Manual revision 017
Section 4: Mounting and Wiring System
SBE 33
31
Power to SBE 33
Verify that the SBE 33 back panel power selector switch is in the correct
position for your mains power source. Connect power to the
AC Input
connector on the SBE 33 back panel using the supplied cable.
NMEA Navigation Device to SBE 33
Connect the NMEA navigation device to
NMEA Input
on the SBE 33 back
panel with the supplied 2-pin connector (MS3106A12S-3S). The connector pin
designations are:
SBE 33
Function
Pin A
NMEA
A
(signal)
Pin B
NMEA
B
(signal return)
Surface PAR Sensor to SBE 33
Connect the Surface PAR sensor to
PAR Input
on the SBE 33 back panel.
A 4-pin connector (MS3106A14S-2P) was supplied if a cable was not
provided. The connector pin designations are:
Deck
Unit
Function
Biospherical Surface
PAR Sensor with
Switchcraft Connector
Pin A
Signal (ground)
Pin 3
Pin B
Power (+12 volts)
Pin 4
Pin C
Power (ground) – SBE 33 with NMEA
PCB Assembly 40785b/40786b or
greater use pin C. All previous versions
do not use pin C.
Pin 1
Pin D
Signal
Pin 2
-
-
Pin 5
Note
: Biospherical sold the Surface PAR sensor with other connector types in
the past. See the appropriate drawing for pinout details if your sensor does not
have a Switchcraft connector.
WARNING!
Some oceanographic vessels
isolate (un-ground) the AC power
ground circuit. If the SBE 33 is
being installed on a vessel with an
isolated AC power ground, a secure
separate ground connection must
be made between the SBE 33
chassis and the ship’s hull for
SAFETY REASONS.
Attach the hull
connection to the protective
earthing terminal located on the
back panel of the SBE 33 using at
least 20 AWG wire and a ring
terminal.
CAUTION:
Connecting an SBE 33 set for
120 volts to a 240 volt power supply
will cause severe damage to the
SBE 33.
Note:
NMEA and Surface PAR channels
were optional in earlier versions of the
SBE 33.
Note:
SBE 33 can also be used with a
Satlantic (Sea-Bird Scientific) Surface
PAR sensor. Wiring diagram for that
cable is not currently available.
