B&B Electronics 485T Uživatelský manuál Strana 10

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 44
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 9
Owners Manual
2800 Series Marquee
1.7 Single Drop, Half-Duplex, RS-485 Wiring
If only one marquee will be controlled from the PC or PLC, and the marquee is less than four thousand cable feet
away from the PC/PLC, then single drop, half-duplex, RS-485 communications wiring may be used. RS-485 is
typically less convenient than RS-232 due to the required converter, however RS-485 can be used over much
longer distances. Half duplex communication links allow the marquees to send information back to the controlling
PC/PLC over the same wires used to send data to the marquees, but it is the responsibility of the control system
programmer to avoid RS-485 packet collisions.
Page 6 PB-2149-335B
(3) TXD
(3) RD(2) RXD
+12VDC
GND
(2) TD
(5) GND (7) GND
RS-232
485TBLED
RS-485
RTSOFF
SDON
ECHO CONTROL
12VDC
Supply
2800 DB25 Connector
(21) GND
(18) 485-
(17) 485+
RS-485 Cable May Not Exceed
4000 Feet in Length or 63
Marquee Drops Maximum
ALI Suggests Using an 485TBLED
Converter, Purchased from
B&B electronics
Phone: (815) 433-5100
www.bb-elec.com
2800 DIN RAIL
RS-232 OUT
RS-232 IN
RS-485 -
RS-485 +
SIGNAL GND
120VAC NEUT
120VAC HOT
EARTH GND
LB-2815-006
(3) TXD
(3) RD(2) RXD
+12VDC
GND
(2) TD
(5) GND (7) GND
RS-232
485TBLED
RS-485
RTSOFF
SDON
ECHO CONTROL
12VDC
Supply
RS-485 Cable May Not Exceed
4000 Feet in Length or 63
Marquee Drops Maximum
ALI Suggests Using an 485TBLED
Converter, Purchased from
B&B electronics
Phone: (815) 433-5100
www.bb-elec.com
Zobrazit stránku 9
1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 43 44

Komentáře k této Příručce

Žádné komentáře