Allen-Bradley 1444-TSCX02-02RB User Manual page 59

• Speed signals that are replicated by an opto-isolated
IMPORTANT
output result in a 180 degree phase shift.
• Some amount of signal delay and phase lag occurs, and is
cumulative per series connected module. See
Table 7 - Signal Delay and Phase Lag
RPM
6,000
30,000
120,000
• For the same speed signal, configure the trigger slope
(positive or negative) the same on all modules including
when using the opto-isolated output to replicate the signal
between modules.
To minimize phase error, we recommend that the trigger
slope is set as the falling edge of the signal (negative).
• The recommended method of communicating speed
signals is to use the TSC over the module local bus
(terminal base interconnect) or from the TSCX buffered
outputs, as that source adds zero signal delay and no phase
lag.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Install the Dynamix 1444 Series Monitoring System
Speed
Rising Edge
Hz Delay Phase Lag
100 40 μs 1.44
500 7.2
2,000 28.8
Chapter 2
Table 7.
Trigger Source
Falling Edge
Delay Phase Lag
4 μs 0.144
0.7
2.88
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