Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 39)

Chapter 3 - Installation
3-9
Input Power Wiring
WARNING DO NOT OPERATE WITH INCORRECT LINE VOLTAGE. TO DO SO WILL
RESULT IN PROPERTY DAMAGE OR PERSONAL INJURY. CHANGING
THE INPUT VOLTAGE RATING BETWEEN 120 AND 240 VAC REQUIRES
MODIFICATIONS TO THE POWER/RELAY CIRCUIT BOARD AND
RELAY OUTPUT BOARD. THIS PROCEDURE SHOULD ONLY BE DONE
BY AUTHORIZED PERSONNEL. FOR FURTHER ASSISTANCE CONTACT
HARDY INSTRUMENTS, CUSTOMER SUPPORT.
Step 1. The HI 2151/30WC is factory configured to operate from
either 120 or 240 VAC, 50 or 60 Hz power. Check the model
number of your unit to verify the voltage. If the unit is config-
ured for 240 VAC, an "E2" will be printed on the name plate.
Step 2. The power and relay circuit card filters and conditions AC
power. However, for noisy power lines, external conditioning
may be required. Contact Hardy Instruments Customer Sup-
port for more information.
Step 3. The AC power should be supplied by a "clean" primary line,
directly from the power panel. This line should not supply any
other equipment, including the feeding unit, and should be
supplied with a minimum 10 amp breaker.
Step 4. To connect power to the controller, install a 3-wire, minimum
of a 14 AWG power line to the 3-pin terminal block connec-
tor. (See Fig. 3-8)
• Fuse: .5 AMP, 250 VAC Slow-Blow 3AG, located behind
J6 on the power relay printed circuit board.
FIG. 3-8 POWER WIRING DIAGRAM
A Subsid iar y o f Dynamic Instruments Inc.
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