Page 28 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
MPU Series C I/O/M Manual
UMCB – Ultrasonic Meter Control Board
NOTE:
Reference the product specification sheets for technical specifications of the I/O.
Note in diagrams below:
Customer Wiring / Equipment
=
4.1.3.
Digital I/O
Connections for the digital I/O are made on the UMCB board using terminal CN2 and CN3
4.1.4.
Digital/Pulse Output
The pulse output connections are made using terminal CN3 as follows:
Function
Connection Port
Digital/Pulse Out #1
CN3 - Terminal 4 and 6
Digital/Pulse Out #2
CN3 - Terminal 5 and 6
Pulse Out #2 is 90 electrical degrees out of phase with Pulse Out #1.
For forward flow, Pulse Out #2 lags Pulse Out #1.
For reverse flow, Pulse Out #2 leads Pulse Out #1.
The pulse outputs can be configured to act as active outputs or pseudo open collectors.
They are “pseudo” because the two output grounds are not isolated from each other.
1
2
3
4
5
6
CN3
ISO GND
Digital Outputs - Active Output Mode - Preferred
GND
Digital/Pulse Input
Unregulated
+VDC
(from CN1)
SW600
SYS
GND
ISO
GND
- OR -
Note:
Customer can power Active Outputs with higher or lower
voltage by setting both positions of SW600 to OFF and connecting
external power supply between CN3 Positions 3 and 6.
Note: If using dual pulse output the two conductors carrying the
outputs must not be in the same pair and ideally are individually
shielded.
EARTH
*Out2/B is wired identically between Positions 5 and 6
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GND
Digital/Pulse Input
1
2
3
4
5
6
CN3
ISO GND
Unregulated
+VDC
(from CN1)
SW600
SYS
GND
ISO
GND
Ga
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Ga
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EARTH
GND
NOTE:
Customer can power Active Outputs with higher or lower voltage by setting both
positions of SW600 to OFF and connecting external power supply between CN3
positions 3 and 6.
NOTE:
If using dual pulse output the two conductors carrying the outputs must not be
in the same pair and ideally are individually shielded.
Содержание Smith Meter MPU 1600c
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