Cameron Scanner 2000 microEFM, Руководство пользователя по оборудованию

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A-11
Scanner
®
2000 microEFM Appendix A
Pulse Input
The pulse input provides an optically isolated input for high-amplitude pulse (frequency) signals, which
includes signals from a turbine meter equipped with a preamplifier (Figure A.16, top diagram) or signals from
a positive displacement meter (Figure A.16, bottom diagram).
The Scanner 2000 can calculate flow from no more than two pulse (frequency) inputs at a time. Therefore, a
pulse input can be used simultaneously with only one turbine input (main board or expansion board).
The pulse input can also be used as a status input for monitoring a parameter via Modbus
®
registers. See Pulse
Input for Status Indication, page D-25, for details.
25 26
TB9 TB8
TB7
TB6
TB4
TB5
PULSE INPUT
3 TO 30 VDC
PULSE INPUT (TB8)
Expansion
Board PN:
9A-30160014
25
24
26
23
SWITCH CLOSURE
TB9 TB8
TB7
TB6
TB4
TB5
PULSE INPUT/SWITCH (TB7 &TB8)
TB7 AND TB8 ARE CONNECTED BY JUMPER;
TB7 IS THEN WIRED TO THE SWITCH.
Expansion
Board PN:
9A-30160014
Figure A.16—Pulse input wiring