Teledyne 6020 Operating Instructions Manual page 19

Photometric Analyzer
Range
Range 1
Range 2
Range 3
Alarm Relays:
There are three alarm-circuit connectors on the alarm relays block
(under RELAY OUTPUTS) 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 ampers at 250 V AC into a resistive load
(Figure 2-6).
Normally closed
Normally open
Moving contact
The connectors are:
Threshold Alarm 1:
Table 2-2: Analog Range ID Output - Example
Voltage (V)
0.25
0.50
0.75
Figure 2-6: Types of Relay Contacts
• Can be configured as high (actuates when
concentration is above threshold), or low
(actuates when concentration is below thresh old).
• Can be configured as fail-safe or non-fail-safe.
• Can be configured as latching or nonlatching.
• Can be configured out (defeated).
Teledyne Analytical Instruments
Part I: Control Unit
Current (mA)
8
12
16
Normally open
Moving contact
Part I: 2-5