Measurement · Weighing · Control Transmitter AST 3P Transmitter AST 3P The transmitter has at its heart a unique Nobel  Analogue output ± 10 VDC, 0–20 or 4–20 mA patented completely digital A/D converter. This  Serial communications: RS-485, MODBUS advanced technology provides both analogue and RTU protocol serial outputs which can be conditioned to give  Internal resolution >8 000 000 counts the user accurate, stable and rapid response  Relay outputs measurement information.  Compact DIN rail mounting The AST 3P is compatible with other instruments in the Vishay Nobel programme and can com mu-  CE compliant – EMC and Low Voltage nicate via standard RS-485/MODBUS RTU protocol with a common process control host – PC/PLC. The unit AST 3P is a DIN rail mounted, high Fieldbus communication is possible via the performance transmitter designed for applications GATE 3 module from Vishay Nobel. with strain gauge transducers. It converts the The transmitter is CE marked, and fully output from connected loadcells into a very stable compliant with the EMC and Low Voltage signal suitable for PC or PLC based control directives. systems. AST 3P is typically used where a local display is essential either for displaying data or for front panel set-up. The set-up and calibration procedure is easily performed either from the front panel or by using the deltaCOM programme via a standard PC running under Windows 95/98/2000/NT4. All set-up data can be stored in the host computer and downloaded in case of replacement of the transmitter. This requires deltaCOM full version (option). The transmitter is Ţ tted with two relay outputs having a response time of less than 20 msec. for Set up example use in high precision level control applications. 016 EN 0212 Subject to change without notice. helitera.se [JA] Possibilities RS-485 / MODBUS Relay 1 ± 10 VDC 4–20 mA or 0–20 mA Relay 2 Weighing Pressure Measurement Force Measurement Technical data Transducer input Front panel Transducers Up to 8 transducers each 350 ohm. Display 2 x 16 character LCD display Total load >45 ohms. Keys 4 keys for menu control and data entry Signal input ±3.3 mV/V A/D-conversion 23 bits (8 300 000 counts) Patented design. Relay output Number of relays 2 (each with 1 switching group) Analogue output Relay load Max 1 A, 30 V AC or DC Bipolar current or voltage Voltage 0– 10 or ±10 VDC over >500 ohms Calibration Current 0–20 mA, ±20 mA, 4–20 mA, Methods Data sheet, Table or Dead weight –12 – 20 mA in <500 ohms Filter 0.05 to 75 Hz, selectable bandwidth Power supply Resolution 16 bits (65000 counts) Supply voltage 24 VDC ± 20%. 7 W Non-Linearity <0.01 % of range Zero drift <0.005 % of range/°C Environmental Gain drift <0.003 % of actual value/°C Temperature range –10 to +50°C CE conformity EMC, industrial for process control Serial output Can be used for control communication (MODBUS) Mechanical data or external display Dimension 75 x 100 x 110 mm (H x W x D) Interface RS-485, two-wires or four-wires Rail mount DIN 46277 and DIN EN 50022 Baud rate Up to 115.2 kbaud Protocol MODBUS RTU for control unit communication. Filter 0.05 to 75 Hz, selectable bandwidth Non-Linearity <0.005% of range Zero drift <0.0002% of 3,3 mV/V/°C Gain drift <0.0015% of actual value/°C Vishay Nobel AB Box 423, SE-691 27 Karlskoga, Sweden Phone +46 586 63000 · Fax +46 586 63099 info.se@vishaynobel.com · www.vishaynobel.com