Badger Meter SRD/SRI Valve Positioners - Manual (Page 14)

SUMMARY – FOXCOM (DIGITAL)
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
FoxCom version:
The positioner can be operated either locally, via PC, or via I/A Series System (FoxCom)
System configuration
When using ‘Communication’ (a digital signal with constant amplitude), make sure the connected outputs, buffer amplifier
and barriers are compatible with the frequency ranges used In addition to the load, the AC impedance requirements must be
met Therefore, use only the specified amplifier, barrier and configuration device
To prevent crosstalk between lines and reduce disturbances through electromagnetic influences, use twisted-pair shielded
lines with a diameter of AWG 22–14 (0 3…2 5 mm 2 ) and a maximum capacity of 100 pF/m
The line capacities and connected devices may not exceed the maximum values listed for a particular FoxCom protocol
All components connected to the SRD in an explosion hazardous area require an Ex-Approval The applicable limit values
must not be exceeded Comply with the limit values when connecting additional capacitances, inductances, voltages
and currents
Summary – FoxCom (Digital)
Page 14 August 2014 POS-UM-00010-EN-03