Wiring And Addressing - Emerson Dixell GDS41M Installing And Operating Instructions

6.2 WIRING AND ADDRESSING

ITEMS
Wiring for Modbus
RS485
Modbus Address
Network Connection
1592038710 Gas Leak Detector Modbus GB 01.12.2016
Modbus connector is CN4.

Pin 1 GND

Pin 2 + TX/RX non-inverting signals

Pin 3 - TX/RX inverting signals
The 3-pin connections are designed for a 2-conductor wire with
a common drain shield.
Hexadecimal Address Switches.
Used to set a unique address for the sensor when multiple
sensors are connected to a controller.
Valid addresses are 0-247.
Modbus addressing can be selected by the combined settings
on the hexadecimal dial switches SW1 and SW2.
Addresses 0-15 are selectable with switch SW1 (the least
significant portion of the address). SW2 scales the addresses
by a factor of 16 (the most significant portion of the address).
NOTE: Address 0 is reserved to enable the master to broadcast
to all of the detector slave devices.
Addresses 248-255 (0x8F – 0xFF) are reserved.
Addresses 254 (0xEF) and 255 (0xFF) are reserved for setting
the Modbus communications Baud rates.
GDS41M-GDS66M-GDI41M-GDI66M
DESCRIPTION
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