LaserSpeed 8000-3 Instruction Handbook

Interfacing with the LS8000-3

Thermostat Interface

In order to extend the ambient temperature range of LaserSpeed gauges, you can provide water or air cooling/heating. This is often accomplished by connecting the gauge to a recirculating heater/chiller, but can also be accomplished by using the gauge's thermostat output. LaserSpeed gauges monitor their internal temperatures, and can provide an output indicating when cooling/heating is required. This output can be connected to a valve or a PLC in order to control the flow of coolant. The thermostat output is available as an alternate configuration of the Index Pulse, the High Speed Pulse Output (Phase B), and the User Scaleable Pulse Output (Phase B.)

Output

How To Configure

Output Pin

Voltage Level

Index Pulse

Set Index Pulse Output Function to

DB25/DB37 pin 22

5-24V, depending on

Thermostat Output

 

User Input Voltage

 

 

 

Set High Speed Pulse Output

DB25/DB37 pin 7

RS-422 Output

High Speed

Configuration to either:

&

Pulse

System Ready/Thermostat Output or

(2V-5V Differential)

DB25/DB37 pin 9

 

Valid/Thermostat Output

 

 

 

 

User

Set User Scaleable Pulse Output

 

 

Configuration to either:

DB25/DB37 pin 6

5-24V, depending on

Scaleable

System Ready/Thermostat Output or

 

User Input Voltage

Pulse

 

Valid/Thermostat Output

 

 

 

 

 

The Thermostat Output turns on (voltage high) when the internal gauge temperature rises above 40ºC, and turns off when the internal gauge decreases below 35ºC.

The output can be connected to an electrically operated valve as shown.

Part No. 93463 / Drawing No. 0921-01561

Page 73 of 221

Revision A (Sep 2007)

Page 73
Image 73
Laser LS8000-3 manual Thermostat Interface, Output How To Configure Output Pin Voltage Level