Gasboy FuelOmat Payment Terminal - Manual (Page 24)

OrPT Manual 14
c. J20: RS-232 connector
Connector Type: D-Type 9 pins female
Function: for monitoring and diagnostic use
Table 2-4. J20 – RS-232 Connector (Half-Duplex, Rx, Tx)
Pin No. Functionality
1 CD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
2-5.2. Voltage Protection
The OrPT housing requires a grounding attachment. The OrPT is connected to the OrPT box
chassis for protection against high voltage transient and lightning.
Furthermore, two types of protections are included in the OrPT module:
• Isolation of 1.5 KVDC to protect against galvanic connection between the host side and the
OrPT side
• In RS-485 communication, the OrPT side is protected against high voltage transient and
lightning by using Spark Gaps and transorbs. This allows the use of long communication
cables.
2 2 - - 6 6 . . I I N N D D I I C C A A T T O O R R S S
• The OrPT module includes two LED indicators, green and red, located on its front panel,
and a buzzer. The OrPT indicators provide visual and audio display.