Connecting Analog Outputs; Current Loop Analog Outputs (Option 41) Setup; Figure 2-4. Analog Output Connector; Table 2-3. Analog Output Pin-Outs - Teledyne T400 User Manual

2.3.1.2 CONNECTING ANALOG OUTPUTS

The rear panel Analog Output channels A1 through A4 can be mapped to reflect various
operating values in the analyzer, including concentration values, temperatures, pressures,
etc. These mappings are not configured by default and must be set by the user.
An optional Current Loop output (Section 2.3.1.3) is available for A1, A2 and A3 only.
To access these signals attach a strip chart recorder and/or data-logger to the appropriate
analog output connections on the rear panel of the analyzer.
ConFigure through the Setup>Analog Outputs menu (Section 2.5.8).

Table 2-3. Analog Output Pin-Outs

ANALOG
PIN
OUTPUT
1
2
3
4
5
6
7
8

2.3.1.3 CURRENT LOOP ANALOG OUTPUTS (OPTION 41) SETUP

If your analyzer had this option installed at the factory, there are no further connections to
be made. Otherwise, it can be installed as a retrofit for each of the analog outputs. This
option converts the DC voltage analog output to a current signal with 0-20 mA output
current, which can be scaled to any set of limits within that 0-20 mA range. However,
most current loop applications call for either 2-20 mA or 4-20 mA range. All current loop
outputs have a +5% over-range. Ranges with the lower limit set to more than 1 mA (e.g.,
2-20 or 4-20 mA) also have a -5% under-range.
Figure 2-5 provides installation instructions and illustrates a sample configuration of one
current output and two voltage outputs. Following Figure 2-5 are instructions for
converting current loop analog outputs to standard 0-to-5 VDC outputs. To calibrate or
adjust these outputs use the Setup>Analog Outputs menu (Section Error! Reference
source not found.).
26
ANALOG OUT
A1 A2
+ - + -

Figure 2-4. Analog Output Connector

SIGNAL OUT
User-selected
A1
through the
Setup>Analog
Outputs menu.
A2
A3
A4
Teledyne API – Model T400 O
A3 A4
+ - + -
STANDARD
VOLTAGE OUTPUT LOOP OPTION
V Out
Ground
V Out
Ground
V Out
Ground
V Out
Ground
Analyzer
3
CURRENT
I Out +
I Out -
I Out +
I Out -
I Out +
I Out -
I Out +
I Out -
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