ABB V18345

Module for analog position feedback1) Signal range 4 ... 20 mA (configurable split ranges) Supply, 2-wire circuitry 24 V DC (10 ... 30 V DC) 48 V DC (20 ... 48 V DC, no ignition protection) Characteristic curve (configurable) Rising or falling Characteristic deviation < 1 % Important 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 feedback1) Two switches for digital position feedback (position adjustable within the range of 0 ... 100%, ranges cannot overlap) Current circuits acc. to DIN 19234 / NAMUR Supply voltage 5 ... 11 V DC Signal current < 1.0 mA Switching state logical “0“ Signal current > 2,0 mA Switching state logical “1“ Direction of action normally logical “0“ or logical “1“ (configurable) Module for the emergency shutdown function2) Supply voltage 24 V DC (20 ... 30 V DC) (galvanically isolated from input signal) Safe position is activated when voltage < 5 V Explosion protection see certificate (operating instructions) SIL See “Explosion protection” A separate 24 V DC signal is normally applied to the emergency shutdown module, which connects through the signal from the microprocessor to the I/P module. When the 24 V DC signal is interrupted, the pneumatic module executes the respective safety function, depending on the mechanical construction: The positioner output 1 is depressurized, and the valve is moved to the safe position. In case of a double-acting actuator the second output 2 is additionally pressurized. Important The emergency shutdown module can only be used with pneumatics with the safe position “fail-safe”. The emergency 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 emergency shutdown function uses the same space as the module for analog feedback and the module for analog or digital feedback and cannot be plugged in and run together with any of them. Digital position feedback with proximity switches Two proximity switches for independent position signaling. Switching points adjustable between 0 … 100 % Current circuits acc. to DIN 19234 / NAMUR Supply voltage 5 ... 11 V DC Signal current < 1.0 mA Switching state logical “0“ Signal current > 2,0 mA Switching state logical “1“ Direction of action (logical state) Position Proximity switch < Lim. 1 > Lim. 1 < Lim. 2 > Lim. 2 SJ2-SN (NC) 0 1 1 0 SJ2-S1N (NO) 1 0 0 1 Important When using SJ2_S1N (NO), the TZIDC positioner may only be used at an ambient temperature range from -25 ... 85 °C (-13 ... 185 °F). Digital position feedback with 24 V microswitches Two microswitches for independent position signaling. Switching points adjustable between 0 … 100 %. Voltage max. 24 V AC / DC Load rating max. 2 A Contact surface 10 µm Gold (AU) Mechanical position indicator Indicator disk in enclosure cover, linked with positioner feedback shaft. Important These options are also available for retrofitting by Service.