AE–1800 Instruction Manual
Installation
7.3.2. Connector Pin Assignments and Connections
(
continued
–
3/8
)
⑤
RS–422
Connector
Connections from an IBS/INS device are to be plugged into this receptacle. A
D–Sub 9 female type plug mates with this connector. The pin assignments are
illustrated below.
Figure 7-9
RS–422
Connector Pin Assignments (Front View)
NOTES:
(1) This interface consists of a MAX3490 RS–422 transceiver. Brief specs. are given
below. For details, see the parts manufacturer’s ( MAXIM ) data sheets.
-
Input High Voltage : 2V (min.), Input Low Voltage : 0.8V (max.)
-
Input Current ( signal lines A & B ) : 1.0 mA @12V, –0.8 mA @ –7V
-
Receiver Input Impedance: 12 k
Ω
(2) Pins #1, #2, #3 and #4: No internal connections (
NC
)
(3) Input lines (pins #6 and #7) are insulated from ship’s ground by opto–isolators.
・
Mating
Plug:
HDEB–9S
(supplied) or equivalent
After making connections, check to be sure that the
RS–422
port is enabled (as per
paragraph 4.12.2) and that a correct set of parameters is selected (as per
paragraphs 4.12.3 and 4.12.4) for your applications.
The command formats used to control communications with an INS/IBS device are
given in paragraph 7.4.
(
continued on next page
)
Pin # 1 (NC)
Pin# 5 (
GND
)
# 6 (
R X
+
), Sig. Line A
# 9 (
TX–
),
Sig. Line B
# 7 (
R X –
), Sig. Line B
# 8 (
T X
+
), Sig. Line A
