User`s guide

Bulletin No. VVDED397053US Section 1—Hardware Set-Up
November 2000 Connections
© 2000 Schneider Electric All Rights Reserved
9
Figure 5: Male and Female 9-pin SUB-D Connections
Standard RS-485 Bus
Use the following recommendations to construct a standard RS-485 bus:
• Use the Phoenix Contact cable (reference IBS RCBxxxM, where
xxx = length of cable in meters).
• Maximum length of line: 42,640 ft (13,000 m).
• Maximum length of drop cable: 1,312 ft (400 m).
• Do not connect more than 256 devices to one bus.
• When routing cable, keep the bus away from the power cables (at least
12 in [30.5 cm]), and make any crossovers at right angles.
Table 5: Female 9-pin SUB-D Connector Pin (Output) on the Card
Pin Signal Pin Signal Pin Signal
1DO24
No
Connection
7DI2/
2DI25VCCO8
No
Connection
3 GNDO 6 DO2/ 9 RBST
Male Female
123
54
678
9
321
9
54
876
VVDED397053USBook Page 9 Tuesday, November 28, 2000 9:01 AM