INSTALLATION MANUAL User Manual

Chapter 4

Installing the DL50

4–14

The RS-485 interface has these advantages over the RS-232

• Improved noise immunity.

• DL50 displays can be a distance of up to 4000 feet (1200 m) from the

host device.

• Up to 32 devices can be connected directly to the RS-485 port of the host

controller. Up to 100 DL50 displays can be addressed when line drivers

are used.

Figure 4.11 shows the location of the DL50’s RS-485 port terminals. The

terminals are labeled:

RS-485 Connection Terminals

Label Function Definition

1 E. GND Earth Ground

2 SHLD Shield

3 COM Common

4 + RS-485 + (B)

5 - RS-485 - (A)

6 TERM Termination

Figure 4.11

RS-485 Terminal Location

RESET

SHLD (Terminal #2)

COM (Terminal #3)

+ (Terminal #4)

- (Terminal #5)

TERM (Terminal #6)

E. GND (Terminal #1)

RS-485 Connections