Honeywell SPM Flex User Manual

24
SPM Flex Gas Detector
Relays
The detector is equipped with three relays� Connect it as shown in this figure�
Figure 16. Relay conguration
The relays can be wired as normally closed or normally open� It can also be
configured as normally energized or normally de-energized via software�
By default, the relays are set to Alarm 1, Alarm 2, and Instrument Fault�
Modbus
The detector includes a Modbus/TCP server� Multi-word data is presented in
big-endian format, as required by the Modbus standard� For example, 150�0 ppm
is stored as 0x4316 in the low register of the pair and 0x0000 in the high register
of the pair� As another example, the NH
3
gas abbreviation would be stored in
registers 40007 to 40011 as shown in this table:
Modbus Holding
Register Number
Description Value if NH
3
selected
40007 Gas Abbr 1of5 0x4E48
40008 Gas Abbr 2of5 0x3300
40009 Gas Abbr 3of5 0x0000
40010 Gas Abbr 4of5 0x0000
40011 Gas Abbr 5of5 0x0000
More information about Modbus can be found at www.modbus.org�
24 VDC
-
+
4-20 mA
-
+
Terminals
Relay 1
Terminals
Relay 2
Terminals
Fault
Relay 1
COM
NC
NO
Relay 2
COM
NC
NO
Fault
COM
NC
NO

Honeywell SPM Flex Specifications

General

Brand	Honeywell
Model	SPM Flex
Category	Security Sensors
Language	English