Options - ABB TZIDC-110 Operating Instructions Manual

4.2 Options

Module for the shutdown function
Supply voltage
Safe position is activated
AK approval
Test report No.
Explosion protection
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.
Digital position feedback with proximity switches
2 proximity switches for independent position signaling.
Switching points adjustable between 0 and 100 %
Current circuits to DIN 19234 / NAMUR
Supply voltage
Signal current < 1 mA
Signal current > 2 mA
Direction of action (logical state):
Proximity switch
SJ2-SN (NC)
SJ2-S1N (NO)
When using proximity switch type SJ2-S1N (NO) the TZIDC-110 positioner
may be exposed to an ambient temperature of -25 °C ... +85 °C, only.
!
NOTICE
1. The 'digital position feedback' option is directly actuated by the rotating shaft of the
positioner and can only be used together with the (optional) mechanical position
indicator.
36
24 V DC (20...30 V DC)
(electrically isolated from the input signal)
when voltage < 5 V
AK 4 to DIN V 19250
101/S01/148
see chapter "Certificates" starting on page 38
5...11 V DC
logical "0"
logical "1"
Position
< Lim.1 > Lim. 1 < Lim. 2
0 1
1 0
Electro-pneumatic positioner TZIDC-110
1
> Lim. 2
1 0
0 1
41/18-77 EN