Lenze I/O system 1000 System Manual - Manual (Page 227)

Product description
I/O compound modules − communication
RS485 interface − EPM−S650
3
l
227 EDSIO1000 EN 7.0
Wiring
ƒ Logic states as a voltage difference between 2 twisted cores
ƒ Serial bus connection
– Full duplex (RS422 four−wire operation)
– Half duplex (RS485 two−wire operation)
ƒ Cable length: 250 m for 115.2 kbps ... 1200 m for 19.2 kbps
ƒ Data transfer rate: Max. 115.2 kbps
RxD/TxD-P (B) 2
RxD/TxD-N (A) 6
Shield
GND_ISO 7
RTS 3
RxD/TxD-P (B)
RxD/TxD-N (A)
(GND)
EPM-S650
RxD/TxD-P (B)
RxD/TxD-N (A)
(GND)
RxD/TxD-P (B)
RxD/TxD-N (A)
(GND)
... ...
SLIO650a
Fig. 3−79 RS422 wiring
TxD-N (A) 5
TxD-P (B) 1
4
8
RxD-N (A) 6
Shield
GND_ISO 7
RxD-P (B) 2
Shield
RxD-N (A)
(GND)
RxD-P(B)
TxD-N (A)
TxD-P (B)
EPM-S650
120
W
*)
SLIO650a
Fig. 3−80 RS485 wiring
*) A bridge between pin 8 and 4 in the EPM−S650 activates a 120 W terminating resistor between RxD−P (pin 2) and
RxD−N (pin 6).