Rockwell-automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual Manual de usuario descargar pdf (Pagina 17)

Publication 1794-UM061A-EN-P - July 2006

1794 FLEX I/O Diagnostic Digital Modules Overview 15

Capabilities of the 1794-IB16D include:

• 61131-2 Type 3 compatible sinking inputs.

• interface with PNP sourcing sensors.

• 10-31.2V dc operating range.

• provides up to 50 mA to power an attached sensor.

• detects for an open wire condition down to 50 μA.

You need a dummy resistor to mask the channel diagnostic function for each

unused sensor port. Used sensor ports must have a 50 μA minimum current

draw with the input field device in both the on- and off-state.

1794-OB16D Diagnostic Output Module Compatibility

You can use FLEX I/O diagnostic output modules to drive a variety of output

devices. Typical output devices include the following.

•Relays

• Solenoids

• Contactors

• Indicators

• Small motor starters

When you design a system using FLEX I/O diagnostic output modules, you

must consider:

• The output must supply the necessary surge and continuous current for

the output device being used.

• When sizing output loads, check the documentation supplied with the

output device for the surge and continuous current needed to operate

the device.

Capabilities of the 1794-OB16D diagnostic output module include:

• sourcing style outputs for loads connected to common.

• 10-31.2V dc operating range.

• provides continuous current of 0.5 A maximum (8 A per module),

2.0 mA minimum per output.

• capable of 2 A surge for 50 ms, repeatable every 2 s.

• protection from short circuit and overload.

You need a dummy resistor to mask the channel diagnostic function for each

unused output channel.

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Rockwell-automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual Manual de usuario Pagina 17