Sensoray 2518 Bedienungsanleitung PDF herunterladen (Seite 6)

Sensoray Model 2518/2519 Ethernet Smart A/D™ 3 Introduction

2.2 Product Features

q Remote operation on any 10BASE-T Ethernet

network.

q Up to 4096 sensor channels per network, using up to

256 distributed Ethernet Smart A/D™ units.

q High-performance dedicated network processor with

optimized TCP/IP stack delivers up to 1400

transactions per second.

q On-board DC-DC converter requires only a single

12V to 24V AC/DC input power source.

q Robust, pluggable screw terminal blocks support

direct sensor connections.

q Network watchdog timer monitors Ethernet activity.

q Embedded processors off-load computationally

intensive data acquisition functions from the client.

q Each sensor channel may be dynamically configured

to accept any supported sensor type.

q Fully differential sense inputs help to eliminate

ground loops.

q All sense inputs are protected from high differential

and common mode voltages.

q Pulsed excitation provided for thermistors, resistors,

RTDs and strain gages. Pulsed excitation minimizes

sensor self-heating and helps to reduce system power

consumption.

q Sensor excitation signals are electrically separate

from the sense inputs so that high accuracy

three-wire or four-wire circuits may be implemented.

q Automatic reference junction compensation provided

for thermocouples. Integral compensation sensors

occupy dedicated measurement channels so that all

process sensor channels remain available for

application use.

q Programmable alarm thresholds for each channel. A

single Alarm flag enables the rapid detection of limit

violations without burdening clients with sensor data

evaluation.

q High quality internal reference standards for

excellent long-term stability and accuracy.

2.3 Block Diagram

Figure 2: Model 2518/2519 Block Diagram

12 to 24VDC

Excitation

Generator

Digitizer

Excitation

Mux

Sense

Mux

Reference

Standards

Ethernet

µComputer

Ethernet

Interface

Model 518 Smart A/D™ (2518/2519)

PC/104 Bus

Network

Processor

Model 518 Smart A/D™ (2519 only)

Screw

Terminals

Model 2509 Ethernet Base Unit

Temp.

Sensor

Process

Sensors

Power

Supplies

1 2 3 4 5 6 7 8 9 10 11 ... 29 30

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