Badger Meter SRD/SRI Valve Positioners - Manual (Page 19)

Two Binary Outputs (Limit Signals) – Code P
• Stroke / angle derived from positioner feedback
• 2 galvanically separated limit signals
• Signaling of limit value exceeding of the measured valve
stem position
• Limit signals / alarms freely configurable via local keys or
via communication
• Two-wire system, according to DIN 19234, for
external supply
Supply Voltage 8…36V DC 1) 2)
Logic limit value not
exceeded
< 1 mA
limit value
exceeded
> 2 2 mA (typ 6 mA)
device fault < 50 μA
Configurable as
Switch Output
limit value not
exceeded
< 50 μA
limit value
exceeded
> 20 mA/20 V / > 40
mA/10 V
(power derated)
Reference AB1 for upper, AB2 for lower limit
Terminals for AB1 3) A: 81+ B: 82–
Terminals for AB2 3) C: 83+ D: 84–
1) Other values in hazardous areas
2) On request we can specify higher voltage limits
3) Terminals 81…84 are marked as K21…K32 within certificate of conformity
Electrical Classification ATEX
• Types of protection and temperature classes as basic
device, see page 13
• Additions for this option, Type AI 638 P, in EC- Certificate
of Conformity PTB00ATEX2128:
◊ For use in hazardous areas in circuits certified as
intrinsically safe with the following maximum values:
Ui= 16 V, Ii= 80 mA, Pi= 250 mW
◊ Internal capacitance and inductance: Ci= 26 nF,
Li= 5 μH The electric circuits of 2 Binary Outputs are
galvanically separated from all other circuits and
from earth
One module “Additional inputs / outputs” 8 can be plugged
onto main electronics 40:
• 2 binary inputs or
• 2 binary outputs or
• 2 binary in/outputs or
• Position feedback and alarm
DTM Configuration Window
Additional Equipment
Page 19 August 2014 POS-UM-00223-EN-02