P
AGE
10
2.6.1 ELECTRICAL CONDUIT OPENINGS
The instrument case will have 3 or 4 conduit openings, depending upon the number of outputs
specified. To help minimize electrical noise that may adversely affect the operation of the
instrument, the wires indicated below should be routed through the conduit opening specified.
See Figure 2-1 (page 8) for conduit opening locations.
EC1 -
AC power
EC2 -
Analog input and mAdc outputs
EC3 -
SPST, SPDT relay or SSR driver outputs
EC4 -
SPST, SPDT relay or SSR driver outputs
(provided when > 4 relays & SSR's are specified)
Unused conduit openings should be sealed if exposed to the environment.
2.6.2 AC POWER WIRING CONNECTIONS
WARNING: To avoid electrical shock AC power wiring must not be
connected at the source distribution panel until all wiring connections are completed.
FIGURE 2-3
AC Instrument Power Input
Connect the 115 VAC hot and neutral to terminals 1 and 2 respectively of TB1. See Figure 2-
2 (page 9) for Terminal Board locations on the instrument. Connect the 230 VAC one leg to
each terminal, be sure to check the position of the Voltage Selector switch provided with 230
VAC instruments. The switch position must match the voltage input to the instrument.
1 2
TB1
Connect the AC
ground at the
green ground screw
on the left side of
the inside of the
case
Line 1
Line 2
Summary of Contents for MRC 7800
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