Micromod MOD: MODCELL Multiloop Processor 2002N Model C and Associated Hardware - Manual (Page 31)

MODCELL Multiloop Processor
ELECTRICAL CONNECTIONS
3.3 POWER CONNECTIONS
WARNING
Avoid electrical shock. AC power wiring must not be connected at
the distribution panel (ac source) until all wiring procedures are
completed.
All power wiring must be in compliance with the requirements of the National Electrical
Code or Canadian Electrical Code. In any installation where the power source does not
have one side of the line connected as a neutral conductor, both sides of the line must be
overcurrent protected.
The instrument does not contain a power disconnect switch. Install a disconnect switch or
circuit breaker between the instrument and its power source. Choose an accessible
location as near to the instrument as practical, and identify the switch or breaker as the
disconnecting device for the instrument.
Power connections are made to the terminal block, Figure 3-1 for 2002N.
Power specifications for the instrument are:
Operating Range:
AC Option: 85-250 V rms, 50-400Hz
(Complies with EU requirements per Section 1.3.2)
DC Option: 20-50 Vdc
Internal Fuse:
DC Version: 4 amps, 250 V Slow Blow, soldered in
AC Version: 2.5 amps, 250 V Slow Blow, soldered in
External switch or circuit breaker rating:
DC Version: 4 amps, 28 VDC
AC Version: 1 amps, 250 VAC
Power Consumption:
DC Version: 40VA
AC Version: 80VA, 50W
Transient Overvoltages: Classified as Installation (Overvoltage) Category II
per IEC 664 ( Specfies a maxiumum impulse withstand
voltage of 1500 V for phase to earth voltage of 150 Vrms)
AC Power Factor: 0.4 at 250V In 5A Out
Peak Inrush Current: 60 Amps (ac), 40 Amps (dc)
Holdup Time (msec): 32 at 120V ac, 5 at 24V dc typical
3.4 GROUND CONNECTIONS
The primary power ground system consists of the plant electrical ground (equipment
grounding conductors).
3.4.1 Chassis Ground
A desirable chassis ground is the instrument rack or cabinet. The large metal mass of
the rack provides the best noise ground. A ground path between the processor and its rack
is established when the processor is mounted as
described in Section 2.4.
Connect the rack to a ground spike or building steel using the shortest possible length of
large gage wire or wire braid.
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