B&K Precision 8500-8526 - Manual - Manual (Page 46)

Remote operation
Communication cables
The DC Load has a DB9 connector on the rear panel that allows remote communication.
WARNING
Do not connect the DC Load's DB9 connector to a standard RS-232
instrument. Doing so may damage the instrument, as the instrument
requires TTL logic signals, not standard RS-232 voltages.
Two adapters are available to perform the correct level shifting.
RS232 to TTL serial converter cable IT-E131
Connect the INSTRUMENT side of the adapter to the DC load DB9 connector. Connect the
COMPUTER end to an RS-232 port on your computer.
PC Load
IT-E131 communication
cable
C
O
M
P
U
T
E
R
IN
S
T R U
M
E N T
R X
T X
I T - E 1 3 1 I S O L A T E D
C O M M U N I C A T I O N C A B L E
T T L ( 5 V ) R S 2 3 2 I S O L A T I O N
8 5 9 6 6 6 6 6 8 8 8 9 9 4 2 3 1 1
I T
The LEDs in the adapter will blink when information is sent through the adapter. This is a good way
to tell if your communication link is active.
USB to TTL serial converter cable IT-E132
The IT-E132 adapter allows you to talk to the DC load via your Windows ® computer's USB interface.
To use this interface, you must install the software driver that came with the IT-E132 adapter.
To install the driver, run the PL-2303 Driver Installer.exe file that comes on the CD. This will install
the driver . After installation, right click on My Computer and select Manage. Click on Device
Manager in the left-hand pane, then click on Ports in the right hand pane. You should see an entry
named Prolific USB-to-Serial Comm Port.
Once the driver software is installed on your system, it will appear as if you have a new COM port.
8500 DC Load Series Version: 030614 Page 46 of 77