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PD 3230/3235 WEIGHT TRANSMITTERFEATURES
APPLICATION The Weight Transmitter is one of a collection of distributed process control units, intended for use within the P-NET fieldbus system. It provides a versatile interface between weighing elements, the associated digital elements such as valves, switches, motors etc. and the P-NET fieldbus.
Compact design and outstanding environmental specifications makes the Weight transmitter an ideal process component in industrial as well as other environments.
SYSTEM DESCRIPTION The Weight Transmitters are provided with 1 Service channel, 1 Weight channel, 4 Digital I/O channels, 2 Digital Input channels and an internal user programmable Calculator channel. The Weight Transmitter types PD 3230 and PD 3235 have identical specifications except for their load cell paralleling capacity which is min 60 / 30 Ohms load resistance respectively.
The unit offers comprehensive self-testing features, which enables reporting of disconnection, overload and process failure. All outputs are protected against overload. The selectable watchdog timer ensures the safe shut down of a process during a communications or power failure.
SPECIFICATIONS (all specifications are respected in the approved EMI conditions) Weight Channel Digital Input Channels Load resistance min. 60 Ohm (PD 3230) Switch input nom. 24 V DC Load resistance min. 30 Ohm (PD 3235) Frequency max. 50 Hz Sensitivity 2 mV ± 0.2 % Linearity error max. 0.02 % Digital Output Channels Readout interval 0.1/0.2/0.5/1/2/5 s Voltage nom. 24V DC Averaging (Av) 0.1 - 160 s Current max. 1A Resolution typ. 10 000 d (Av: 0.1 s) Resolution typ. 100 000 d (Av: 1.0 s) Scale Drawing (in mm) Input frequency for belt weight 0 - 100 Hz
Power Supply Voltage 24 V DC ± 15 % Consumption
max. 5 W Operation -25 to +70 °C Storage -40 to +85 °C Humidity max. 95 %
APPROVALS Approved in compliance with the EMC-directive no 89/336/EEC. Test limits are determined by the generic standards EN 50081-1 for emission and PrEN 50082-2 for immunity. Approved in compliance with the IEC 68-2-6 Test Fc standard for vibration. The PD 3230 Weight transmitter is a part of the PD 3230/ PD 4000 pattern approved non-automatic weighing system according to EN 45501 class III and IIII ( Refer to PD Manual 502 073).
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