Lightwave Communications LDT-5525 manual Back Panel TEC Connector

O P E R A T I O N

Back Panel Controls and Connections

Table 2.1 SENSOR SELECT Switch Positions

C H A P T E R 2

SWITCH POSITION	CODE
100 µA	-01-
10 µA	-02-
LM335	-03-
AD590	-04-

The 10 µA and 100 µA designations are for the current source level; thermistor sensor type is implied. When using a thermistor, the supply current depends on the thermistor operating temperature range and the required temperature resolution. Guidelines for setting this switch are contained in Appendix B.

The AD590 sensor operates as a current source which is proportional to the sensed temperature. The LM335 sensor operates as a voltage source which is proportional to the sensed temperature. Both of these sensors are approximately linear over their operating ranges. When they are used, the constants C1 and C2 are used for a two-point conversion. For more information on setting the constants for use with these sensors, see Appendix C.

TEC Connector

At the right of center, when facing the back panel, you will find the 15-pin D-connector for the TEC MODULE. This connector is used for the input and output connections, as shown by the pin-out diagram of Figure 2.12.

1, 2 TE Module (+) 3, 4 TE Module (-)

5TE Module Shield

6Sensor Shield

7Sensor (+)

8Sensor (-)

9Analog Ground

10Control Signal

11Voltage Limit

12Current Limit

13Temp. Limit

14Booster Present

15Digital Ground

8 7 6 5 4 3 2 1

15 14 13 12 11 10 9

Figure 2.3 Back Panel TEC Connector

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