Tec Connector; Usb Connector; Tec Grounding Considerations; Figure 2.3 Back Panel Tec Connector - ILX Lightwave LDT-5500B Series User Manual

2
C H A P T E R
The 10 A and 100 A designations are for the thermistor current source level.
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

In the lower right hand corner, 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 2.3. ILX TEC
interconnect cables connect directly to the 15-pin D-connector.

USB Connector

The USB Type B connector is located just to the left of center of the back panel.
Attach the USB cable to the instrument in the proper orientation. A USB cable is
provided in the shipping kit. See Chapter 3 for driver installation information.

TEC Grounding Considerations

The TEC outputs of the LDT-5500B Series are isolated from chassis ground,
allowing either output terminal to be grounded at the user's option.
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 LDT-5500B Series
O P E R A T I O N
Back Panel Controls and Connections

Figure 2.3 Back Panel TEC Connector

Note: For the TEC connector, if any one terminal pin is grounded, then no other terminal
pin should be grounded; damage to thermal load or the temperature controller may occur.