ABB REF 542 - LON inputs and outputs via a LON bus

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Technical Reference Manual, General
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The REF 54_ feeder terminal offers up to 32 freely programmable LON inputs and
outputs on the LON bus. The inputs and outputs use the L
ONMARK
TM
Standard
network variable (NV type 83 = SNVT_state) for sending and receiving process
data. The LON inputs and outputs are accessible in the feeder terminal configuration
and can be freely used for different types of data transfer between REF 54_ feeder
terminals and other devices that are able to communicate using the network variable
of type SNVT_state.
REX 52x
REX 52x
REF 543 relays
RER 103
REX 52x
RER 103
RER 123
RER 123
SMS
IEC 103 Master
REF:
RER 123 connected to X3.2
RER 103 connected to X3.3
RER 123
RER 103
RER 125
SPA-ZC 22
SPA-ZC 22
Fiber optic modem
RS232C
SMS-SPA_IEC