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4.2 Options
Module for analog position feedback
Range 4 ... 20 mA (configurable split ranges)
Two-wire circuitry, power supply
Action direct or reverse (configurable)
Characteristic deviation < 1 %
Note: Without a signal from the positioner (e.g. no energy or initializing) the module sets the
output to > 20 mA (alarm level)
Module for digital position feedback
2 switches for position signals (position adjustable between 0 and 100%,
ranges cannot overlap)
Current circuits to DIN 19234/NAMUR
Supply voltage
Signal current < 1.0 mA
Signal current > 2.0 mA
Effective direction:
Module for the shutdown function
Supply voltage
Safe position is activated when
AK approval
Test report No.
Explosion protection
SIL
A separate 24 V DC signal is normally applied to the shutdown module, which connects th-
rough the signal from the microprocessor to the I/P module. When the 24 V DC signal is in-
terrupted, the I/P module executes the respective safety function, depending on the mecha-
nical construction.
Fail safe:
The positioner output 1 is depressurized, and the valve moves to the safe position. In case
of a double-acting actuator the second output is additionally pressurized.
Fail-freeze:
The pneumatic ouput 1 is closed, and the valve "freezes" in its current position. In case of a
double-acting actuator both outputs are closed.
The shutdown module works independently of the mother board, i.e. all information from the
final control element is available in the supervisory process control system at any time.
1. The module for analog position feedback and the module for digital position feedback plug in separate slots and can
be used together.
2. The module for the shutdown function uses the same space as the module for analog feedback and the module for
digital feedback and cannot be plugged in and run together with any of them.
36
1
1
2
Electro-pneumatic positioner TZIDC
24 V DC (10...30 V DC)
48 V DC (20...48 V DC, no explosion
protection)
5...11 V DC
logical "0"
logical "1"
normally logical "0" or logical "1"
(configurable)
24 V DC (20...30 V DC)
(electrically isolated from the input signal)
voltage < 5 V
AK 4 to DIN V 19250
101/S01/148
see certificates
see page 34
41/18-79 EN
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