Rockwell-automation 1791-XXXX Discrete I/O AC and DC Block I/O Input a Manuel d'utilisateur télécharger pdf (Page 13)

I/O Interface and System Design

Chapter 2

2-3

When selecting devices to use with the block I/O inputs, verify that the

on–state voltage and currents of the device fall into the on–state region for

the block input. Also verify that the off–state current and voltage fall into

the off–state region of the block I/O module (Figure 2.1).

Figure 2.1

dc

Input Specifications

11mA

Minimum offstate = 1.5mA

0

5.0

30

Voltage

Current

On

Off

0

Off

Minimum onstate = 2.5mA

10

On

Undefined or

Transition Region

Figure 2.2

ac

Input Specifications at 60Hz

12.3mA

Minimum offstate = 2.3mA

0

35 132

Voltage

Current

079Off

On

Off

Undefined or

Transition Region

Minimum onstate = 5.0mA

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