Interfaces Of The Positioner - bürkert 8791 Bedienungsanleitung

Type 8791
Function
7.5. interfaces of the positioner
Input for
set-point value *
4 ... 20 mA **
0 ... 20 mA
Binary input
24 V DC
Communications
interface
* or optionally AS interface bus connection
** Default setting
Fig. 5:

Interfaces of the positioner

The positioner Type 8791 is a 3-wire device, i.e. the power (24 V DC) is supplied separately from the set-
point value signal.
• Input for nominal position value (4 – 20 mA corresponds to 0 – 100%)
(depends on the position of DIP switch 1).
• Binary input
When applying voltage of > 12 V, SAFEPOS will be activated, i.e. the valve is moved into the safety position.
• Analog position feedback (optional)
The position of the valve can be relayed to the PLC via an analog 4 – 20 mA output (4 – 20 mA corresponds to
0 – 100%).
Positioner
Operation
note:
Optional inputs and outputs
are illustrated by dotted lines
Analog position
feedback
(optional)
Initiator 1 / Initiator 2
24 V PNP NO
(optional)
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