Remote Control Inputs; Alarms And Troubleshooting - THORLABS IP500 User Manual

IP500 Laser Diode Controller
2.2.4.

Remote Control Inputs

In addition to the automatic shutdown features, the IP500 also has a number of
remote enable and lockout functions accessible on J4 of the unit. The standard
unit provides a shunt jumper installed in J4 Pins 5-6. This is the remote lockout
input and must be shorted in order for the unit to be ENABLED. A summary of the
J4 functions is provided for reference. A mating wire harness is available from
Thorlabs, Inc. should you decide to incorporate these features (refer to
Accessories for more information):
Pin
J4-1
J4-2
Momentarily connecting J4-1 to J4-2 will allow remote enable and disable the unit.
Leave unconnected when not using.
Pin
J4-3
J4-4
A closed connection across J4-3 to J4-4 will prevent the unit from being ENABLED.
Leave unconnected when not using.
Pin
J4-5
J4-6
An open connection across J4-5 to J4-6 will prevent the unit from being ENABLED.
These two points must be connected for unit to operate.
All connections to J4 must be made using isolated or dry contacts (i.e. switches or
relays with no potentials on the contacts).
2.3.

Alarms and Troubleshooting

This unit contains circuitry that will automatically shut down the laser driver if any
of the following conditions are met:

The laser diode anode and cathode connections are reversed.

The laser diode connection is broken or an open circuit exists.

The operating voltage (Vop) of the laser exceeds approximately 3.3 V.
If an alarm shutdown occurs the ALARM indicator will turn ON and the LD ON
indicator will turn OFF, remove power from the unit, correct the problem, and
reapply power to the unit. Pressing the ENABLE switch once will turn the ALARM
indicator OFF. Pressing it again will re-enable the unit.
Rev I, December 1, 2015
Description
Remote Enable Input
Remote Enable Return (common to ground)
Description
Key lock Input
Key Lock Return (common to ground)
Description
Remote Interlock Input
Remote Interlock Return (common to ground)
Chapter 2: Setup and Operation
Page 7