Badger Meter SRD/SRI Valve Positioners - Manual (Page 11)

SUMMARY – FOUNDATION FIELDBUS
Mounting to Actuator (Valve)
The SRD991 can be mounted to linear or rotary actuators
Connection and Startup
When connecting the supply air and applying a current source to the input terminals, pay attention to polarity An initial
startup required no additional 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 SRD991 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 SRD 991 in the version FOUNDATION Fieldbus is bus compatible, which means that to a 2-core lead, the instruments have
to be attached in parallel according to IEC 1158-2 The lead serves as voltage feeder as well as for digital communication
A FOUNDATION Fieldbus can consist of one or several segments, each with an individual length of up to 1900 meters An
Ex-barrier should not be further than 100 meters from a bus terminal To a segment up to 32 instruments can be attached
A maximum of up to 240 instruments can be addressed (including repeater = connector of segments) To activate each
instrument individually, an individual address has to be entered
From the factory, the address 29h (41) is always stored This address can be changed automatically with the NI-Configurator
System Integration
With the NI-Configurator changes in the configuration of the SRD991 can be carried out The required files (* FFO, * SYM,
* CFF) can be downloaded from the Internet by path
http://www foxboro-eckardt com/products/srd991_en html
Summary – Foundation Fieldbus
Page 11 August 2014 POS-UM-00010-EN-03