Data and Control Ports
Seanet SCU v5
0581-SOM-00002, Issue: 05
22
© Tritech International Ltd.
ARCNET Port
DA-15 female connector, providing access to:
• Is12V and +5V supplies.
• Isolated and protected TTL ARCNET connections (LAN PULSE1, LAN PULSE2, LAN EN
and LAN RX).
• Isolated and protected differential ARCNET connections (LAN A, LAN B).
• Optional connections to “Port A” serial interface signals – consult factory for details.
ARCNET
4 5
1 2
8
10
6
3
7
12
9
11
14
13
15
SCU DA-15 female connector
Pin
Connection
Pin
Connection
1
nc
9
+12v DC
2
COMMS Ground
10
VCC
3
Ground
11
LAN EN
4
LAN RX
12
RS232 RTX
5
RS232 CTS
13
RS232 RX
6
RS232 TX
14
LAN PULSE1
7
LAN PULSE2
15
LAN B
8
LAN A
nc = not connected
• Signals on pins 4, 5, 6, 7, 8, 11, 12, 13, 14 and 15 are with respect to the ground on pin 2.
• The +12V output on pin 9, and the +5V output on pin 10 is with respect to pin 3, External
Ground.
• The RS-232 signals on pins 5, 6, 12, 2 and 13 are present simultaneously on this connector
and the DE-9 connector
PORT A
.
RAT Interface
A single 9-Way D-Type Female connector for connection to a V2 RAT (with PS2 mouse and
RS-485 data signals only)
RAT
4 5
1 2
8
6
3
7
9
SCU DE-9 female connector
Pin
Function
1
GROUND
2
+5v DC
3
RAT RS485 B
4
RAT RS485 A
5
‡
6
‡
7
PS/2 SCLK
8
PS/2 SDATA
9
+12v DC
‡ = connected for handshaking only.