Ps/2 Keyboard And Mouse Connector (Kbms1); External Keyboard & Mouse (Kbms2) - Advantech PCE-5120 User Manual

Different devices implement the RS-232 standard in different ways. If
you are having problems with a serial device, be sure to check the pin
assignments for the connector.

2.7 PS/2 Keyboard and Mouse Connector (KBMS1)

JFP1
JFP2
JFP3
One 6-pin mini-DIN connectors (KBMS1) on the card mounting bracket
provide connection to a PS/2 keyboard or a PS/2 mouse, respectively.
KBMS1 can also be connected to an adapter cable (P/N: 1700060202) for
connecting to both a PS/2 keyboard and a PS/2 mouse.
2.8 External Keyboard & Mouse (KBMS2)
JFP1
JFP2
JFP3
In addition to the PS/2 mouse/keyboard connector on the PCE-5120's rear
plate, there is also an extra onboard external keyboard and mouse connector.
This gives system integrators greater flexibility in designing their systems.
PCE-5120 User Manual 22
LPT1
KBMS1
LPT1
KBMS2