MadMan NTWB2 Installation & User Manual - page 12
NTWB2
INSTALLATION & USER MANUAL
Rev 1.0
Page | 12
8.3 Terminal Designations
Refer to
Table 3
below for the terminal designations.
Table 3 - Terminal Designations
8.4 12V Supply Wiring
The NTWB2 requires a fused 12V supply to be provided to it in order to operate. An internal,
automatically resetting fuse protects the NTWB2 but an external fuse or circuit breaker must be
provided to protect the wiring to the NTWB2.
Connect +12V to either of the terminals labelled ’12 V’. The 12V supply should be provided from a
switch or circuit breaker to switch it off the NTWB2 when it is not needed and also to enable
isolation when wiring. There is no on/off switch on the NTWB2 itself, however the NTWB2 can be
disconnected by removing the green plug-in connector.
The NTWB2 has a second set of +12V terminal and 0V terminals which allows for 12V supply wiring
to a second device. The terminals are connected internally and so the connector must be plugged
into the NTWB2 for the 12V supply to be present on the second set of terminals.
Note: the internal fuse only protects the NTWB2 and does not protect any other devices connected to
the green connector!
Terminal Function
Comment
12 V
+12Vdc
Supply +12Vdc to this terminal from a switched circuit.
12V
+12Vdc
(Connected internally to other 12V terminal)
0V
0Vdc
Connect this terminal to battery 0Vdc.
0V
0Vdc
(Connected internally to other 0V terminal)
IN 1 +
NMEA A/+
NMEA 0183 Input 1 + (fixed at 4800 baud)
IN 1 -
NMEA B/–
NMEA 0183 Input 1 –
IN 2 +
NMEA A/+
NMEA 0183 Input 2 + (selectable baud rate – see DIP switch 1)
IN 2 -
NMEA B/–
NMEA 0183 Input 1 –
OUT +
NMEA + Output NMEA 0183 Output + (selectable baud rate – see DIP switch 2)
OUT -
NMEA – Output NMEA 0183 Output –
Figure 6 - 12V Supply Terminals
12
V
12
V
0
V
0
V
+
-
+
-
+
-
IN 1
IN 2
OUT