Rs485 Connections - GE Multilin MM200 Quick Start Manual

OVERVIEW
10
Figure 14: LO and HI inputs
-
CONTROL
POWER
+
24 VDC
RESET
FIELD START
FIELD STOP
M
LO
The full-voltage non-reversing starter type is a full voltage or across-the-line non-reversing
starter.
When a start control is received, the pre-contactor relay (if any) is picked up for the set pre-
contactor time. When the pre-contactor timer times out, relay contact output 1 closes and
seals-in, picking up contactor M, which starts the motor. When a stop control is received,
relay contact output 1 drops out, contactor M drops out, and the motor stops. The pre-
contactor is omitted on forced starts (for example, External Start).

1.1.2.2 RS485 connections

Figure 15: Typical RS485 connection
OPTOCOUPLER
DATA
COM
SCADA, PLC, OR
PERSONAL COMPUTER
GROUND THE SHIELD AT THE
SCADA/PLC/COMPUTER ONLY
OR THE MM200 ONLY
(*) TERMINATING IMPEDANCE AT EACH END
(typically 120 ohms and 1 nF)
One two-wire RS485 port is provided. Up to 32 MM200 IEDs can be daisy-chained together
on a communication channel without exceeding the driver capability. For larger systems,
additional serial channels must be added. Commercially available repeaters can also be
A10
-
CONTROL
A9
POWER
+ VAC
A8
A7
A6
A5
A4
A3
A2
A1
NOTE: AC power and AC input wiring shown.
Connect NR to Neutral if DC power supply used.
TWISTED PAIR
SHIELD
Z T (*)
UP TO 32 MM200
OR OTHER IEDs,
MAXIMUM CABLE
LENGTH OF
1200 m (4000 ft.)
MM200 MOTOR MANAGEMENT SYSTEM – QUICKSTART GUIDE
QUICKSTART GUIDE
N
L
RESET
FIELD START
FIELD STOP
M
HI
MM200 IED
+
RS485 +
OPTOCOUPLER
-
RS485 -
C
COMMON
IED
RS485 +
RS485 -
COMMON
IED
Z T (*)
RS485 +
RS485 -
COMMON
888745A1.CDR
A10
A9
N
L
A8
NR RETURN
A6
A5
A4
A3
A2
A1
888742A1.cdr
DATA
LAST
DEVICE