Badger Meter SRD/SRI Valve Positioners - Manual (Page 13)

Built-in Limit Switches
Stroke / angle derived from positioner feedback
Inductive proximity sensors,
– standard version (SJ2-N) . . . . . . . Code T (down to –20°C)
– security version (SJ2-SN) . . . . . . Code U
– 3-wire (SI2-K08-AP7/ PNP). . . . . Code R (no Ex)
– Micro switches . . . . . . . . . . . . . . . Code V (no Ex)
(Details see next page)
Entry for remote potentiometer
(for remote mounting main unit)
– Code D
This remote application is used in applications where high
temperatures or vibration are present and can result in
negative influences to the control. It can also be used in
places not easy to reach, to ensure an easier handling of
the unit, or for cylinders with large strokes.
The Positioner unit (Remote unit) is mounted far away from
the valve or cylinder in a safe environment.
The Potentiometer unit is mounted on the valve or cylinder.
This potentiometer unit can be made of a derivative version
of the SRI990 positioner (only potentiometer in the housing)
or of an external potentiometer like a linear potentiometer
for application onto cylinders, for example.
This option is to be used with a potentiometer unit 3 wires
system with ca. 5 kOhm resistance.
If the following requirements are observed, the set-up is
insensitive to electrical disturbances caused by high
electromagnetic fields, EMC and HF-radiation.
Cable Length max.. . . . . . . . 10 m (32 ft)
Cable Specification (not supplied by Foxboro Eckardt):
• 3-wire twisted pair, shielded
• Shield needs to be connected on both ends to the internal
ground
• Shield endings need to be kept very short when connec-
ting to the ground
• A HF cable gland is not required
For more information about remote mounting please
consult TI EVE0105 R.
Parts Kits for additional installation of auxiliary functions
ti K s tr a P y l p p u S e d o c l e d o M
Code T: Limit signal switch, normal version
external EW 426 164 012
Code U: Limit signal switch, security version external EW 426 164 021
Code R: Limit signal switch, 3-wire external EW 426 164 057
Code V: Limit signal switch, micro switches external EW 426 164 066
Code D: Entry for remote potentiometer internal EW 426 164 093
Functional Specifications Common to All Versions
Page 13 August 2014 POS-UM-00013-EN-02