Lightwave Communications LDX-3232 manual Interlock Connections, Back Panel LD Connector

C H A P T E R 2

O P E R A T I O N

Connecting to the Laser

		OUTPUT	LDX-3232 Current Source
		7	+
			Bias
		6	+
			-
		9
		5
P. D.	L. D.	3
			Earth Ground
	Figure 2.4	Common Laser Anode - Photodiode Anode

The 9-pin connector marked CURRENT SOURCE on the back panel is used to connect your laser diode to the LDX-3232. There are connections provided for laser cathode and anode, photodiode cathode and anode, chassis ground and interlock. The pinout diagram for this connector is shown in Figure 2.5.

1, 2	Interlock
3	Chassis Ground	1
4	Cathode Voltage Sense		6
		2
5	Laser Cathode
		3	7
6	PD Cathode (+)
		4	8
7	PD Anode (-)		9
8	Anode Voltage Sense	5
9	Laser Anode

Figure 2.5 Back Panel LD Connector

Interlock Connections

In order for the laser output to be enabled a short circuit must exist between the Interlock Pins (Pins 1 and 2) of the connector. The short can be a direct short across the pins or a switch to prevent laser operation until the switch is closed. If a short does not exist between these two pins, the INTERLOCK LED will illuminate on the front panel and the laser output will be disabled.

Note: The BNC Interlock Connection from the BNC connector on the rear panel will also make the INTERLOCK LED illuminate. Please see the notes in chapter five on use of the BNC interlock connection to learn more about its operation.

The interlock terminals on the LASER connector, pins 1 and 2, must be kept isolated from all other connections including earth ground.

12 LDX-3232