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D-Sub 15-pin connector
The RB900-Pro terminal is equipped with a D-Sub DE15F 15-pin connector to control
the RS232 interface, RS232 AUX/Debug/MCU/Modem (option) or RS485 Modem/MCU
(option).
Table of DB9 pins:
Pin No.
Name
1
DCD
2
TXD
3
Boot
4
NC
5
NC
6
RXD
7
DSR
8
DTR
9
GND
10
NC
11
CTS
12
RTS
13
RI
14
Reset
15
NC*
* - Analog Input 0, 0-10V as an option
10
Dir
OUT
Data Carrier Detect. Raised by DCE when modem
IN
Transmit Data (a.k.a TxD, Tx). Sending data from DTE.
-
-
OUT
Receive Data (a.k.a RxD, Rx). Arriving data from DCE.
OUT
Data Set Ready. Raised by DCE to indicate ready (optionally
IN
Data Terminal Ready. Raised by DTE when powered on. In
auto-answer mode raised only when RI arrives from DCE.
-
-
OUT
Clear To Send. Raised by DCE in response to RTS from DTE.
IN
Request To Send. Raised by DTE when it wishes to send.
OUT
Ring Indicator. Set when incoming ring detected - used for auto-
IN
-
Description
synchronized.
Modem boot
-
-
RS485 A)
Ground
-
Expects CTS from DCE.
answer application.
Modem reset
Not connected in standard version*
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Troubleshooting
