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Hitachi EH-150 Series - Page 28

Hitachi EH-150 Series
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Chapter 4 Installation
4 - 8
The example of cable connection
The example of cable connection of RS-422 I/F and RS-485 I/F is shown below.
Additional terminal block is useful for multi-drop communication.
(1) When connecting in RS-422 I/F
Please attach terminator if needed.
Please attach terminator if needed.
« Note »
Please make a shield part one end grounding in principle. However, both-ends grounding or no
grounding may be effective by the noise. Please choose the suitable grounding method according to
environment.
EH-SIO Port
Port 2
[6] SG
[5] TERM
[4] RD
[3] RD+
[2] SD
[1] SD+
External device 1
SG
SD
RD+
RD
SD+
SG
SD
RD+
RD
SD+
Terminator
100
(1/2W)
External device n
The inside of [ ]
is Pin No.
EH-SIO Port
External device 1
SG
SD
RD+
RD
SD+
External device n
SG
SD
RD+
RD
SD+
[1] SG
[6] RD
[7] RD+
[5] SD
[4] SD+
Terminal block
SG
RD
SD+
SD
RD+
Terminator
The inside of [ ]
is Pin No.
Terminator
100
(1/2W)
Port 1

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