Rockwell Automation 1440-VAD02-01RA XM-123 Aeroderivative Module - Manual (Page 32)

Publication GMSI10-UM003D-EN-P - May 2010
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Figure 2.11 Relay Connections for De-energized Relay Circuit
Figure 2.12 Relay Connection - Failsafe, Alarm Condition
Non-failsafe, Nonalarm Condition
Connecting the Tachometer Signal
The XM-123 provides a single tachometer input signal. The signal processing
performed on the tachometer signal depends on the configuration of the
module. See page 57 for a description of the tachometer parameters.
IMPORTANT
If you are not using the tachometer input, set the Pulses
per Revolution parameter to zero (0). This will disable the
tachometer measurement and prevent the module from
indicating a tachometer fault (TACH indicator flashing
yellow). A tachometer fault occurs when no signal pulses
are received on the tachometer input signal for a relatively
long period.