IC TRIPLE LINE TRANSCEIVER, PDSO24, MS-013AD, SOIC-24, Line Driver or Receiver
High Speed, 5 V, 0.1 µF CMOS RS-232 200kBPS Transceiver with 2 Drivers, 2 Receivers, Shutdown and Enable Pins

Microprocessor Supervisor with Backup Battery Switchover, Adjustable Low Line Voltage Monitor, Adjustable Watchdog Timer, Low Line, Power Fail and Watchdog Status Outputs and 100mA Output Current

5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver
IC TRIPLE LINE TRANSCEIVER, PDIP24, PLASTIC, MO-095AG, DIP-24, Line Driver or Receiver

Nanahoshi Kagaku NJC-2410-ADM, 10 Pole Female Straight Cable Mount Circular Connector, Shell Size 24,Male Contacts

Nanahoshi Kagaku, 16 Pole Cable Mount Connector Socket, 24 Shell Size, Male Contacts