Ma, Current Loop Output; Status Output; Table 6-3: Statuso - Teledyne 6400A Instruction Manual

Sulfur dioxide analyzer
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TAI Model 6400A SO

6.6 4-20 mA, Current Loop Output

The current loop option replaces the voltage output of the instrument with an isolated 4-20 mA
current output. The current outputs come out on the same terminals that were used for voltage
outputs, see Figure 2-2. The REC and DAS outputs have current loop capabilities. See
Troubleshooting Section 9.3.4.4 for electrical specifications and refer drawings 01471 and 01248 for
the jumper settings.

6.7 Status Output

The status output is an option that reports Analyzer conditions via contact closures on the rear panel.
The closures are available on a 50 pin connector on the rear panel. The contacts are NPN transistors
which can pass 50 ma of direct current. The pin assignments are listed in Table 6-3 below.
Table 6-3: Status Output Pin Assignments
OUTPUT #
1
2
3
4
5
6
7
8
9
10
11
12
The Status Board schematic can be found in the Appendix Drawing 01087.
Analyzer Operator Manual, 02164, Rev. G
2
PIN #
DEFINITION
1(-),2(+)
ZERO CAL
3(-),4(+)
SPAN CAL
5(-),6(+)
FLOW ALARM
7(-),8(+)
TEMP ALARM
9(-),10(+)
DIAG MODE
11(-),12(+)
POWER OK
21(-),22(+)
SYSTEM OK
19(-),20(+)
HVPS ALARM
13(-),14(+)
SPARE
23(-),24(+)
HIGH RANGE
25(-),26(+)
SHUTTER
27(-),28(+)
UV LAMP ALARM
CONDITION
CLOSED IN ZERO CAL
CLOSED IN SPAN CAL
CLOSED IF FLOW WARNING
CLOSED IF ANY TEMP WARNING
CLOSED IN DIAG MODE
CLOSED IF SYSTEM POWER OK
CLOSED IF SYSTEM OK
CLOSED IF HVPS WARNING
CLOSED IF HIGH PMT RANGE
CLOSED IF SHUTTER WARNING
CLOSED IF UV LAMP WARNING
6-9

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