ABB UFC760BE142 3BHE004573R0142 PLC board high voltage interface board module

Description

UFC760BE142 Each channel can be configured as either active or inactive.

If a channel is Inactive, its output is 0V and the analog output data for the channel is not used.

Alarm (optional discrete input) data for the channel is not updated for a channel that has been

configured as Inactive.

UFC760BE142 If the configuration of a channel is changed from Active to Inactive, the module stops updating its

alarm data. Pre-existing alarms can still be cleared using the module’s configured discrete output

bits.

UFC760BE142 In addition to being able to configure data defaults of zero or hold last state for the module’s data in

the BIU, local output defaults for the module are also configurable. These module local defaults

determine whether the module will set the actual output voltages to zero volts or hold their last

values if a module error occurs.

Hold Last State

If the output default of a channel is Hold Last State and user power is present, the channel output

holds its last value if:

1. The BIU resets the module.
2. No output data is received from the BIU within the BIU Timeout period.
3. Backplane power is lost.
4. The module’s watchdog timer expires.

Outputs will continue to UFC760BE142 hold their last states until the module receives output data from the BIU or

until user power is removed.

Scaling defines the constant-slope mapping from the value in engineering units sent by the BIU to a

channel’s output voltage. There are two preset scaling ranges: +/-10 volts and 0 to 10 volts.

UFC760BE142 The default range selection of +/-10 volts is for bipolar scaling. Both the span and engineering units

can range from -10,000 to +10,000 millivolts.

The other preset range, 0 to +10 volts is for unipolar scaling, gives both span and engineering units

of 0 to +10,000 millivolts.

The illustration below represents the two preset ranges.

After selecting either the bipolar or unipolar range (see above), scaling for each point can be

customized by changing its high or low engineering units and/or output (span) values.

The scaling values selected do not restrict the hardware output range.

Instrumentation grade Shielded Twisted Pair UFC760BE142 wire should be used for best noise immunity. The

shield should be terminated at a local panel ground near the module. The following illustration

shows typical connections for this module.

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