.14 ... 0.25 MPa
max 1%
at supply pressure 0.25 ... 0.60 MPa |
| Operating temperature range |
standard version: -40°C ... +80°C
spark-safety version: please look at data at page 3 point 3 in catalogue data sheet |
| Sensitivity |
0.05% |
| Operation characteristics |
Linear |
| Additional error from ambient temperature change |
0.4% / 10°C |
| Own air consumption |
0.35 kg/h at supply pressure 0.14 MPa
0.55 kg/h at supply pressure 0.25 MPa
0.90 kg/h at supply pressure 0.6 MPa |
| Casing protection degree |
IP 54 |
| Intrinsic safety |
 II 2G EEx ia IIC T6/T5/T4
|