rev A
MNL-7178.docx
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3
I
NSTALLATION
3.1
M
ECHANICAL
The indicator must be mounted overhead on a flat surface strong and stiff enough to isolate
the device from vessel vibrations without excessive flexing. Choose a location that has
sufficient sight lines from all areas within the bridge. Allow enough space at the back of the
meter to permit the cable entries.
The indicator is equipped with (4) four clearance holes for #10 (M5) screws or bolts inserted
from underneath for direct mounting to the ceiling. Ensure the unit is securely fastened,
preferably with an anaerobic thread locker such as Loctite 243.
Refer to Appendix A: Installation Dimensions for physical dimensions.
3.2
E
LECTRICAL
The 7178 indicator is equipped with two cable glands with which to make the electrical
connections. Use 0.20 inch [5 mm] to 0.47 inch [12 mm] OD cable with 18 AWG conductors
for external connections to the power supply and rudder feedback unit. The RFU cable must
be twisted pair, and shielded to protect the signal integrity. Use ferrules on the cable ends
for all wire connections.
All terminal wire connections to the meter should made using
crimped ferrules to ensure a secure connection for high-vibration
environments.
The 7178 indicator uses a nominal supply voltage of either 12VDC or 24VDC, depending on
the configuration selected. Use a regulated, clean, and reliable source to power the 7178
indicator.
Plug connectors are supplied on the board of the indicator for making the connections to the
circuit board. Power connections are made at connector P4 whereas the potentiometer input
from the RFU is made at connector P3. Rudder Feedback Unit signals shown in the following
figures are provided by standard Kobelt RFUs. Please review the Kobelt website for all RFU
options available.
A circuit breaker of 2A is required between the vessel power supply
source and the indicator(s) as shown in the example installation
diagrams.
