Teledyne M300EM operation manual Bit or Channel, Number, Signal Name, Description, A-28

APPENDIX A-4: Signal I/O DefinitionsTeledyne API - T300/T300M and M300E/EM PN 04906H (DCN5840)

Signal Name				Bit or Channel			Description
					Number
		Front panel I2C keyboard, default I2C address 4E hex
MAINT_MODE		5		(input)		0	= maintenance mode
						1	= normal mode
LANG2_SELECT		6		(input)		0	= select second language
						1	= select first language (English)
SAMPLE_LED		8		(output)		0	= sample LED on
						1	= off
CAL_LED		9		(output)		0	= cal. LED on
						1	= off
FAULT_LED			10 (output)			0	= fault LED on
						1	= off
AUDIBLE_BEEPER		14 (output)				0	= beeper on (for diagnostic testing only)
						1	= off
	Relay	board digital output (PCF8574), default I2C address 44 hex
RELAY_WATCHDOG		0				Alternate between 0 and 1 at least every 5 seconds to keep
						relay board active
WHEEL_HTR		1				0	= wheel heater on
						1	= off
BENCH_HTR		2				0	= optical bench heater on
						1	= off
O2_CELL_HEATER 5		3				0	= O2 sensor cell heater on
						1	= off
BOX2_HEATER 3,		3				0	= internal box temperature #2/oven heater on
OVEN_HEATER 15						1	= off
CAL_VALVE		4				0	= let cal. gas in
						1	= let sample gas in
SPAN_VALVE		5				0	= let span gas in
						1	= let zero gas in
ZERO_SCRUB_VALVE 2,3		6				0	= open zero scrubber valve
						1	= close
SHUTOFF_VALVE		6				0	= energize shutoff valve
		7 3,15				1	= de-energize
IR_SOURCE_ON		7				0	= IR source on
			n/a		3,15	1	= off

A-28 04188D DCN5752