THOMAS-CONRAD CORPORATION
TC6844 ARC CARD/SE30
|
NIC Type |
ArcNet |
|
Chip Set |
NCR 90C26 |
|
Data Bus |
Mac SE/30 |
|
Network Transfer Rate |
2.5Mbps |
|
Topology |
Linear Bus |
|
Wiring Type |
RG-62A/U 93ohm coaxial |
|
Boot ROM |
Not available |
|
CONNECTIONS | |||
|
Function |
Label |
Function |
Label |
|
Header to connector card |
J1A |
RG-62A/U 93ohm coaxial connector |
J2 |
|
Header to main board |
J1B | ||
|
EXTENDED RANGE CONFIGURATION | |||
|
Response Time |
Recon Time |
JP1 |
JP2 |
|
74.7 uS |
840 mS |
Open |
Open |
|
283.4 uS |
1.68 S |
Closed |
Open |
|
561.8 uS |
1.68 S |
Open |
Closed |
|
1.1186 mS |
1.68 S |
Closed |
Closed |
|
Note:This setting should only be changed when the length of the ArcNet segments exceed 6000 meters. | |||
|
NODE ADDRESS | ||||||||
|
Setting |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
SW1/7 |
SW1/8 |
|
1 |
Off |
On |
On |
On |
On |
On |
On |
On |
|
2 |
On |
Off |
On |
On |
On |
On |
On |
On |
|
3 |
Off |
Off |
On |
On |
On |
On |
On |
On |
|
4 |
On |
On |
Off |
On |
On |
On |
On |
On |
|
5 |
Off |
On |
Off |
On |
On |
On |
On |
On |
|
249 |
Off |
On |
On |
Off |
Off |
Off |
Off |
Off |
|
250 |
On |
Off |
On |
Off |
Off |
Off |
Off |
Off |
|
251 |
Off |
Off |
On |
Off |
Off |
Off |
Off |
Off |
|
252 |
On |
On |
Off |
Off |
Off |
Off |
Off |
Off |
|
253 |
Off |
On |
Off |
Off |
Off |
Off |
Off |
Off |
|
Note: A total of 253 node address settings are available. The switches are a binary representation of the decimal node addresses. SW1/8 is the Most Significant Bit and switch SW1/1 is the Least Significant Bit. The switches have the following decimal values: SW1/8=128, SW1/7=64, SW1/6=32, SW1/5=16, SW1/4=8, SW1/3=4, SW1/2=2, SW1/1=1. Turn off the switches and add the values of the switches that are off to obtain the correct node address. (Off=1, On=0)Addresses 0, 254, and 255 are reserved and should not be used. | ||||||||
