Gps rs-232 digital serial bus (serial port 3), Gps rs-422 digital serial bus (serial port 3), Air data rs-232 digital serial bus (serial port 2) – Honeywell MK VI User Manual
Page 169: Air data rs-422 digital serial bus (serial port 2)
Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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4.2.6.1 GPS RS-232 Digital Serial Bus (serial port 3)
One port is provided for use with external or internal RS-232 GPS interfaces. This port is common with the GPS RS-422
port described in Section 4.2.6.2 and can only function as a RS-232 interface or a RS-422 interface but not both.
Pin Assignment (Signal Mnemonic):
Transmit
Receive
Common
J2-45
J2-29
J2-28
(GPS_TXA)
(GPS_RXA)
(GND)
NOTE: If an internal GPS configuration is used (965-1190-0XX or 965-1220-0XX) then the receive input will be non-
functional.
4.2.6.2 GPS RS-422 Digital Serial Bus (serial port 3)
One port is provided for use with external GPS interfaces. This port is common with the GPS RS-232 port described in
Section 4.2.6.1 and can only function as a RS-232 interface or a RS-422 interface but not both.
Pin Assignment (Signal Mnemonic):
Transmit A leg
Transmit B leg
Receive A leg
Receive B leg
J2-45
J2-46
J2-29
J2-12
(GPS_TXA)
(GPS_TXB)
(GPS_RXA)
(GPS_RXB)
NOTE: If an internal GPS configuration is used (965-1190-0XX or 965-1220-0XX) then the receive input will be non-
functional.
4.2.6.3 Air Data RS-232 Digital Serial Bus (serial port 2)
One port is provided for use with Air Data computer or Static Pressure Sensor interfaces. This port is common with the
Air Data RS-422 port described in Section 4.2.6.4 and can only function as a RS-232 interface or a RS-422 interface but
not both.
Pin Assignment (Signal Mnemonic):
Transmit
Receive
Common
J2-27
J2-11
J2-28
(ADC_TXA)
(ADC_RXA)
(GND)
4.2.6.4 Air Data RS-422 Digital Serial Bus (serial port 2)
One port is provided for use with Air Data computer or Static Pressure Sensor interfaces. This port is common with the
Air Data RS-232 port described in Section 4.2.6.3 and can only function as a RS-232 interface or a RS-422 interface but
not both.
Pin Assignment (Signal Mnemonic):
Transmit A leg
Transmit B leg
Receive A leg
Receive B leg
J2-27
J2-44
J2-11
J2-10
(ADC_TXA)
(ADC_TXB)
(ADC_RXA)
(ADC_RXB)
4.2.6.5 SCI Range RS-422 Digital Serial Bus (serial port 1)
Two ports are provided for use with the SCI range bus interfaces. Port 1 is common with the ARINC 429 channel 1 port
described in Section 4.2.5 and can only function as a RS-422 interface or an ARINC 429 interface but not both. Port 2 is
common with the RS-232 port described in Section 4.2.6.4 and can only function as a RS-422 interface or an RS-232
interface but not both.
Pin Assignment (Signal Mnemonic):
Receive A leg
Receive B leg
Receive A leg
Receive B leg
J2-36
J2-37
J2-10
J2-11
(429/422RX_1B)
(429/422RX_1A)
(232/422RX_2A)
(232/422RX_2B)
Note: SCI Display Range RS-422 bus A and B legs are reversed from ARINC 429.