Epson MR Series Technical Reference Manual page 24

Rear Cover
Rear view(Standard model)
Mouse
Keyboard
Rear view(24V model)
DC 24V output
(for TM printer)
Mouse
Keyboard
1-4 Features and Overview
Rear cover
COM2 port
Display
COM1 port
port
LPT port
Ethernet
port
COM2 port
Display
COM1 port
port
LPT port Ethernet
port
PCI slot COM3 port
Line-out Mic input
Line-in
output
input
USB port
PCI slot COM3 port
Line-out Line-in Mic input
output input
USB port
DC 12V output AC voltage
(for DM-M820) select switch
AC Inlet
COM4 port
DC 12V output
AC Inlet
COM4 port
Rev. I