Omron E5CN-HT User Manual page 61

Wiring Terminals
Remote SP Input
Communications
• The E5AN-HT and E5EN-HT support remote SP inputs. To use remote
SP, connect to terminals 29 and 30.
+
29
4 to 20 mA
30
E5AN/EN-HT
Remote SP inputs are not electrically isolated from the internal circuits. When
using a grounding thermocouple, do not connect any of the remote SP input
terminals to the ground. (If a remote SP input terminal is connected to the
ground, errors will occur in the measured temperature as a result of leakage
current.)
RS-485
• When communications are to be used with the E53-CN@03N2 for the
E5CN-HT, or E53-EN03 for the E5AN/EN-HT, connect communications
cable across terminals 11 and 12 or 21 and 22.
11
B(+)
RS-485
12 A( )
E53-CN@03N2 (for E5CN-HT)
Specify both ends of the transmission path including the host computer as
end nodes (that is, connect terminators to both ends).
The minimum terminal resistance is 54 .
Communications Unit Connection Diagram
E5CN-HT
Host computer
RS-485
+
FG
A < B: [1] Mark
A > B: [0] Space
11
B(+)
12
A( )
Do not use.
13
21
B(+)
22 A( )
E53-EN03 (for E5AN/EN-HT)
Shield
E5CN-HT (No. 1)
RS-485
No.
Abbreviation
12 A ( )
11 B (+)
Terminator (120 , 1/2 W)
Section 2-2
RS-485
E5CN-HT (No. 31)
RS-485
No.
Abbreviation
12
A ( )
11
B (+)
39