Spectrum-controls 1746sc-INI4vi Bedienungsanleitung PDF herunterladen (Seite 22)

18 SLC 500

™

Isolated Analog Input Modules

Figure 2. Wiring schematic for 2-, 3-, and 4-wire analog inputs

Important: Your module does

not

provide power for analog inputs. Use a power supply

that matches the transmitter specifications.

Module channel

In +

Common -

Power +

Supply -

Transmitter

+ -

2-Wire Transmitter

Module channel

In +

Common -

Power +

Supply -

4-Wire Transmitter

Module channel

In +

Common -

Power +

Supply -

3-Wire Transmitter

Transmitter

Supply Signal

GND

Transmitter

Supply Signal

+ +

- -

Figure 3. Wiring schematic for single-ended analog inputs

Important: With single-ended inputs, the channels are not isolated from each other.

Also, single-ended inputs are less immune to noise than differential inputs.

V in 0 +

I in 0 +

Common 0 -

Shield

V in 1 +

I in 1 +

Common 1 -

V in 2 +

I in 2 +

Common 2 -

Shield

V in 3 +

I in 3 +

Common 3 -

Power +

Supply -

Transmitter

Signal

Transmitter

Signal

Transmitter

Signal

Transmitter

Supply Signal

GND

Input Module

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 57 58

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