4-16

Chapter 4: Appendix D - RS-485/422 Option

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 7: RS-485/422 SLIM; port/switch block relation

 

 

 

 

 

 

 

 

 

 

 

 

Port

SLIM

Switch

Port

 

SLIM

Switch

 

 

number

socket

block

number

 

socket

block

 

 

1

SM1

S4

9

 

SM3

S4

 

 

2

SM1

S3

10

 

SM3

S3

 

 

3

SM1

S2

11

 

SM3

S2

 

 

4

SM1

S1

12

 

SM3

S1

 

 

5

SM2

S4

13

 

SM4

S4

 

 

6

SM2

S3

14

 

SM4

S3

 

 

7

SM2

S2

15

 

SM4

S2

 

 

8

SM2

S1

16

 

SM4

S1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 8: RS-485/422 SLIM; line load options

Switch

 

Configuration

Configuration

Position

 

(when OFF)

(when ON)

1

 

TxD load is removed

TxD load enabled (150 ohms)

2

 

RTS load is removed

RTS load enabled (150 ohms)

3 & 4

 

RxD disconnected from

RxD connected to bias and

 

 

bias and load circuits

load circuits

 

 

 

 

 

 

Note: These two switches

 

 

 

MUST be used together

 

 

 

 

 

5

 

RxD load is AC (150

RxD load is DC (150 ohms

 

 

ohms in series with 50 nF

and < 50 metres in length)

 

 

and > 50 metres in length)

 

6

 

CTS load is AC (150

CTS load is DC (150 ohms)

 

 

ohms in series with 50 nF)

 

Technical Tip: We recommend that you set the switches 3, 4 and 5 on the RS-485/422 SLIM to the ON (up) position for most RS- 485 configurations.

Intellicon-NT960/PCI User's Manual, ver. 0.02