Rockwell Automation 1791-XXXX Discrete I/O AC and DC Block I/O Input and Output Modules User Manual

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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

ЙЙЙЙЙЙ

ЗЗЗЗЗЗЗЗЗЗЗЗЗЗЗ

11mA

Minimum offĆstate = 1.5mA

5.0

Voltage

Current

Off

Minimum onĆstate = 2.5mA

Undefined or

Transition Region

Figure 2.2

ac Input Specifications at 60Hz

12.3mA

Minimum offĆstate = 2.3mA

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