Badger Meter SRD/SRI Valve Positioners - Manual (Page 10)

PROFIBUS-PA SUMMARY
Mounting to the Actuator (Valve)
The SRD960 can be mounted to stroke or rotary actuators
Connection and Startup
Connect the pneumatic tubing Upon connection of supply air and a voltage source of, for example, 12V DC to the input
terminals (polarity is random), an initial startup can be carried out without any further equipment
Use the local push-buttons to change basic parameters such as type of actuator, side of installation, valve opens/closes with
increasing setpoint value, and characteristics curve of the valve (values set ex-factory: stroke actuator, mounting side: left,
valve opens with increasing setpoint value, linear characteristics curve)
Thereafter, an AUTOSTART can be performed during which the SRD960 determines independently the geometric data of the
actuator as well as control parameter, to ensure an optimized operation with the attached valve
Bus Connection
The PROFIBUS-PA version of the SRD960 is bus-compatible, which means that to a 2-core lead the instruments have to be
attached parallel according to IEC 1158-2 The lead serves as voltage feeder as well as for digital communication To activate
each instrument individually, an individual address has to be entered
Ex-factory always stores the address 126
1) ; since this address cannot be used during operation, a new address has to be
entered in every instrument This can be done via the local keys, with the PC20-software or a commercial configurator
You can attach up to 32 instruments to a PROFIBUS-PA-segment with a length of up to 1900 m A maximum of up to 126
instruments can be addressed at the PROFIBUS
System Integration
During operation, the SRD960 will communicate with a PROFIBUS master class 1 The required GSD-file (“instrument-specific
dates”) can be downloaded from our website
1) as per profile 3 0
More information about PROFIBUS at www.profibus.com
Figure 4: PROFIBUS-PA
Page 10
Profibus-PA Summary
August 2014 POS-UM-00009-EN-02