Table of Contents
Advertisement
ELECTRICAL INSTALLATION
3 Series IED
OPTOCOUPLER
DATA
SCADA, PLC, OR
PERSONAL COMPUTER
GROUND THE SHIELD AT THE
SCADA/PLC/COMPUTER ONLY
(*) TERMINATING IMPEDANCE AT EACH END
(typically 120 ohms and 1 nF)
NOTE:
NOTE
2–24
Figure 2-27: RMIO terminal identification with 4 IO_G modules
PSU
L
G
Figure 2-28: RMIO wiring diagram
SHIELD
Z (*)
T
F7: RMIO+
F8: RMIO-
F5: COM
OR THE MM300 ONLY
F5, F7, and F8 refer to terminals shown on the above 339 Terminal Identification diagrams.
Figure 2-29: RTD wiring
RCU
IO_G
14
13
12
11
10
Tx
9
8
Rx
7
6
5
+
B1
4
-
B2
3
B3
Common
2
1
TWISTED PAIR
B1
RMIO +
B2
RMIO -
B3
COMMON
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: INSTALLATION
IO_G
IO_G
14
14
13
13
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
To switchgear
ground bus
RMIO
Control power
OPTOCOUPLER
DATA
IO_G
14
13
12
11
10
9
8
7
6
5
4
3
2
1
896750.cdr
–
+
N
L
896740A1.CDR
Advertisement
Table of Contents
