Emerson MICRO MOTION 2700 Instalační manuál Strana 73

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Transmitter Configuration and Use: Series 1000 and 2000 Transmitters 63
Required Transmitter Configuration continued
Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup
6.6.5 Configuring mode
If both Channel B and Channel C are configured as frequency outputs, they function
as a dual pulse output. In dual pulse mode, the second frequency output can be
phase-shifted either 0°, 180°, +90°, or –90°, or set to Quadrature (the default). See
Figure 6-11.
In Quadrature mode, Channel C:
Lags Channel B by 90° during forward flow.
Leads Channel C by 90° during reverse flow.
Is driven to zero during a fault condition.
Quadrature mode is used only for specific Weights & Measures applications where required by law.
Note: If only one channel is configured as a frequency output,
Frequency Output Mode is set to
Single and cannot be changed.
Figure 6-11 Dual pulse output options
Model 2500 CIO
Model 2700 CIO
Channel B
Channel C
In-phase
50% duty cycle
Quadrature Forward flow
50% duty cycle
Reverse flow
Fault condition
Channel B
Channel C
Channel B
Channel C
Channel B
Channel C
Channel B
Channel C
180
° phase shift
50% duty cycle
90° phase shift
50% duty cycle
–90° phase shift
50% duty cycle
Channel B
Channel C
Channel B
Channel C
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