AB Rockwell PLC module 1747-BA

AB Rockwell PLC module 1747-BA

Technical data of product parameters

These bits 1747-BA are not defined in the Configuration register and will be read
as high in the Status register. These bits cannot be accessed by the Controller during a write to the module.
Bit 6: This bit is reserved.
Bits 7-8: These bits are not defined in the Configuration Register. These bits cannot be accessed by the Controller during a write to the module.
Bit 7: This bit is reserved.
Bit 8: This bit is set in the Status Register if the +48V supply on the FCI board 1747-BA
fails.
Bit 9: The GND Fault Attention Enable bit is “0” after the Compact Contact
Input module power is cycled. This bit must be set by the Controller if
a ground fault is to be treated as a catastrophic failure. If Bit 9 is set, a
ground fault will cause an attention status to be returned to the Controller upon accessing the module, and no point data can be read. If the bit
is not set, a ground fault will not inhibit the Controller from reading 1747-BA
point data. In the latter case, if more than one ground fault occurs on the
field wiring to a Compact Contact Input Module, false point data may
possibly be read on channels with open contacts.The Digital Input module contains 16 channels where each channel has voltage
level sensing circuitry used to detect whether an input is on or off. The module is 1747-BA
available with 16 isolated differential inputs, or 16 single-ended (common return)
digital inputs with on-card blown fuse detection for the auxiliary power supply. The
selection of the personality module determines if the inputs are differential or
single-ended. The input voltage level monitored by the module is determined by the
particular card group in the module.

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