Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 42)

HI 2151/30WC MANUAL
3-12
• Momentary Functions require 100 mSEC or greater contact to
ground for proper activation. Use remote functions ground only for
activating remote functions.
• For the -WS wall-mount version, route the wiring to J2 through the
enclosure access hole (upper left side when facing the front).
CAUTION REMOTE FUNCTIONS ARE NOT ISOLATED. DO NOT BUNDLE WIRING
FROM REMOTE FUNCTIONS WITH POWER CABLE, RELAY CABLE OR
WITH ANY OTHER HIGH ENERGY CABLES. USE SHIELDED CABLE 50”
OR LESS. TO DO SO MAY RESULT IN UNSTABLE PERFORMANCE.
Load Cell/Point
Connections (J1)
About Load Cell
Wiring The unit is capable of powering a maximum of eight 350 ohm load
cells/points. If more than eight load cells/points are used, an external
power supply is required. Figures 3-9, 3-10, Load cell/point connec-
tions (J1) shows how to connect a full six-wire hookup, a four-wire
hookup, and an external excitation supply. Load cell/point cables are
connected to J1 through a furnished mating plug, P1.
NOTE: Contact Hardy Customer Support for installation information when using an external
power supply.
To ensure a "clean" signal from the load cells/points, follow these pre-
cautions :
• Load cell/point cables MUST be run separate from all other cables
and in their own conduit. Load cell/point cable shield should be
attached to ground screw on rear panel only.
• Six-wire, shielded load cell/point cable should be used for lengths
of 50 feet or more or if intrinsic safety barriers are used. Eight-wire
shielded cable, preferably Hardy C2 cable, must be used for C2 cal-
ibration.
• Avoid load cell/point cable splices. If cables are longer than needed,
coil up and tape excess cable. If cables are short, use an appropriate
junction box. When terminal lugs are installed on load cell/point
cables, Hardy Instruments recommends the lug be crimped and sol-
dered.
• When connecting the HI 2151/30WC weight controller to the HI
215IT junction box using C2 load cell/point cable (6020-0001), use
the following color code:
WARNING DO NOT OPERATE AT INCORRECT LINE VOLTAGE; THE UNIT WILL
BE DAMAGED. CHANGING THE INPUT VOLTAGE RATING BETWEEN
Model Exc + Sen + Sig + Sig - Sen - Exc - C2 + C2 -
J-BOX RED BLUE GRN WHT BROWN BLK GREY VIO
TABLE 3-2: C2 CABLE COLOR CODE