Connect Tech NT960/PCI - Manual (Page 68)

4-16 Chapter 4: Appendix D - RS-485/422 Option
Intellicon-NT960/PCI User's Manual, ver. 0.02
Table 7: RS-485/422 SLIM; port/switch block relation
Port
number SLIM
socket Switch
block Port
number SLIM
socket Switch
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
Position Configuration
(when OFF) Configuration
(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
bias and load circuits
Note: These two switches
MUST be used together
RxD connected to bias and
load circuits
5 RxD load is AC (150
ohms in series with 50 nF
and > 50 metres in length) RxD load is DC (150 ohms
and < 50 metres in length)
6 CTS load is AC (150
ohms in series with 50 nF) CTS load is DC (150 ohms)
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.