Issue/Rev. 0.7 (9/18) ║ MN06150 • Page 9
earth grounded. The grounding point should be as
close to the unit as possible. To ensure proper earth
ground:
a) The resistance between the earth ground lug in
the microLoad.net and the grounding point must
not exceed 2
Ω
.
b) The proper grounding point is a ½" to ¾" diameter
copper stake that extends into the water table.
Where this is not practical, a ground plane may
be used.
Note:
Electrical conduit, piping, and structural steel are
not considered proper grounding points for equipment using
electronics.
c) No other devices, except the microLoad.net
and ancillary equipment such as load printers,
should be connected to any point in the ground-
ing circuit.
Section II – Pre-Installation Considerations
8. All user wiring is terminated at compression-type
screw terminal strips. These terminal strips may be
removed from the microLoad.net MACF and MNET
circuit boards to facilitate ease of wiring. Once wir-
ing is complete, the terminal strips are then “plugged
into” their respective positions on the circuit boards.
9. If external relay permissives are used in series with
microLoad.net AC digital outputs, an RC network
must be placed in parallel with the permissive to
prevent a false turn-on of the microLoad.net digital
outputs. Recommended RC network = 0.1 UF
capacitor and a 680
Ω
resistor (Electrocube part
number RG 2031-11).
10. Interposing relays must be installed between the
pump controller, alarming device, and the micro-
Load.net permissive sense relays. Permissive
sense inputs are DC voltage.
Содержание Smith Meter microLoad.net
Страница 13: ...Issue Rev 0 7 9 18 MN06150 Page 13 Section IV Diagrams Figure 3 Opening microLoad net ...
Страница 16: ...Page 16 MN06150 Issue Rev 0 7 9 18 Section IV Diagrams Table 6 microLoad net I O Configuration Worksheet ...
Страница 29: ...Issue Rev 0 7 9 18 MN06150 Page 29 Section IV Diagrams Figure 16 RS 232 Shared Printing ...
Страница 30: ...Page 30 MN06150 Issue Rev 0 7 9 18 Section IV Diagrams Figure 17 RS 485 Shared Printing ...
Страница 37: ...Issue Rev 0 7 9 18 MN06150 Page 37 Section IV Diagrams Figure 24 AC Digital Outputs ...
Страница 40: ...Page 40 MN06150 Issue Rev 0 7 9 18 Section IV Diagrams Figure 26 Sample Application Worksheet ...
Страница 41: ...Issue Rev 0 7 9 18 MN06150 Page 41 Section IV Diagrams Figure 27 Sample Application AC Wiring ...
Страница 43: ...Issue Rev 0 7 9 18 MN06150 Page 43 Section IV Diagrams Figure 29 Sample Application Power Wiring ...
