Table of Contents
Advertisement
ELECTRICAL INSTALLATION
339 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
339 Motor Protection System
Surge ground
2–12
Figure 15: 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 16: RTD wiring
N/C
~14
~13
Shield
~12
Compensation
~11
Return
~10
~9
Hot
Shield
~8
Compensation
~7
Return
~6
~5
Hot
Shield
~4
Compensation
~3
Return
~2
~1
Hot
TWISTED PAIR
B1
B2
B3
COMMON
Three-wire shielded cable
Motor
starter
RTD
terminals in
motor starter
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: INSTALLATION
To switchgear
ground bus
RMIO
RMIO +
OPTOCOUPLER
RMIO -
DATA
Route cable in separate conduit from
current carrying conductors
RTD terminals
at motor
Maximum total lead resistance:
25 ohms for Platinum RTDs
–
+
N
L
Control power
896740.CDR
Motor
RTD in motor
stator or
bearing
896739.CDR
Advertisement
Table of Contents
