Weight transmitter for explosive areas Vishay Nobel Transducers
ATEX

Transmitter - AST 3IS

AST 3IS
* Unique design to allow transducers in hazardous areas without the need of zener barriers
* Analogue output ± 10 VDC, 0-20 or 4-20 mA
* Seriel communications: RS-485, MODBUS RTU protocol
* Relay outputs
* Compact DIN rail mounting
* CE compliant - EMC and Low Voltage

The unit AST 3IS is a DIN rail mounted, high performance isolation amplifier 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 equiped 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 fitted with two relay outputs having a short response time for use in high precision level control applications.

The AST 3IS is compatible with other instruments in the Vishay Nobel programme and can communicate via the RS-485/MODBUS RTU protocol with a common process control host - PC/PLC. Fieldbus communication is possible via the GATE 3S module from Vishay Nobel.

* [EEx ia] IIC approved
* Excellent performance in spite of EX version
* Fully isolated
* Simple earting (compared with zener barriers)
* Direct connection of transducers in hazardous areas without the need af zener bariers