Kistler-Morse KM Weigh II - Manual (Page 10)

The Weigh II enclosure has no openings
through which to route cables or install
conduit. Before you begin wiring, drill entry
holes through the enclosure where it is most
convenient to route your conduit or cables.
Hole location is critical for proper PCB
installation. Check clearances to ensure
fittings and wire routing will not interfere with
the motherboard, option cards, or enclosure
door. Refer to the following drawings in
Appendix F for locations and wiring of the
optional PCBs:
• 4-channel multivessel PCB —
TI-SP.W2-03
• 5-channel or 8-channel Setpoint PCB —
TI-SP.W2.RLY-01
• 2-channel, 4-channel, or 8-channel Current
Transmitter PCB (for use only with the AC
power version of the Weigh II) — TI-
SP.W2.XMIT-01
• Combi-Card PCBs for Setpoint and Current
Transmitter functions —
TI-SP.W2.CMB-01 (AC version) or
TI-SP.W2.CMB-02 (DC version)
• Remote Tare PCB (up to 4 channels) —
TI-SP.W2.RTI-01
• Allen-Bradley RIO PCB — refer to A-B RIO
Manual for Sonologic II and Weigh II
• Profibus DP — refer to Profibus Interface
Manual for Ultra-wave, Sonoglogic II/Weigh
II.
Wiring Power
WARNING
When connecting power to the
Weigh II, adhere to the following:
• Power wiring must comply with
the national wiring requirements
for the country in which the
equipment is installed.
• The ground conductor must be
connected to the Protective Earth
(PE) terminal.
The specifications of the power supply for the
Weigh II are as follows:
AC-Powered Versions
• 100 VAC, or
• 115/230 VAC switch selectable
DC-Powered Version
24 V ± 10% 2A
Refer to the following drawings in Appendix F:
TI-SP.W2-02 for single-point system or
TI-SP.W2-03 for multi-point system. The
wiring procedure for connecting the external
power source to the Weigh II follows:
1. Route the cable from the power source to
TB1 on the motherboard.
2. Connect the Ground lead to the ground
terminal, the Hot lead to the ‘L’ terminal,
and the Neutral lead to the ‘N’ terminal.
Note
The standard lead colors for AC power
in North America are:
• Ground = Green
• Hot = Black
• Neutral = White
3. Restore the power supply.
4. Turn On the On/Off switch (SW1) in the
Weigh II and verify that the LCD activates.
If the LCD does not activate, check that
the wiring is correct and that the power
supply meets specifications.
Wiring for Optional PCBs
Refer to the PCB drawings listed above for
wiring the optional PCBs.
Note
See TI-SP.W2.02 (single-point) or TI-
SP.W2.RTI-01 (multi-point) in Appendix
F, Technical Drawings for wiring details
for the Weigh II’s remote tare function.
To tare the vessel from the remote
station, hold the remote tare push
button for 1 second.
Sealing Openings
in Enclosure
After you have completed installation of the
conduit and cables, seal around the openings
in the Weigh II enclosure to prevent moisture
seepage. Use Sikaflex 1A polyurethane
sealant or RTV 738.
CAUTION
Only use Sikaflex 1A polyurethane
sealant or RTV 738. Other sealants
may contain acetic acid, which is
Chapter 2. Hardware Installation
2-2