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Connector Pinouts and LEDs
DS1104 Hardware Installation and Configuration March 2004
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I/O Connector (P1)
The I/O connector (P1) is a 100-pin, high density KEL connector. It is
used to obtain access to the I/O signals of the board. The connector is
located on the bracket of the DS1104, see Board Overview on
page 78.
Adapter cable Using the adapter cable supplied with the board, the I/O connector
(P1) can be linked to two 50-pin, female Sub-D connectors (labeled
P1A, P1B).
Signal specification For detailed information (I/O circuits, electrical characteristics, etc.) on
the I/O lines terminating at the I/O connector, see Signal Connection to
External Devices on page 119.
N
For the DS1104, the total load of the connector pins providing VCC
(P1 19 and P1 20; P1A 4 and P1B 4 on the Sub-D connectors) must
not exceed 500 mA.
The VCC lines are protected against short circuits by a common
multifuse on the DS1104.
If VCC is overloaded or shorted, the multifuse on the DS1104 is
heated up by the overcurrent and abruptly raises its resistance. To reset
the multifuse to its initial low resistance, turn off the power for some
minutes to allow the multifuse to cool down.
Pinout of I/O connector The following table shows the pin assignment of the I/O connector
(P1). It also provides the mapping to the Sub-D connectors of the
adapter cable.
Signal names in parentheses apply when the UART is set to the RS422
or RS485 mode.
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