1 Communications Methods
1 - 4
E5@D Digital Temperature Controllers Communications Manual (H225)
z
RS-485
•
The RS-485 connection can be either one-to-one or one-to-N. Up to 32 units including the host
can be connected in a one-to-N system.
•
The total cable length is 500 m max.
•
Use shielded twisted-pair cable.
For detailed wiring specifications, refer to
Precautions for Safe Use
on page 7.
E5CD/ED
1-1-5
Wiring
RS-485
14
13
RS-485
6.8 V
TX
RX
14
13
FG
−
+
SG
A (
−
)
B (+)
A (
−
)
B (+)
120
Ω
(1/2 W)
Abbreviation
Pin
Abbreviation
Specify both ends of the transmission path including the host
as the end node (that is, connect terminating resistance to both
ends). Use a terminating resistance of at least 54
Ω
.
Host
E5CD/ED
E5CD/ED
End node
RS-485
Shield
Shield
Terminating
resistance
Use 120
Ω
(1/2 W)
terminating resistance.
A < B: "1" Mark
A > B: "0" Space
Communications
transceiver
Pin
Abbreviation
Summary of Contents for E5 D Series
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