Data General AViiON 5000 Series, Customer Documentation

Page: 168 / 210

External Device Connector Pin Assignments
C-12
014–001867
VLC Interface Connector
The VLC LAN controller interface provides a 15-pin D connector for an AUI cable.
The AUI cable connects the computer to an external Media Attachment Unit (MAU).
The MAU contains the Ethernet transceiver and the Media Dependent Interface
(MDI) for connection to the physical network. Figure C–8 shows the signals and pin
numbers for these connectors.
Pin Signal Circuit Name
1 Ground CI–S (Control In circuit shield)
2 Col CI–A (Control In circuit A)
3 Tr DO–A (Data Out circuit A)
4 Ground DI–S (Data In circuit shield)
5 R DI–A (Data In circuit A)
6 Ground VC (Voltage common)
7 No Connect CO–A (Control Out circuit A)
8 Ground CO–S (Control Out circuit shield)
9 Collision – CI–B (Control In circuit B)
10 Transmit – DO–B (Data Out circuit B)
11 Ground DO–S (Data Out circuit shield)
12 Receive – DI–B (Data In circuit B)
13 +12 Volts VP (Voltage plus)
14 Ground VS (Voltage shield)
15 No Connect CO–B (Control Out circuit B)
Pin 1
Pin 8
Pin 9
Pin 15
VLC LAN connector (female)
The connector shell acts as a protective ground
Figure C–8 VLC Connector Signals