Eia-485/eia-232 interface (com 1), connector j1, Com 1), c – Comtech EF Data UT-4500 Series User Manual
Page 39
UT4500 Series Up Converter
MN/UT4500.IOM
Installation
Revision 2
21
2.4.2 EIA-485/EIA-232 I
NTERFACE
(COM 1), C
ONNECTOR
J1
The EIA-485/EIA-232 Interface connector, J1, is 9 pin "D" type DB9F connector socket.
The pin-out specifications for EIA-485 are contained in Table 7 and Table 8. The
specification for EIA-232 is contained in Table 9. The mating connector is a DB9M.
Table 7. J1, 2 Wire EIA-485 Interface Pin-Out
Table 8. J1, 4 Wire EIA-485 Interface Pin-Out
Pin #
Description
1 GND;
Ground
2
3
4 +RX/TX;
Signal
5
-RX/TX; Signal Complement
6
7
8 +RX/TX;
Signal
9
-RX/TX; Signal Complement
Pin # Description
1 GND;
Ground
2
3
4 +TX;
Signal
5
-TX; Signal Complement
6
7
8 +RX;
Signal
9
-RX; Signal Complement
Note: Pins 8 & 9 are the loop to the next
converter.
Table 9. J1, EIA-232 Interface Pin-Out
Pin # Description
1
2 TD;
Transmit
Data
3
RD; Receive Data
4
5 GND;
Ground
6
DSR; Unit Ready - always high.
7
RTS; Request to Send. Looped to CTS.
8
CTS; Clear to Send
9