GPT-10000 Series User Manual 
20 
 
The SIGNAL I/O port is used to 
monitor the tester status (PASS, 
FAIL, TEST) and input (START/ 
STOP signals). It is also used with 
the Interlock key. 
The USB B-Type port is used for 
remote control. 
The RS-232 port is used for remote 
control. 
Exhaust fan. Allow enough room 
for the fan to vent. Do not block the 
fan openings. 
Connect the GND (ground) 
terminal to the earth ground. 
AC Mains Input for Power Cord 
Socket: 100 – 240 VAC ±10%. 
The fuse holder contains the AC 
mains fuse. For fuse replacement 
details, see page 45. 
Optional LAN port for remote 
control. 
Optional GPIB interface for remote 
control.