Scanlab RTC 5 PC Interface Board Installation And Operation Manual page 585

JP19: +5 V Power Supply
®
The RTC 5 PC/104-Plus board requires a +5 V power
supply. This isn't available from all CPU boards on the
PCI bus, but is almost always available on the ISA bus
(if present). Therefore, the delivered RTC
Plus board's default configuration is for 5 V power
provided exclusively via the ISA bus (JP19 open).
If a CPU board has no ISA bus, or if the ISA bus isn't
connected to the CPU board, then Jumper JP19 (on
®
the front side of the RTC 5 PC/104-Plus board, see
figure 61 on page 577) can be rejumpered so that
power is supplied via the PCI bus, assuming that a
+5 V supply voltage is available there (be sure to
check your CPU board's corresponding specifica-
tions).
JP19 +5 V power supply
open * via the ISA bus
closed via the PCI bus
(only if the ISA bus is not available)
* default configuration
Caution!
• JP19 must not be closed if the RTC
Plus board connects to the CPU board via both
the PCI and ISA busses and the CPU board
supplies +5 V at both busses. Power provided at
both busses might damage the RTC
Plus board.
®
RTC 5 PC Interface Board
Rev. 1.9 e
®
15 Appendix A: The RTC 5 PC/104-Plus Board
JP10+12: 10 V Output Voltage for
ANALOG OUT1 and ANALOG OUT2
Jumpers JP10+JP12 on the back side of the
®
RTC 5 PC/104-Plus board (see
®
5 PC/104- page 578) allow setting how the 10 V maximum
output voltage is generated at analog output ports
ANALOG OUT1 and ANALOG OUT2 on the LASER and
MULTI connectors:
Jumpers JP10+JP12
Position 1-2
Position 2-3*
open
* default configuration
• Ensure that JP10 and JP12 are not jumpered
differently (e.g. don't set JP10 for position 1-2
and JP12 for position 2-3). Otherwise, the
board's electronics will be damaged.
®
5 PC/104-
PCI Local Bus Specification Revision 2.2 requires that
the PCI bus (pins A29 and A30) provide a ±12 V
supply. In reality, not all CPU boards supply this
voltage. Therefore, the RTC
®
5 PC/104-
factory configured so that the 10 V maximum output
voltage is derived from the +5 V supply voltage
(provided either via the PCI bus or the ISA bus, see
"JP19: +5 V Power
set for position 2-3). In this configuration, the
maximum output current is +5 mA (source only).
If the CPU board actually provides ±12 volts (check
the corresponding specifications of your CPU board),
then rejumper as follows: both jumpers (JP10 and
JP12) in position 1-2. Then the maximum output
current is ±5 mA (source and sink).
figure 62 on
10 V Output Voltage
derived from the ±12 V
supply of the PCI bus
derived from the +5 V
supply of the PCI/ISA bus
not provided
Caution!
®
5 PC/104-Plus board is
Supply") (JP10 and JP12 are both
585