E/M Series

 

DAQ Device

SCC-CO20

+ –

AO (X )

AO GND

3

15 V iso

2

1

I

Figure 1. SCC-CO20 Signal Connections to E/M Series DAQ Device

Using the Isolated Loop Supply of the SCC-CO20

You can connect the SCC-CO20 to a load using either the isolated internal loop supply or an external supply. The internal loop supply outputs a voltage of 15 V with respect to the isolated ground reference. When using the internal loop supply, the compliance voltage is 12.5 V. This allows for a maximum load resistance of 625 Ω at 20 mA. Figure 2 shows how to connect the SCC-CO20, using the internal loop supply, to a nonreferenced (floating) load and to a load with a high common-mode voltage.

SCC-CO20

 

 

 

 

3

SUPPLY

+

 

 

 

 

 

 

 

 

0–20 mA

Load

15 V iso

–

 

 

2

 

 

SINK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

I

SCC-CO20

 

 

 

3

SUPPLY

+

 

 

 

 

15 V iso

0–20 mA

–

 

2

 

 

 

 

 

SINK

 

 

 

 

 

 

 

 

 

 

 

 

 

1

I

Load

+ –

High

CMV

Figure 2. Connecting the SCC-CO20 Using the Internal Loop Supply

SCC-CO20 Isolated Current Output Module User Guide

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