Grounding; Wiring An External Noise Filter - Omron G3PW - MANUAL 2 User Manual

Wiring
3-3-4

Grounding

3-3-5

Wiring an External Noise Filter

Power supply
100 to 240 VAC
(50/60 Hz)
■
Communications Terminals
EJ1 Modular Tempera-
ture Controller, CJ-ser-
ies Serial Communica-
tions Unit, etc.
• The terminating resistance is 54 Ω min. combined.
• Both ends of the transmission path (including the host computer if it is at
one end), must be specified as end nodes (terminating resistance). Use a
combined terminating resistance of at least 54 Ω .
• The EJ1 has an internal terminating resistance of 120 Ω . Install terminat-
ing resistance (110 to 125 Ω , 1/2 W) at only the end G3PW Power Con-
troller.
Always ground the Power Controller to 100 Ω or less. There are no ground ter-
minals provided, so use the heat sink mounting screws as ground terminals.
Always insert a noise filter in the power supply lines to the G3PW.
Noise Filter
RSMN-2030/2060
(TDK-Lambda Corporation)
1
3
4
2
+ Multi-drop
−
Max. of 31 nodes
1. RS-485(+)
2. RS-485(−)
3
4
5
6
7
8
9
10
11
12
13
14
For standard models, 1 and 2 are not used.
1 2
T1
Time-delay fuse
Load
Load circuit (T1)
Load circuit (L1)
Fast-acting fuse
Section 3-3
N L
Command
4 5
3
input/power
supply
terminal block
L1
Load
terminal block
31