Teledyne 3000TA Operating Instructions Manual page 28

3 Installation
Alarm Relays: The three alarm-circuit connectors are spring terminals
for making connections to internal alarm relay contacts. Each provides a set
of Form C contacts for each type of alarm. Each has 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 am-
peres at 250 V ac into a resistive load. See Figure 3-5. The connectors are:
Threshold Alarm 1:
Threshold Alarm 2:
System Alarm:
Further detail can be found in chapter 4, section 4-5.
3-6
• Can be configured as high (actuates when concen-
tration is above threshold), or low (actuates when
concentration is below threshold).
• Can be configured as failsafe or nonfailsafe.
• Can be configured as latching or nonlatching.
• Can be configured out (defeated).
• Can be configured as high (actuates when concen-
tration is above threshold), or low (actuates when
concentration is below threshold).
• Can be configured as failsafe or nonfailsafe.
• Can be configured as latching or nonlatching.
• Can be configured out (defeated).
Actuates when DC power supplied to circuits is
unacceptable in one or more parameters. Permanently
configured as failsafe and latching. Cannot be de-
feated. Actuates if self test fails.
(Reset by pressing
again and any other button EXCEPT Sys-
press
tem to resume.
Figure 3-5: Types of Relay Contacts
Teledyne Analytical Instruments
button to remove power. Then
Model 3000TA