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3.2 RS-232 SERIAL INPUT
The RegCom-Pro accepts serial data via the DB-9 Female connector located on the rear of RegCom-Pro. This connector
is similar to “AT” type computer RS232 serial ports and the pin out is identical. Table 1 shows the standard pin out for
RegCom-Pro RS-232 female connector. On the other hand Table 2 compares the RegCom-Pro RS-232 with standard “AT”
computer’s RS-232 connector.
Table 2: RS-232 DB-9 Pin-Out vs RegCom-Pro DB-9 Pin-Out
Table 1: Pin-Out of the DB-9 Female Connector on the RegCom-Pro
1
Alarm Out 1
From RegCom-Pro
Open Collector Transisitor
2
Receive Data
To RegCom-Pro
Data from Cash Register
3
Transmit Data
From RegCom-Pro
Data to Cash Register
4
DTR
From RegCom-Pro
Remain High or RS-485 Input (+)(A)
5
Ground
-------------------
Signal / Power Gnd or Isolated RS-232 Input Gnd
6
DSR
From RegCom-Pro
Remain High or RS-485 Input (-)(B)
7
RTS
To RegCom-Pro
Alarm Input or Hardware Handshaking
8
CTS
From RegCom-Pro
DVR RS-232 Output or Hardware Handshaking
9
Alarm Out 2
From RegCom-Pro
Open Collector Transistor or Signal / Power Gnd
Pin #
Label
Direction
Function
1
CD (Carrier Detect )
Alarm Out 1
2
RXD ( Recieve Data )
RXD
3
TXD ( Transmit Data )
TXD
4
DTR ( Data Terminal Ready )
Aways True
5
SG ( Signal Control )
GND
6
DSR ( Data Set Ready )
Aways True
7
RTS ( Request to Send )
RTS ( Option)
8
CTS ( Clear to Send )
CTS ( Option)
9
RI ( Ring Indicator )
Alarm Out 2
PIN #
SIGNAL NAME ( RS232 )
RegCom-Pro
3. CONNECTIONS
RegCom-Pro POS / Cash Register Interface