Emerson 3412 User Manual
60
FREQUENCY/DIGITAL OUTPUTS
Section 3: Electrical installation
Daniel 3410 Series Ultrasonic Gas Flow Meter Installation Manual
June 2014
3-9000-759 Rev D
Frequency or Digital Outputs (FODO 3) source
•
FO1A, DO1A, FO1B, DO1B, FO2A, DO2A, FO2B, DO2B
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FO1A, DO1A, FO1B, DO1B, FO2A, DO2A, FO2B, DO2B
•
Frequency output 1A is based on frequency content (Actual - Uncorrected Flow Rate)
•
Frequency output 1B is based on frequency content and Frequency 1B Phase
•
Frequency output 2A is based on frequency content (Actual - Uncorrected Flow Rate)
•
Frequency output 2B is based on frequency content and Frequency 2B Phase
•
Digital output 1A is based on Digital output 1A content (Frequency 1 Validity and Flow
Direction)
Direction)
•
Digital output 1B is based on Digital output 1B content (Frequency 1Validity and Flow
Direction)
Direction)
•
Digital output 2A is based on Digital output 2A content (Frequency 2 Validity and Flow
Direction)
Direction)
•
Digital output 2B is based on Digital output 2B content (Frequency 2 Validity and Flow
Direction)
Direction)
Mode options
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Open Collector (requires external excitation supply voltage and pull-up resistor)
•
TTL (internally powered by the meter 0-5 VDC signal)
Channel B Phase options:
•
Lag forward, Lead reverse (Phase B lags Phase A while reporting forward flow, leads Phase
A while reporting reverse flow)
A while reporting reverse flow)
•
Lead forward, Lag reverse (Phase B leads Phase A while reporting forward flow, lags Phase
A while reporting reverse flow)
A while reporting reverse flow)
Phase A and Phase B output (based on flow direction)
•
Reverse flow - output only reports flow in the reverse direction. For frequency outputs,
Phase B of the output is 90 degrees out of phase with Phase A.
Phase B of the output is 90 degrees out of phase with Phase A.
•
Forward flow - output only reports flow in the forward direction. For frequency outputs,
Phase B of the output is 90 degrees out of phase with Phase A.
Phase B of the output is 90 degrees out of phase with Phase A.
•
Absolute - output reports flow in both directions. For frequency outputs, Phase B of the
output is 90 degrees out of phase with Phase A.
output is 90 degrees out of phase with Phase A.
•
Bidirectional - output reports flow on Phase A only in the forward direction and on Phase
B only in the reverse direction.
B only in the reverse direction.