IP250-BV Blue Laser Diode Controller
Chapter 2: Setup and Operation
Page 8
10713-D02
In addition to the alarm shutdown, the IP25-BV will also shutdown (or not allow
ENABLE) if any of the following conditions exist or occur:
The Key lock Inputs (J4-3 and J4-4) are shorted together.
The Remote Interlock Inputs (J4-5 and J4-6) are open circuit.
The -12 V power supply is below approximately -10.8 V (-3.6 V typical).
As mentioned above, the I LIMIT indicator will turn ON when the laser injection
current exceeds 95% of the ILIM setting. This could be due to a number of
conditions summarized here:
The current or power has been adjusted to a point that requires an
injection current of greater than 95% of the current limit setting.
The photodiode is reverse connected (in PMODE operation).
Identified by a negative level at the IPD Test point.
The photodiode is not connected (in PMODE operation).
Identified by 0 V at the IPD Test point.
The photodiode is short-circuited (in PMODE operation).
Identified by 0 V at the IPD Test point.
The ILIM pot is set full CCW (minimal).
2.4. Remote
Monitoring
J5 has been reserved as an I/O port for specialized applications incorporating the
IP250-BV. Refer to the attached engineering support drawing and contact a
Thorlabs engineer for more specific information on using these connections.
2.5. Accessories
The IP250-BV is shipped with the wire harness mates for J1 and J2. You may
purchase spare or replacement harnesses from Thorlabs as well as a suitable wire
harness for J4. The part numbers are listed below:
Wire Harness Descriptions
Jumper
Description
Connector Description
J1
DC Input Wires
Molex 70543-0002
J2
LD Wire Harness
Molex 70543-0003
J3
Modulation Input
BNC
J4
Status Wire Harness
Molex 70543-0005
J5
Test Points
Standard 0.1” Spaced Header
