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# WESTERMO TELEINDUSTRI AB
MA-21
Card Type Modem (asynchronous)
Chip Set Unidentified
I/O Options DC power, RS-232-C, 20 mA current loop
via 5-pin terminal block
Maximum Modem Rate 19.2Kbps
Data Modulation C/CCITT V.24/V.28
Protocol
Error Unidentified
Correction/Compression
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------------+-------+---------------+-------|
| Power connector (terminal | CN1 | RS-232-C port | CN3 |
| block) | | | |
|----------------------------+-------+---------------+-------|
| Terminal block | CN2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------+-----------+--------------|
| ? 115V AC enabled | S5 | On |
|---------------------------------+-----------+--------------|
| 230V AC enabled | S5 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMITTED SIGNAL SELECTION |
|------------------------------------------------------------|
| Setting | S1/1 | S1/2 | S1/3 | S1/4 |
|-----------------+----------+----------+----------+---------|
| ?? TD pin 2 | On | Off | Off | Off |
|-----------------+----------+----------+----------+---------|
| AUX pin 11 | Off | On | Off | Off |
|-----------------+----------+----------+----------+---------|
| SRS pin 19 | Off | Off | On | Off |
|-----------------+----------+----------+----------+---------|
| DTR pin 20 | Off | Off | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CTS CONRTOL SELECTION |
|------------------------------------------------------------|
| Setting | S1/5 | S1/6 | S1/7 | S1/8 | S1/9 |
|---------------+--------+--------+--------+--------+--------|
| ? RTS | On | Off | On | On | Off |
|---------------+--------+--------+--------+--------+--------|
| RD | Off | On | Off | On | Off |
|---------------+--------+--------+--------+--------+--------|
| Always High | On | Off | Off | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMITTER/RECEIVER SELECTION |
|------------------------------------------------------------|
| Transmitter | Receiver | S2/1 | S2/2 | S2/3 | S2/4 |
| Setting | Setting | | | | |
|--------------------+-----------+------+------+------+------|
| ? Normal | Normal | On | Off | On | Off |
|--------------------+-----------+------+------+------+------|
| Inverted | Normal | Off | On | On | Off |
|--------------------+-----------+------+------+------+------|
| Normal | Inverted | On | Off | Off | On |
|--------------------+-----------+------+------+------+------|
| Inverted | Inverted | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RECEIVER ACTIVE/PASSIVE SELECTION |
|------------------------------------------------------------|
| Setting | S3/1 | S3/2 | S3/3 | S3/4 | S3/5 | S3/6 |
|------------+-------+-------+-------+-------+-------+-------|
| ? Passive | On | On | Off | Off | Off | Off |
|------------+-------+-------+-------+-------+-------+-------|
| Active | Off | Off | On | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMITTER ACTIVE/PASSIVE SELECTION |
|------------------------------------------------------------|
| Setting | S4/1 | S4/2 | S4/3 | S4/4 | S4/5 | S4/6 |
|------------+-------+-------+-------+-------+-------+-------|
| ? Passive | On | On | Off | Off | Off | Off |
|------------+-------+-------+-------+-------+-------+-------|
| Active | Off | Off | On | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| *DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------------+--------+-----------------------------|
| LED1 | Unidentified | On | Power is on |
|------+--------------+--------+-----------------------------|
| LED1 | Unidentified | Off | Power is off |
|------+--------------+--------+-----------------------------|
| LED2 | Unidentified | On | Data is being transmitted |
|------+--------------+--------+-----------------------------|
| LED2 | Unidentified | Off | Data is not being |
| | | | transmitted |
|------+--------------+--------+-----------------------------|
| LED3 | Unidentified | On | Data is being received |
|------+--------------+--------+-----------------------------|
| LED3 | Unidentified | Off | Data is not being received |
+------------------------------------------------------------+