Hitachi EH-150 Series - Page 29

Chapter 4 Installation
4 - 9
(2) When connecting in RS-485 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.
External device 1
External device n
Terminal block
Terminator
The inside of [ ]
is Pin No.
Terminator
100
(1/2W)
SG
A(＋)
B(－)
A(＋)
B(－)
SG
[1] SG
[6] RD–
[7] RD+
[5] SD–
[4] SD+
SG
RD–
SD+
SD–
RD+
EH-SIO Port
Port 1
[6] SG
[5] TERM
[4] RD–
[3] RD+
[2] SD–
[1] SD+
SG
A(+)
B(–)
A(+)
B(–)
SG
External device 1
Terminator
100
(1/2W)
External device n
The inside of [ ]
is Pin No.
EH-SIO Port
Port 2