Cameron NuFlo MC-II, User Manual

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K1 relay
or output module
Jumper W1 Terminal block J1
MC-II Flow Analyzer
Appendix B—Pulse Output Option, Intrinsically Safe
MC-II Pulse Output Circuit Assembly
(Part No. 100005163; Intrinsically Safe)
The pulse output circuit assembly (Figure B1) equips the MC-II Flow Analyzer to provide an optional pulse
output. It is mounted inside the unit between the totalizer board and the battery cavity.
Important—When this circuit assembly is installed according to Figures B2, B3 and B4 (pages 35 and
36), the MC-II with pulse output is rated by Canadian Standards Association as Intrinsically Safe for
Class I, Division 1, Groups A,B,C and D.
Pulse Input - Intrinsically Safe
The pulse input to this card is obtained from the “Pulse Out” of the totalizer card. It will appear in the form of
a square wave pulse.
Pulse Output - Intrinsically Safe
The pulse output from this card is provided in the form of a dry contact from a relay, transistor open-collector,
or an emitter/collector opto-isolated output. A 14-pin socket on the card is provided to install either the relay
or component plug “module”, whichever is specified.
Electrical Specifications - Intrinsically Safe
Current Required 10 mA
Relay Contact Rating 200 mA, 6 VDC
Open Collector Module 200 mA, 6 VDC
Opto-Isolated Module 100 mA, 6 VDC
Pulse Output Duration 60 msec (approx)
Figure B1—Pulse output circuit assembly, intrinsically safe (Part No. 100005163 / 991.44828)
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