KMC Controls KMD-5210, Инструкция по установке и эксплуатации

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KMD–5210 Installation and Operation
Revision E
Installation
EIA–485 networks
17
Refer to Illustration 2-4 for an example of typical EIA–485 connections.
End-of-line termination
Each EIA–485 network segment requires end-of-line termination for proper
operation of the network. Proper termination prevents signal degradation and
EMI type interference with other system wiring. Termination jumpers are
located on both sides of each EIA–485 connector (one each for the A and B
terminals; see Illustration 2-5.)
To activate the end-of-line termination, leave the jumpers in place. If
termination is not required, position the jumpers so they only cover one pin
on the header.
Illustration 2-4 Typical EIA–484 Wiring Configuration
Illustration 2-5 End-of-line Termination Jumpers
G
A
B
G
G
B
A
G
B
A
A
B
KMC controller
connections
Input termination jumpers
(Two at each EIA–485 connector)
Jumpers set for end-of-line
termination removed.