User manual

Chapter 4 Configuration
MAN_905G_1.16 Page 128
4.14 Connecting 105S Serial I/O
NOTE – Serial I/O Expansion is only possible for 105G Firmware versions 1.50 onwards.
105S modules can be connected to the RS485 port of all 905G units except for the 905U-G-
MD1 unit. 105S modules can be connected to the MD1 if the 905G is configured as
“Repeater-only” -
refer section 4.4.8.
Up to 31 x 105S
addresses can be
connected to each
905G. The 105S-1
and 105S-2
modules use one
address per module,
and the 105S-3 and
105S-4 modules
take up two
addresses.
To enable the 905G
serial port for 105S
expansion, select
the “Enable Serial
Expansion” box in
the configuration
software.
Note that enabling 105S expansion also disables on-line diagnostics via the serial port.
Mapping to or from the 105S I/O is the same as if the 105S modules are connected to a 905U
I/O module. Each 105S module has an address between 96 and 127. The 905G acts as a
repeater address in the mapping. The 905G I/O registers can also be mapped to/from the
105S I/O.
Select to use
105S modules