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Model 200EH/EM (Ref: 05147F) APPENDIX A-4: M200EH/EM Signal I/O Definitions, Revision F.0
A-21
SIGNAL NAME
BIT OR CHANNEL
NUMBER
DESCRIPTION
O2_CELL_HEATER
1
5 0 = O
2
sensor cell heater on
1 = off
ZERO_VALVE 6 0 = let zero gas in
1 = let sample gas in
SPAN_VALVE 6 0 = let span gas in
1 = let zero gas in
CAL_VALVE 7 0 = let cal. gas in
1 = let sample gas in
AUTO_ZERO_VALVE 8 0 = let zero air in
1 = let sample gas in
NOX_VALVE 9 0 = let NO
X
gas into reaction cell
1 = let NO gas into reaction cell
LOW_SPAN_VALVE 10 0 = let low span gas in
1 = let sample gas in
HIGH_SPAN_VALVE 11 0 = let high span gas in
1 = let sample gas in
12–15 Spare
Rear board primary MUX analog inputs, MUX default I/O address 32A hex
PMT_SIGNAL 0 PMT detector
HVPS_VOLTAGE 1 HV power supply output
PMT_TEMP 2 PMT temperature
3 Spare
4 Temperature MUX
5 Spare
O2_SENSOR
1
6 O
2
concentration sensor
SAMPLE_PRESSURE 7 Sample pressure
RCELL_PRESSURE 8 Reaction cell pressure
REF_4096_MV 9 4.096V reference from MAX6241
OZONE_FLOW 10 Ozone flow rate
TEST_INPUT_11 11 Diagnostic test input
CONV_TEMP 12 Converter temperature
TEST_INPUT_13 13 Diagnostic test input
14 DAC loopback MUX
REF_GND 15 Ground reference
Rear board temperature MUX analog inputs, MUX default I/O address 326 hex
BOX_TEMP 0 Internal box temperature
RCELL_TEMP 1 Reaction cell temperature
IZS_TEMP 2 IZS temperature
3 Spare
O2_CELL_TEMP
1
4 O
2
sensor cell temperature
TEMP_INPUT_5 5 Diagnostic temperature input
TEMP_INPUT_6 6 Diagnostic temperature input
MANIFOLD_TEMP 7 Bypass or dilution manifold temperature
04521C (DCN5731)