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PRODUCT
Current Loop Communication Expansion Kit
(For LE-8200A/8200)

OP-SB85C

Overview

This expansion kit supports current loop communications. The kit incorporates a communications circuit with photo-coupler isolation and constant-current power supply of insulated type, thus realizing not only monitoring but also easy communications testing with passive or active current loop devices.

[ Circuit block diagram of Input/Output ]

Setting of Dip Switch

Switch No.   OFF ON
1*1 SD side Passive Active
2*2 20mA supply 40mA supply
3*1 RD side Passive Active
4*2 20mA supply 40mA supply

*1) Set OFF for monitoring.
*2) The value of current loop is avaiable, only when “Active” is selected.

[ Connection for Monioring ]
Set ON the dip switch No.1 and 3 of the adapter to make the motion type "Active."

[ Connection for Simulation (active type) ]
Set ON the dip switch No.1 and 3 of the adapter to make the motion type "Active."

[ Connection for Simulation (passive type motion) ]
Set OFF the dip switch No.1 and 3 of the adapter to make the motion type "Passive."

Analog Waveform Analysis

It displays the waveforms at a sampling rate up to 40M for 2 channels and supports ±12V. This function helps to identify hardware problems. You can also use it for educational purpose for people studying data communications.



A probe cable with test clips is attached.