Badger Meter SRD/SRI Valve Positioners - Manual (Page 37)

Figure 19: Levels of control vanes (illustration without cover)
Setting Limit Switch Trigger Points
First loosen screw S until disc D is no longer blocked by bolt B
Then turn disc by 90°, until set screws 1 and 2 are accessible
Set trigger point switch GW1:
Turn screw 1 at mark (•), until desired switch behavior is reached
Set trigger point switch GW2:
Turn screw 2 at mark (• •), until desired switch behavior
is reached
To fix switch points turn disc again by 90°, until the bolt catches,
then fasten tight the center screw S
Additional Inputs / Outputs
General
All versions of the SRD991 are prepared to retrofit this option
Take current off SRD and turn off the supply air Unscrew cover and remove electronics unit 40
Attach option board 8 to connection ledge (observe orientation, see illustration) Refasten electronics unit 40
After initialization, acknowledge message 10 by simultaneous pressing keys UP + DOWN
Option “Position Feedback and Alarm”
The analog output for position feedback indicates the valve position 0…100% as current signal 4…20 mA
1) Signal range is
3 8…20 5 mA, at fault approx 0 5 mA
1) The direction of action of the position response message is set: valve position 0% = 4 mA; valve position 100% = 20 mA
The binary output for Alarm will be activated in the following cases (see “Messages” ):
• Calibration error
(for example due to break-up of calibration) Message 3
• Output outside of limits determined during Autostart
(Check mounting of feedback lever) Message 5
• Circuit to potentiometer is disturbed
(cable plugged?) Message 5
• Circuit to IP module is disturbed
(cable plugged?) Message 6
• No actuator movement; Message 7
• Remaining control deviation (packing is too tight?)
Message 11
Signal range: 1 mA resp 4…6 mA, at fault < 50 μA
In the event of disturbances in the electronics of the SRD, the Watchdog circuit is activated The binary output for alarm
signalizes this as “cable failure”
Options
Page 37 August 2014 POS-UM-00010-EN-03