Teledyne 300 Electrical and pneumatic connections, Electrical connections, Status Outputs

1.6 Electrical and pneumatic connections

1.6.1 Electrical connections

Output #1 Carbon Monoxide concentration - Chart Recorder (REC)

Output #2 Carbon Monoxide concentration - Data Acquisition System (DAS) Output #3 Test function analog output

Input #4 Zero valve request

Input #5 Span valve request

Input #6 Not Used

There are 2 six-pin connector strips on the rear panel shown in Figure 1.2. The pins are divided into 3-plus/minus pairs and have the functions shown above.

Outputs 1 and 2 have identical signals and electrical characteristics. Output 3 is the same as 1 and 2 electrically, but has analog TEST function signals routed to it. See Diagnostics in Section 5 for details.

1.6.2Remote contact closures zero/span inputs and status outputs

Remote contact closures can be used to remotely energize the zero/span valves to do a zero or span check. The external contact closure should be capable of switching 12 VDC at 50 ma.

Refer to Figure 1.2 for connection location. See Sections 1.8.6 and 3.6 for further details.

NOTE

ZERO OR SPAN CHECKS CAN BE PERFORMED IN ANY

ORDER.

1.6.3 Status Outputs

Status outputs report analyzer conditions via contact closures located on the DB-50 connector on the rear panel. The contacts are NPN transistors which can pass 50 mA of DC current. The pin assignments are listed in Table 1.1 below:

P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 10