Burkert Type 8791 - Manual (Page 15)

15
Structure
6. sTrucTure
The positioner Type 8791 consist of the micro-processor controlled electronics, the position sensor and the control
system.
The appliance is designed using three-wire technology. The unit is operated via 2 keys and 4 DIP switches.
3 LEDs indicate the different statuses of the unit.
The pneumatic control system for single-acting and double-acting actuators consists of 2 solenoid valves.
6.1. representation
Mechanical position indicator
Display module with 3 LEDs
Working connection 2
(connection: A2)
Supply pressure connection 1.4 – 7 bar
(connection: P)
Working connection 1
(connection: A1)
Air exhaust connection/
air exhaust filter
Internal position sensor
Axle for position sensor
Cable gland
Electronic module
Control system
Pressure-relief valve
Figure 1: Structure, positioner type 8791
english
Type 8791