Teledyne T300 Operation Manual page 374

APPENDIX A-4: Signal I/O Definitions
Signal Name
MAINT_MODE
LANG2_SELECT
SAMPLE_LED
CAL_LED
FAULT_LED
AUDIBLE_BEEPER
RELAY_WATCHDOG
WHEEL_HTR
BENCH_HTR
5
O2_CELL_HEATER
3
BOX2_HEATER ,
15
OVEN_HEATER
CAL_VALVE
SPAN_VALVE
2,3
ZERO_SCRUB_VALVE
SHUTOFF_VALVE
IR_SOURCE_ON
A-28
Bit or Channel
Number
2
Front panel I C keyboard, default I
5 (input)
6 (input)
8 (output)
9 (output)
10 (output)
14 (output)
Relay board digital output (PCF8574), default I
0
1
2
3
3
4
5
6
6
3,15
7
7
3,15
n/a
Teledyne API - T300/T300M and M300E/EM PN 04906H (DCN5840)
Description
2
C address 4E hex
0 = maintenance mode
1 = normal mode
0 = select second language
1 = select first language (English)
0 = sample LED on
1 = off
0 = cal. LED on
1 = off
0 = fault LED on
1 = off
0 = beeper on (for diagnostic testing only)
1 = off
2
C address 44 hex
Alternate between 0 and 1 at least every 5 seconds to keep
relay board active
0 = wheel heater on
1 = off
0 = optical bench heater on
1 = off
0 = O sensor cell heater on
2
1 = off
0 = internal box temperature #2/oven heater on
1 = off
0 = let cal. gas in
1 = let sample gas in
0 = let span gas in
1 = let zero gas in
0 = open zero scrubber valve
1 = close
0 = energize shutoff valve
1 = de-energize
0 = IR source on
1 = off
06864B DCN6314