Unique design to allow transducers in hazardous areas without the need of zener barriersՕ Analogue output 10 VDC, ѱ020 or 4֖20 mA Serial communications: RS-485, MODBUS RTU protocolՕ Relay outputs Compact DIN rail mounting Օ CE compliant EMC and Low Voltage the deltaCOM program via a standard PC running under Windows 95/98/2000/NT4/ME/XP. All set-up data can be stored in the host computer and down- loaded in case of replacement of the transmitter. This requires deltaCOM full version (option).The AST 3IS is compatible with other instru-ments in the Vishay Nobel program and can com- municate via the RS-485/MODBUS RTU protocol with a common process control host ֖ PC/PLC. Fieldbus communication is possible via the GATE 3 module from Vishay Nobel.The transmitter is CE marked, and fully compliant with the EMC and Low Voltage directives. ATEX II (1) GD approvedՕ Excellent performance in spite of Ex version Fully isolated Օ Simple earthing (compared with zener barriers) Direct connection of transducers in hazardous areas without the need of zener barriers The unit AST 3IS is a DIN rail mounted, high performance isolation amplifi er designed for applications with strain gauge transducers inside hazardous areas.AST 3IS has at its heart a unique Nobel patented analogue to digital converter. The unit is equipped with analogue as well as digital outputs which can be conditioned to give the user accurate, stable and fast response measurement information.The transmitter is fi tted with two relay outputs having a short response time for use in high precision level control applications.The set-up and calibration procedure is easily performed either from the front panel or by using > helitera.se [JK] Subject to change without notice. 018 EN 0302 size="-1">

Relay 1 RS-485 MODBUS RTU 10 VDC 4і20 mA or 020 mA 4-20 mA Relay 2 Ex approval Baseefa 02 ATEX 0053 Zero drift <0.0002 % of 3.3 mV/V/ְC Gain drift <0.0015 % of actual value/C Front panel Transducer input Display 2 x 16 character LCD displayKeys 4 keys for menu control and data entry Transducers Up to 6 transducers (350 ohm each)Excitation Approx. 9 Ж 6 VDC (for 1 6 transducers)Signal input ֱ3.3 mV/V A/D-conversion 23 bits (8 300 000 counts) patented design Serial communication Relay output Analogue output Can be used for control communication (MODBUS) or remote display Interface RS-485, two-wires...