Hardware manual

2 Installation EUROCOM-17-5xx
34 Hardware Manual
2.1.2 Serial Interface
Level
Converter
(SILC)
The Serial Interface Level Converter (SILC) modules generally convert
TTL-level signals generated or accepted by the SCC-2 to the appropriate
signal levels for external transmission lines. SILC modules for RS232C,
RS422 and RS485 are available.
The mechanical outline of the SILC modules allows the changeability of
the different SILC modules on the EUROCOM-17-5xx.
• SILC-200 for RS232
• SILC-300 for RS422
• SILC-400 for RS485
The mechanical part of the installation is very easy. First switch off the
VMEbus system and pull the board out of the rack. If a SILC module is
already placed in the connector, remove it carefully. Now plug the new
SILC module into the corresponding connector on the CPU or I/O board.
Consider the polarization of the SILC module. To avoid damage, check
that the pin1 marked on the back of the SILC fits to pin1 marked on the
board.
2.1.3 Installation
Parallel I/O
In addition, a 8-bit parallel port with handshake signals is available on the
EUROCOM-17-5xx. The port signals are connected via connector X102
and the ADAP-200/220 to the CONV-300 board. The three 9-pin Sub-D
serial plugs, a 25-pin Sub-D parallel connector to support Centronics
printer interface and a 26-pin connector for direct access to the CIO pins
for user applications are installed on the CONV-300.
The printer port has to be enabled by jumper J1 on the CONV-300 board.
A general 25-pin Sub-D to Centronics printer port cable is used to connect
a parallel printer to the EUROCOM-17-5xx. The printer port supports the
following buffered hardware lines:
D(1:8), /STROBE, /ACK, BUSY, and PE.
For user-defined usage of the CIO parallel ports the printer port has to be
disabled with jumper J1 located on the CONV-300. After that the 26-pin
parallel I/O port supports two CIO parallel ports. For more information
about the CIO, refer to the Z8536 data sheet and the CONV-300 Hardware
Manual.