
PMAC2A-PC/104
Machine Connections
19
Serial Port (JRS232 Port)
For serial communications, use a serial cable to connect your PC's COM port to the J8 serial port
connector present on the PMAC2A-PC/104 base board. Delta Tau provides the Accessory 3L cable for
this purpose that connects the PMAC to a DB-9 connector. Standard DB-9-to-DB-25 or DB-25-to-DB-9
adapters may be needed for your particular setup. If a cable needs to be made, the easiest approach is to
use a flat cable prepared with flat-cable type connectors as indicated in the following diagram:
ACC-2P Ethernet RJ45 Connector
(J10 Port)
This connector is used for Ethernet communications from the ACC-2P to a PC, and it is provided when
ACC-2P Option 1B is ordered. The PC must have a card dedicated solely to the PMAC network. The
appropriate Category 5 10/100-Base T network cable that mates to this connector can be readily
purchased from any local computer store. The type of network cable to purchase depends on the
configuration to the host PC.
When making a
direct
connection to a Host communication Ethernet card in a PC a “cat 5 networking
crossover cable”
must
be used. A standard cat 5 straight through networking cable cannot be used in this
scenario. When using a connection to a network hub or switch, the standard cat 5 straight through
networking cable must be used, and not a crossover cable.
Performance can be degraded seriously by the use of a hub or switch. Network hubs or the more
intelligent network switches have processors inside them, which can add delays of at least 15msec to the
PMAC communications.
ACC-2P USB Connector (J1 Port)
This connector is to be used in conjunction with USB A-B cable, which can be purchased from any local
computer store, and it is provided when ACC-2P Option 1A is ordered. The A connector is connected to
a PC or Hub device; the B connector plugs into the ACC-2P J1 port.
PMAC (DB-9S)
PC (DB-9)
1 (No connect)
1 (No connect)
2 (TXD/)
2 (RXD)
3 (RXD/)
3 (TXD)
4 (DSR)
4 (DTR)
5 (Gnd)
5 (Gnd)
6 (DTR)
6 (DSR)
7 (CTS)
7 (RTS)
8 (RTS)
8 (CTS)
9 (No connect)
9 (No connect)
DB-9
Female
1
1
DB-9
Male
Summary of Contents for PMAC2A-PC/104
Page 2: ......
Page 14: ...PMAC2A PC 104 Base Board Hardware Setup 8 ...
Page 34: ...PMAC2A PC 104 PMAC2A PC 104 Software Setup 28 ...
Page 41: ...PMAC2A PC 104 ACC 1P Hardware Reference Summary 35 ...
Page 51: ...PMAC2A PC 104 Base Board E Point Jumper Descriptions 45 ...
Page 55: ...PMAC2A PC 104 Acc 1P E Point Jumper Descriptions 49 ...