Teledyne 9110AH - Nitrogen oxides analyzer - Manual (Page 67)

TELEDYNE Model 9110AH NO
X
Analyzer Operator Manual, 01620, Rev. F
5-25
5.6 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 5-8
below.
Table 5-8: Status Output Pin Assignments
Output # Pin # Definition Condition
1 1,2 ZERO CAL CLOSED IN ZERO CAL
2 3,4 SPAN CAL CLOSED IN HIGH SPAN CALIBRATION
3 5,6 FLOW ALARM CLOSED IF FLOW WARNING
4 7,8 TEMP ALARM CLOSED IF ANY TEMP WARNING
5 9,10 DIAG MODE CLOSED IN DIAG MODE
6 11,12 POWER OK CLOSED IF SYSTEM POWER OK
7 13,14 CONC ALARM CLOSED IF CONCENTRATION WARNING
8 27,28 LOW SPAN CAL CLOSED IN LOW SPAN CALIBRATION
9 SPARE
10 19,20 AUTORANGE - HI CLOSED IF IN HIGH RANGE
11 21,22 SYSTEM OK CLOSED IF NO FAULTS PRESENT
12 23,24 RX CELL PRESS CLOSED IF ABS PRES > 15" HG
The Status Board schematic can be found in the Appendix Drawing 01087.
5.7 RS-232 Interface
The RS-232 communications protocol allows the instrument to be connected to a wide variety
of computer based equipment. The interface provides two basic functions in the M9110AH.
1. First is a comprehensive command interface for operating and diagnosing the analyzer. The
command set can be used interactively or operated via stored program. This interface has,
in fact, more capabilities than the front panel keyboard.
2. The interface can provide an audit trail of analyzer events. In this function the port sends
out messages about instrument events like calibration or warning messages. If these
messages are captured on a printer or remote computer, they provide a continuous audit
trail of the analyzers operation and status.