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APE1553-1/2(-DS) Hardware Manual
27
Connectors:
DSUB9 Frontpanel-Connector
MIL-Bus:
MIL-STD-1553 isolated, transformer or direct coupled
stub connections.
Emulates a 70 Ohm transformer coupled network
stub if programmed accordingly.
HD-DSUB26 Frontpanel-Connector
Trigger In: TTL-Input, 1.5 k Pulldown and 220pF EMV
capacitor. Rising Edge sensitive, Pulse width > 75ns
Trigger Out: TTL-Output with 82 Ohm series resistor, 220pF
EMV capacitor, High Pulse width strobe, 500ns
duration.
IRIG-IN:
AC-coupled buffered Input app. 10kOhm, 220pf EMV
capacitor. 0,5 to 5.0 Vpp input voltage
IRIG-OUT:
AC-coupled Output resistor ~ 51
Ω
, with high speed
EMV varistor. ~ 3 Vpp output voltage
MILScope:
External MILScope Channels A/B
Discrete I/O: Two user programmable Discrete-I/O’s, Input/Output
selection done by software.
Input High voltage
3.0V min…35.0V max
Input Low voltage
0.0V min…0.8V max.
Output High voltage
4V appr.
Output Low voltage
0.4V max
Max. Sink Current of each open collector 100mA
Please note:
When the default 5V for the discrete outputs are not used, provide
a serial resistor in line with the open collector transistor. If using a
discrete pin as input, make sure that the output mode is set to
default before connecting an external voltage.
Otherwise the transistor can be damaged.
Board to Board Connector (B2B)
A 16-pin ribbon cable connector for the GPIO's and B2B-IRIG
(i.e. a Board to Board connection between multiple APE1553
boards inside a PC can be established for Board to Board I/O)
Discrete I/O: For Discrete I/O specification see above.