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Table 4 - Termination - I/O Options Dedicated to the CRIR E1
PIN NUMBER
PIN FUNCTION DESCRIPTION
8
9
UART_RxD
2
UART_TxD
3
UART_R/T
4
1
1 The specified parameter relies on the subcontractor's specification and is not tested by Honeywell.
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Honeywell CRIR-E1 User Guide
TERMINATION
Power supply minus terminal
GND
Sensor's reference (ground) terminal
Power supply plus terminal
Vin
Operation voltage range
Communication Pins
UART data receive line configured as
digital output
Absolute maximum voltage range
Internal pull up to VDD resistor
Input low level
Input high level
UART data transmission line configured as
digital output
Absolute maximum voltage range
Internal pull up to VDD resistor
Output low level
Output high level
Direction control line for half duplex,
RS485 transceiver like MAX 485
configured as digital output
Absolute maximum voltage range1
Internal pull down to GND resistor
Output low level1
Output high level1
DAC output configured as analog output
used for direct reading by customer's
microcontroller or to provide analog output
Normal concentration range
DAC
Normal voltage range
Relationship between output voltage (V)
and CO
concentration (ppm)
2
Output accuracy
Power Pins
1
1
1
1
1
1
Input/Output Pins
ELECTRONIC SPECIFICATION
-
-
Unprotected against reverse connection
4.5 V to 5.5 V
No internal protection pulled up to VDD at
processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
GND to 0.75 V
No internal protection, pulled up to VDD
at processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
0.4 VDC maximum at 8 mA sink
No internal protection, pulled down at
processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
0.4 VDC maximum at 8 mA sink
2.4 VDC minimum at 8 mA source
No internal protection, pulled down at
processor reset (power up and power
down)
400 ppm to 2000 ppm
0.72 V - 0.05 V to 2 V - 0.1 V
V(output) = 0.4 + 0.0008 x C(CO
±20 mV
)
2
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