PowerNet 3270 Reference Manual
Connect, Inc.
2-2
February 1998
which can include synchronous modems, modem eliminators, modem sharing
units, MAU cables, HUBs, etc. All necessary equipment and configuration in each
of these environments is specific to the host and site requirements for each
installation. Therefore, the hardware connections for each site must be made on an
individual basis, and only general information is given here.
SDLC Communications Board
Each SNA/SDLC communications board has two, high density D-sub-miniature
female port connectors. The cables have a DB-15 male connector on the board end
and a DB-25 male connector on the peripheral end. Pinouts for each connector are
as follows:
Caution
The connectors on the SDLC board appear exactly like a VGA monitor
connection or a multiport concentrator connection.
Do not
plug any devices
other than the SDLC adapter cable into this board.
DB-15 Pin Number
Assignment
1
Not Connected
2
Transmitted Data (TXD)
Output
3
Received Data (RXD)
Input
4
Request To Send (RTS)
Output
5
Clear To Send (CTS)
Input
6
Data Set Ready (DSR)
Input
7
Signal Ground
8
Data Carrier Detect (DCD)
Input
12
Receive Clock (RXC)
Input
13
Transmit Clock (TXC)
Output
14
Transmit Clock (TXC)
Input
15
Data Terminal Ready (DTR) Output
DB-25 Pin NumberAssignment
1
Not Connected
2
Transmitted Data (TXD)
Output
3
Received Data (RXD)
Input
4
Request To Send (RTS)
Output
5
Clear To Send (CTS)
Input
6
Data Set Ready (DSR)
Input
7
Signal Ground
8
Data Carrier Detect (DCD)
Input
17
Receive Clock (RXC)
Input
24
Transmit Clock (TXC)
Output
DB-25 Pin NumberAssignment
15
Transmit Clock (TXC)
Input
20
Data Terminal Ready (DTR) Output
