ABB TZIDC-110 Operating Instructions Manual

Also see for TZIDC-110: Operating instructions Commissioning instructions Commissioning Instruction Short manual Commissioning instructions

36 Electro-pneumatic positioner TZIDC-110 41/18-77 EN4.2 OptionsModule for the shutdown functionSupply voltage 24 V DC (20...30 V DC)(electrically isolated from the input signal)Safe position is activated when voltage < 5 VAK approval AK 4 to DIN V 19250Test report No. 101/S01/148Explosion protection see chapter "Certificates" starting on page 38A 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 caseof 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 adouble-acting actuator both outputs are closed.The shutdown module works independently of the mother board, i.e. all information from thefinal control element is available in the supervisory process control system at any time.Digital position feedback with proximity switches 12 proximity switches for independent position signaling.Switching points adjustable between 0 and 100 %Current circuits to DIN 19234 / NAMURSupply voltage 5...11 V DCSignal current < 1 mA logical "0"Signal current > 2 mA logical "1"Direction of action (logical state):1. The ’digital position feedback’ option is directly actuated by the rotating shaft of thepositioner and can only be used together with the (optional) mechanical positionindicator.Proximity switch Position< Lim.1 > Lim. 1 < Lim. 2 > Lim. 2SJ2-SN (NC) 0 1 1 0SJ2-S1N (NO) 1 0 0 1!NOTICEWhen using proximity switch type SJ2-S1N (NO) the TZIDC-110 positionermay be exposed to an ambient temperature of -25 °C ... +85 °C, only.