Micromod MOD: 30ML Installation - Manual (Page 94)

MOD 30ML Multiloop Controller
COMMUNICATIONS CONNECTIONS
4-Wire/2-Wire Network
When several slaves on a network require only read and write capability, a mixture of 2-wire
and 4-wire communication can be used to save slot space and transmission cable as shown
in Figure 5-10. This arrangement allows a series of 2-wire slave controllers to be connected
to a 4-wire master controller. The master provides the required bus stabilizing resistors via a
2034N module. The slaves are adequate for the read/write function using either the built-in
circuit or a 2-wire 2032N single wide module.
Figure 5-7. Simplified Diagram, 2034N RS-485, 4-Wire Module
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