Teledyne 6750 - Total Organic Carbon analyzers - Manual (Page 37)

Total Organic Carbon Analyzer Installation
Teledyne Analytical Instruments 25
3.3.3 Alarm Connections
The Model 6750 is equipped with two concentration alarms and
one analyzer malfunction alarm. The three alarm-circuit connectors use
spring terminals for making connections to internal alarm relay
connects. Each alarm provides a set of Form C contact with both
normally open and normally closed contact connections. The contact
connections are indicated by diagrams on the rear panel. They are
capable of switching up to 3 amperes at 250 VAC into a resistive load.
See “As Built Drawings” in the Appendix. The connections are:
• Threshold Alarms:
• Can be configured as high (actuates when concentration
is above setpoint), or low (actuates when concentration is
below threshold).
• Can be configured as failsafe or non-failsafe.
• Can be configured as latching or non-latching
• Malfunction Alarm
3.3.4 RS-232 Serial Connection
An RS-232 port is provided for serial communication (MODBUS).
Connect a standard RS-232 cable from the computer to the RS-232 port
on the main board.
3.4 Gas/liquid Connections
Refer to the “As Built Drawings” in the Appendix for details and
Figure 3-5.
The Model 6750 Analyzer provides easy access for liquid, gas, vent
and drain connections.
3.4.1 Liquid Connections
Liquid phase sample connections include the following: (See
Figure 3-5):
• Sample (On-Line)
• D. I./Dilution Water
• Calibration Standard