Page 280 - Bürkert

Signal flow plan

Position control loop
Z1

Valve
B1 opening
CMD Xd1 P K
+ E1 8793
-
Set-point Position controller Control system Proportional
position value valve

POS

Position measuring system
Position control loop

Process control loop
Z2

Position Valve Process
SP Xd2 CMD control opening value
+ loop
-
Set-point Process Process
process value Controller

PV

Transmitter

Schematic diagram of Type 8793
without Fieldbus interface
Input for positon
or process setpoint, Analogue
4 - 20mA, 0-20 mA Output feedback 2)
4-20mA
0-10 V, 0-5 V Input 0-10 V
Process
Input for process Controller
value 4-20 mA, frequency, 2 binary outputs
Pt 100 24 V PNP 2)
Binary input
Initiator 1/Initiator 2
Supply
24 V DC 1) 24 V PNP NO 2)
Operation

With Profibus DP / DeviceNet
Bus Bus
Input Output
Input for process-
value 4-20 mA, frequency, Process 2 Binary outputs
2)
Pt 100 Controller 24 V PNP
Profibus DP /
DeviceNet
Suuply 24 V PNP NO 2)
24 V DC 1) Initiator 1 / Initiator 2
Operation

1) The operating voltage is supplied with a 3-wire unit independent from the setpoint signal
2) Alternative options
Note: For assembly options please see Type 8791

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