Data General AViiON 5000 Series, Customer Documentation

Page: 165 / 210

External Device Connector Pin Assignments
C-9
014–001867
Table C–3 VSC/3i Connector Signals
Pin
Electrical Interface
#
RS-232 RS-530, RS-449, X.21 V.35
1 Chassis Ground Shield A Shield
2 Transmit Data (TxD) > Transmit Data (TxD) A > Send Data (SD) A >
3 Receive Data (RD) < Receive Data (RD) A < Receive Data (RD) A <
4 Request to Send (RTS) > Request to Send (RTS) A > Request to Send (RTS) >
5 Clear to Send (CTS) < Clear to Send (CTS) A < Clear to Send (CTS) <
6 Data Set Ready (DSR) < Data Set Ready (DSR) A < Data Set Ready (DSR) <
7 Signal Ground (SG) Signal Ground (SG) A Signal Ground (SG)
8 Data Carrier Detect
(DCD)
<
Data Carrier Detect
(DCD)
A <
Data Carrier Detect
(DCD)
<
9 Receive Clock (RC) B < Serial Clock Receive (SCR)
B <
10 Data Carrier Detect
(DCD)
B <
11 Transmit Clock (TxC) B > Serial Clock Transmit
(SCTE)
B >
12 Transmit Clock (TxC) B < Serial Clock Transmit
(SCT)
<
13 Clear to Send (CTS) B <
14 Transmit Data B > Send Data (SD) B >
15 Transmit Clock (TxC) < Transmit Clock (TxC A < Serial Clock Transmit
(SCT)
A <
16 Receive Data (RxD) B < Receive Data (RxD) B <
17 Receive Clock (RC) < Receive Clock (RC) A < Serial Clock Receive (SCR)
A <
18
19 Request to Send (RTS) B >
20 Data Terminal Ready
(DTR)
>
Data Terminal Ready
(DTR)
A >
Data Terminal Ready
(DTR)
>
21
22 Data Set Ready (DSR) B <
23 Data Terminal Ready
(DTR)
B >
24 Transmit Clock (TxC) > Transmit Clock (TxC) A > Serial Clock Transmit
(SCTE)
A >
25
NOTE: < indicates signal received by controller.
> indicates signal transmitted by controller.
A and B indicate polarity.