Campbell SDM-SIO4 Bedienungsanleitung PDF herunterladen (Seite 2)

Synchronous Devices for Measurement (SDMs) are

addressable peripherals that expand the datalogger’s

measurement and control capabilities.  is function-

ally diverse group of peripherals operate somewhat

independently of the datalogger, yet expand its mea-

surement and control capabilities.

 e datalogger typically requests, processes, and

stores data from the SDM. In control applications, the

datalogger can then send a controlling SDM updated

control signals to react to changing conditions in the

application. Multiple SDMs, in any combination, can

be connected to one Campbell Scienti c datalogger.

 e SDM port is speci c to our dataloggers and acts

as a high-speed data exchange mechanism. On the

CR3000 and CR5000 dataloggers, the ports are labeled

SDM-C1, SDM-C2, and SDM-C3. On the other data-

loggers, the ports are labeled C1, C2, and C3.

Brief descriptions of our SDM models as well as some

peripherals that are used with our SDMs are provided.

More in depth descriptions and speci cations are

available from our product brochure for the individual

SDM models. A chart on page 6 shows the dataloggers

in which individual SDM models are compatible.

SDM-AO4A Four-Channel Continuous Analog Output Module

 e SDM-AO4A includes four independent, continu-

ous, analog outputs for proportional control or driv-

ing strip charts. Measured or processed values in the

datalogger are scaled to millivolts and transferred to

the SDM-AO4A as digital values. It then performs

a digital-to-analog conversion and outputs an ana-

log voltage signal.  e SDM-AO4A has two voltage

ranges (±5 Vdc and 0 to 10 Vdc) and two operation

modes (synchronous and sequential).

 e SDM-CAN interface allows a Campbell Scienti c

datalogger to sample data directly from a CANbus

communications network. CANbus data can be stored

(and synchronized) with other data values measured

directly by the datalogger, allowing testing and veri-

 cation of CANbus-based data alongside measure-

ments made independently via the datalogger’s input

channels.  e SDM-CAN also supports transmission

of data onto a CANbus network.  e CANbus pro-

tocol is used in a number of networking applications,

including vehicle data acquisition systems (VDAS).

SDM-CAN Datalogger to CANbus Interface

SDM Overview

1 2 3 4 5 6 7 8

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