Laser beta lasermike LS8000-3 - Manual (Page 73)

LaserSpeed 8000-3 Instruction Handbook
Interfacing with the LS8000-3
Part No. 93463 / Drawing No. 0921-01561 Page 73 of 221 Revision A (Sep 2007)
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
Thermostat Output DB25/DB37 pin 22 5-24V, depending on
User Input Voltage
High Speed
Pulse
Set High Speed Pulse Output
Configuration to either:
System Ready/Thermostat Output or
Valid/Thermostat Output
DB25/DB37 pin 7
&
DB25/DB37 pin 9
RS-422 Output
(2V-5V Differential)
User
Scaleable
Pulse
Set User Scaleable Pulse Output
Configuration to either:
System Ready/Thermostat Output or
Valid/Thermostat Output
DB25/DB37 pin 6 5-24V, depending on
User Input Voltage
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.