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RS-232 is the standard serial interface, and it has provisions for controlling the light intensity and power to
the LED lamp. The RS-232 interface is equipped with a DB-9 connection, and is wired as shown in Figure
5. It must be connected to a dedicated COM port. The USB option has a standard Mini USB receptacle
(male), and creates its own COM port upon initialization, providing simple connection and multiple
source control capabilities not limited by hardware.
5
4
3
2
9
8
7
6
Figure 4: DB-9 Serial Interface as seen from Rear of Lightsource Chassis
To operate the unit in RS-232 mode, configure a serial interface cable as shown. Remember that TxD
and RxD signals are reversed between devices. Plug the cable into any standard serial COM port. If
your unit has been configured with the optional USB interface, connect the lightsource and computer
with the enclosed USB cable. The device will automatically be configured and assigned a unique COM port.
You do not need any additional drivers or installation procedures. To determine the COM port number that
has been assigned to the lightsource, open 'Device Manager' and expand the 'Ports' folder and you will
see the lightsource with its associated COM Port number, shown as (COMX) where "X" is the port
number. The lightsource will now communicate exactly as in the RS-232 mode using this COM port.
If your unit has been configured with the optional Ethernet interface module, insert a standard RJ45
connector into the Ethernet port and connect the other end to a network switch or hub. When using the
Ethernet option, a maximum of 255 units may be operated on a single network. To operate the unit in
remote mode (either RS-232, USB, or Ethernet) the rear panel remote switch must be in the "1" position.
Software Protocols
The interface controls the light intensity and power to the LED lamp using simple ASCII character text
strings. These commands are the same for the RS-232, USB, or Ethernet interface. The only difference is
the way in which the ports are opened and assigned prior to issuing commands and queries. Commands
tell the lightsource what to do, and are followed by the "=" character. Queries inquire about the status
and are followed by the "?" character.
Query/Command Response
HEL?
Ver X.X
SSR0?
0 or 1
INT0=XXXX
SSR0=Y
INP=1
The intensity of the lightsource is precisely controlled in 4000 linear steps (0.25% increments) by
assigning the Intensity value (INT0) an integer value from 1 to 4000. The LED may also be turned ON
and OFF by assigning the SSR0 command of either "1" or "0" respectively. The default INT value at
Revision 2 09/01/16
Illumination
Technologies, Inc.
Pin #
1
Lifetime Gauge Common
1
2
Rx Remote Communications
3
Tx Remote Communications
4
N/A
5
Communications GND
Retrieves Firmware Version
LED Enable is OFF (0) or ON (1)
OK
where XXXX = 0 to 4000
OK
Where Y = 0 or 1
Sets the last INT value as the INT value at power up (Default =4000)
OK
Illumination Technologies, Inc.
102 Route 5 West, Building 2, Elbridge, NY 13060 USA
www.illuminationtech.com
COMMUNICATIONS
Description
Pin #
Function
28
Owner's Manual
Description
6
Lifetime Gauge (0-5VDC)
7
N/A
8
N/A
9
N/A
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