Teledyne 4020 - Hydrocarbon analyzer User Manual
Page 36
Installation Model
4020
Teledyne
Analytical
Instruments
20
Table 3-3: Analog Range ID Output—Example
Range
Voltage Signal
Current Signal
Application
Output (VDC)
Output (mA DC)
Range 1
0.20
6.8
0–1 ppm CH
4
Range 2
0.50
12
0–10 ppm CH
4
Range 3
0.80
16.8
0–100 ppm CH
4
3.3.3.5
A
LARM
R
ELAYS
The nine alarm-circuit connector pins connect to the internal alarm
relay contacts. Each set of three pins provides one set of Form C relay
contacts. Each relay has both normally open and normally closed contact
connections. The contact connections are shown in Table 3-4. They are
capable of switching up to 3 amperes at 250 VAC into a resistive load.
The connectors are:
Threshold Alarm 1:
Can be configured as high (actuates when
concentration is above threshold), or low (actuates
when concentration is below threshold).
Can be Configured as failsafe or non-failsafe
Can be configured out (defeated).
Threshold Alarm 2:
Can be configured as high (actuates when
concentration is above threshold), or low (actuates
when concentration is below threshold).
Configured as failsafe or non-failsafe
Can be configured out (defeated).
System Alarm:
Actuates when DC power supplied to circuits is
unacceptable in one or more parameters. Permanently
configured as failsafe and latching. Cannot be defeated.