Honeywell XNX Technical Manual

XNX Universal Transmitter
Appendix B - Modbus Protocol
188
Modbus Holding
Register Address
Datatype Variable Name Description
40011
int8 iMeasurementUnits
The meaning of this datum is as enumerated below:
0
1
2
3
4
5
6
7
8
9
10
11
12 to
255
Default
mg/m3
g/m3
%vol
ppm
%LEL
UEG
Ratio
%LEL*M
ppm*m
EG*m
%vol * meter
for future expansion
40012 to 40014 string[5] strGenericUnits User-dened 5 character string description for installed generic mA sensor
40015 int8 iWinTemp If a Searchline Excel is tted, this is the temperature of the window. Otherwise, this is the temperature of the window.
40016 int8 iTransTemp Temperature of the XNX in Celcius.
40017 int8 iSensorTemp Temperature of the sensor (Optima, Excel, ECC, etc)
40018 to 40026 string[18] strTransmitterID User-congured transmitter name.
40027 to 40035 string[18] sDateTime Format is “mm/dd/yy hh:mm:ss”. Month and day inverted if so congured.
40036
int8 iSensorType
The meaning of this datum is as enumerated below
1
2
3
4
5
7
Others
mV Bridge
Electrochemical Cell with toxic cartridge
Electrochemical Cell with O2 cartridge
Optima
Excel
generic mA input
for future expansion
40037 oat32 f_mA_Out The current produced by the XNX in milliamperes.


Honeywell XNX Specifications

General

Ingress Protection	IP66/67
Product Type	Universal Transmitter
Enclosure Rating	IP66/67
Display	LCD
Communication Protocols	HART, Modbus, Foundation Fieldbus
Power Supply	24 VDC nominal, 18-32 VDC
Operating Temperature	-40°C to +65°C (-40°F to +149°F)
Material	Aluminum or Stainless Steel
Gas Types	Toxic, Oxygen, and Combustible gases
Output	4-20 mA
Relays	3 programmable relays
Approvals	ATEX, IECEx, UL, CSA
Sensor Compatibility	Electrochemical, catalytic, infrared, and other sensor types