Spectrum Controls 1756sc-OF8H Series A - Manual (Page 83)

Chapter 7: HART Channel Configuration, Data, and Status 69
Figure 7.2 (Channel 0 Configuration Example)
How the How the How the How the How the
Modules Send Modules Send Modules Send Modules Send Modules Send
and Receive and Receive and Receive and Receive and Receive
HART Data HART Data HART Data HART Data HART Data How the Module Connects to a Field Device How the Module Connects to a Field Device How the Module Connects to a Field Device How the Module Connects to a Field Device How the Module Connects to a Field Device
Both the HART input and Output module behave as a HART master in
which case the field device is considered the slave. In other words, the
master must initiate the communication with the field device and the
device simply replies with an appropriate response. Any given channel
may have a master, a secondary master (hand held configuration tool), and
a slave connected simultaneously. Please see Figure 3.