B&B Electronics 485T Manuel d'utilisateur télécharger pdf (Page 8)

Owners Manual

2800 Series Marquee

1.5 Single Drop, Full Duplex, RS-232 Wiring

After mounting the marquee, communications wiring will have to be installed. Inspect your unit for serial

communications connections. Some units, such as the black anodized aluminum versions come with a custom

pin-out DB25 connector. Other units such as the industrial steel versions provide RS-232, and RS-485 screw

terminals on a DIN rail barrier inside the enclosure requiring the customer to punch a conduit hole.

If only one marquee will be controlled from the PC or PLC, and the marquee is less than fifty cable feet away from

the PC/PLC, then single drop, full duplex, RS-232 communications wiring may be used. RS-232 is typically more

convenient than RS-485 communications, but RS-232 can only be used over short distances. A full duplex

communications link allows the marquee to send information back to the controlling PC/PLC.

Page 4 PB-2149-335B

2800 FACTORY WIRING

RS-232 OUT

RS-232 IN

RS-485 -

RS-485 +

SIGNAL GND

120VAC NEUT

120VAC HOT

EARTH GND

LB-2815-006

(2) RXD

(3) TXD

(5) GND

Standard PC DB9

Connector Illustrated

Standard PC DB9

Connector Illustrated

(2) RXD

(3) TXD

(5) GND

(15) RS-232 OUT

(14) RS-232 IN

(21) GROUND

2800 DB25 CONNECTOR

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B&B Electronics 485T Manuel d'utilisateur Page 8