66 S611 Soft Starter MN03902011E—May 2012 www.eaton.com
Circuit Descriptions
Circuit Descriptions
Modbus RS-485 Connections
Additional Modbus Registers
The following Modbus data is provided in addition to the previously listed Modbus registers.
Note: The Modbus register address is –1 of the Modbus register number.
Note: All 32 bit values are Low word first LLLLHHHH. Example: Register 7 = Low word of
serial number; Register 8 = High word of serial number.
Modbus Registers
Pin Number Circuit
EIA-485
Name
Recommended
Wire Color Description
1 Common C/C Grey Power supply common
2 D1 B/B Yellow Transceiver terminal 1, V1 voltage, data + (V1 >VO for
binary 1 [OFF] state)
3 N/C — — —
4 D0 A/A Brown Transceiver terminal 0, VO voltage, data –(VO >V1 for
binary 0 [ON] state)
5 24 Vdc — Red Power supply positive
Modbus
Coil Number
Modbus
Register Number R/W Parameter Name Description
— 1 R Field inputs This is a bitfield of inputs. Bit 0 corresponds with input 1, bit 1
corresponds with input 2, and so on
1 — — — Field input 1
2 — — — Field input 2
3 — — — Field input 3
4 — — — Field input 4
C
D1
D0
24
Common
RS485+
RS485–
+24 Vdc
W
I
R
N
G
I
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