02001026
Rev 1 ECO 7062
Operation Manual:
LDD-100/150/250-XX-YY
Page 12 of 13
Optional RS-232 Protocol
LDD-100/150/250-XX-YY-RS
Refer to Figure 2, LDD-100/150/250 Outline Drawing for location of RS-232 Connector
The RS232 interface for Lumina supplies has the following characteristics:
Baud rate
: 9600
Command format
: ASCII characters terminated by carriage return
Reply formats
: ASCII characters terminated by carriage return
Connection:
9 Pin “D” Female (
Tx
: Pin 2,
Rx:
Pin 3,
GND
: Pin 5)
The interface supports programming the output current and power limit of the supply and
reading back the output current and voltage. The output can be turned on and off with a
command as well.
Command
Reply
Function
P
<cr>
<cr>
Program output current to max rated output current
xx.xx
between 0 and 10.00 = 0 – Iout
max
(Note: P
xx.xx
<cr> will also work)
I<cr>
xx.xx
<cr> Read
output
current
xx.xx
between 0 and 10.00 = 0
Iout
max
V<cr>
xx.xx
<cr> Read
output
voltage
xx. xx
between 0 and 10.00 = 0
to Vout
max
ON<cr> <cr>
Enable
supply
output
OFF<cr>
<cr>
Disable
supply
output
Jhkhkh<cr>
?<cr>
Response
to
unrecognized
command
Numbers sent to the supply should be in fixed point decimal format. The numbers sent
back will have four digits and a decimal point, but the resolution is limited to 12 bits and
the accuracy is limited by the specifications of the supply.
