Data General AViiON 5000 Series, Customer Documentation

Page: 169 / 210

External Device Connector Pin Assignments
C-13
014–001867
VLCi Interface Connector
The VLCi controller provides a standard IEEE 802.3 local area network DTE
interface through a 15–pin sub–D connector. This connector accepts an Access Unit
Interface (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–9 shows the signals and pin numbers for the VLCi external connector.
Pin Circuit Name
1 CI–S (Control In circuit shield)
2 CI–A (Control In circuit A)
3 DO–A (Data Out circuit A)
4 DI–S (Data In circuit shield)
5 DI–A (Data In circuit A)
6 VC (Voltage common)
7 CO–A (Control Out circuit A)
8 CO–S (Control Out circuit shield)
9 CI–B (Control In circuit B)
10 DO–B (Data Out circuit B)
11 DO–S (Data Out circuit shield)
12 DI–B (Data In circuit B)
13 VP (Voltage plus)
14 VS (Voltage shield)
15 CO–B (Control Out circuit B)
Pin 1
Pin 8
Pin 9
Pin 15
VLCi connector to LAN
(female)
The connector shell acts as a protective ground
Figure C–9 VLCi Connector Signals