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# DIGI INTERNATIONAL, INC.
MC/4I+, MC/8I+ (RS-422/485 VERSION)
Card Type Serial
Processor 80C186
Processor Speed Unidentified
Chipset Unidentified
Maximum Onboard 256KB dual-ported RAM
Memory
I/O Options Serial ports (5 for MC/4i+, 9 for MC/8i+)
Data Bus MCA
Card Size Full height, full length
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------------+-------+---------------+-------|
| RS-422 or RS-485 | CN1 | Header to H2B | H2A |
| asynchronous serial ports | | | |
| via DB-78 connector | | | |
|----------------------------+-------+---------------+-------|
| RS-422 or RS-485 | CN2 | Header to H2A | H2B |
| synchronous serial port | | | |
| via RJ-45 connector | | | |
|----------------------------+-------+---------------+-------|
| Header to H1B | H1A | Header to H3B | H3A |
|----------------------------+-------+---------------+-------|
| Header to H1A | H1B | Header to H3A | H3B |
|------------------------------------------------------------|
| Note:Standard serial ports are provided on an |
| included adapter cable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|-----------------------------------+-------+----------------|
| ยป | Shared memory window is 32KB | JP1 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Shared memory window is 128KB | JP1 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EPROM SIZE SELECTION |
|------------------------------------------------------------|
| Setting | J5 | J6 |
|------------------+--------------------+--------------------|
| 16KB | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 32KB | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 64KB | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 128KB | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SYNCHRONOUS PORT PINS 1 & 2 CONFIGURATION |
|------------------------------------------------------------|
| Pin 1 | Pin 2 | J1 |
|----------------------------+------------------+------------|
| CTS positive | CTS negative | Pins 1 & 2 |
| | | closed |
|----------------------------+------------------+------------|
| Receive/transmit clock | Receive/transmit | Pins 2 & 3 |
| positive | clock negative | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SYNCHRONOUS PORT PINS 9 & 10 CONFIGURATION |
|------------------------------------------------------------|
| Pin 9 | Pin 10 | J2 |
|----------------------------+------------------+------------|
| RTS positive | RTS negative | Pins 1 & 2 |
| | | closed |
|----------------------------+------------------+------------|
| Transmit/receive clock | Transmit/receive | Pins 2 & 3 |
| positive | clock negative | closed |
+------------------------------------------------------------+