PMAC2A-PC/104
ACC-2P Hardware Setup
11
ACC-2P HARDWARE SETUP
On the ACC-2P, you will see many jumpers (pairs of metal prongs), called E-points. Some have been
shorted together; others have been left open. These jumpers customize the hardware features of the ACC-
2P for a given application and must be setup appropriately. The following is an overview of the several
jumpers grouped in appropriate categories. For a complete description of the jumper setup configuration
please refer to the “ACC-2P E-POINT DESCRIPTIONS” chapter.
I/O Configuration Jumpers
E3-E4: JHW, PD Function Select
– When jumper E3 connects pins 1 and 2, a set of pulse and direction
signals can be output on channel 1 (pins 2 to 5) of the JHW, PD port. If E3 connects pins 2 and 3 then
channel 1 is configured as a handwheel encoder input. When jumper E4 connects pins 1 and 2, a set of
pulse and direction signals can be output on channel 2 (pins 6 to 9) of the JHW, PD port. If E4 connects
pins 2 and 3 then channel 2 is configured as a handwheel encoder input.
E5: I/O Gate address select
– If jumper E5 connects pins 1 and 2 the I/O features on the ACC-2P will be
accessed at the regular addresses and the JTHW port can be used as a multiplexer port. When E5
connects pins 2 and 3 the I/O features on the ACC-2P board will be accessed at the regular addresses plus
$40, and this is necessary only when both ACC-2P and ACC-1P are used with the same PMAC2A-
PC/104 base board.
E7-E10: Ports Direction Control
– These jumpers select the I/O lines direction of the JTHW and the
JOPT connectors. This allows configuring these ports as all inputs, all outputs or half inputs and half
outputs according to the following tables:
JTHW Connector
JOPT Connector
E7 E8
DATx
lines
SELx
lines
E9 E10
MOx
lines
MIx
Lines
OFF OFF
Output
Output OFF OFF
Output
Output
OFF ON
Output
Input OFF ON
Output
Input
ON OFF Input
Output
ON OFF Input
Output
ON ON Input
Input ON ON Input
Input
If E7 is removed or E8 is installed then the multiplexing feature if the JTHW port cannot be used.
Communication Jumpers
E6: Communications Port Selection
– When jumper E6 connects pins 1 and 2 the PC/104
communications port is enabled. If E6 connects pins 2 and 3 the Ethernet or USB ports are enabled. Only
one port can be used at a time. If either the Ethernet or USB ports are used then jumper E19 on the base
board must be installed and jumper E18 on the base board must be removed. In order to communicate
through the RS-232 serial port jumper E6 must be installed, either in position 1-2 or 2-3.
Resistor Packs Configuration
Differential or Single-Ended Handwheel Encoder Selection
The handwheel encoder differential input signal pairs to the PMAC have user-configurable pull-up/pull-
down resistor networks to permit the acceptance of either single-ended or differential signals in one
setting, or the detection of lost differential signals in another setting.
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 ...
