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# WESTERMO TELEINDUSTRI AB
TD-23 AC
Card Type Modem
Chip Set Unidentified
I/O Options 9-pin serial port (RS-232), terminal blocks
(3)
Data Modulation ITU-T V.11, V.23, V.24/V.28
Protocol
Wiring Type Unshielded twisted pair
Maximum Transfer 1200bps
Rate
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Relay connector | CN1 | AC power | CN4 |
| (screws 1 & 2) | | connector (3 | |
| | | pole terminal | |
| | | block) | |
|------------------------+-------+-----------------+---------|
| RS-232-C/V.24 | CN2 | Line connector | CN5 |
| interface (screws 3 - | | (4 pole | |
| 5) | | terminal block) | |
|------------------------+-------+-----------------+---------|
| RS-422/485 interface | CN3 | 9-pin serial | CN6 |
| (screws 6 - 9) | | port | |
|------------------------------------------------------------|
| Note: CN1, CN2, & CN3 are separate interfaces on a 9 pole |
| terminal block |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|-----------------------------------------+-------+----------|
| í 2-wire mode enabled (line side) | S2/6 | On |
|-----------------------------------------+-------+----------|
| 4-wire mode enabled enabled (line side) | S2/6 | Off |
|-----------------------------------------+-------+----------|
| í 23ms RTS/CTS delay enabled | S2/9 | Off |
|-----------------------------------------+-------+----------|
| 60ms RTS/CTS delay enabled | S2/9 | On |
|-----------------------------------------+-------+----------|
| í Activity timer disabled | S3/7 | Off |
|-----------------------------------------+-------+----------|
| 1min activity timer enabled | S3/7 | On |
|-----------------------------------------+-------+----------|
| í Filter enabled; receive data is | S3/8 | On |
| buffered for 6ms | | |
|-----------------------------------------+-------+----------|
| Filter disabled | S3/8 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE TERMINATION |
|------------------------------------------------------------|
| Setting | S1/1 | S1/2 |
|---------------------------------------+----------+---------|
| í Line termination disabled | Off | Off |
|---------------------------------------+----------+---------|
| Line termination enabled | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMISSION LEVEL |
|------------------------------------------------------------|
| Setting | S2/1 | S2/2 | S2/3 |
|-----------------------------+---------+----------+---------|
| 3dBm | Off | Off | Off |
|-----------------------------+---------+----------+---------|
| -3dBm | On | Off | Off |
|-----------------------------+---------+----------+---------|
| -6dBm | Off | On | Off |
|-----------------------------+---------+----------+---------|
| í -9dBm | On | On | Off |
|-----------------------------+---------+----------+---------|
| -10dBm | Off | Off | On |
|-----------------------------+---------+----------+---------|
| -12dBm | On | Off | On |
|-----------------------------+---------+----------+---------|
| -13dBm | Off | On | On |
|-----------------------------+---------+----------+---------|
| -15dBm | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DCD DETECTION LEVEL |
|------------------------------------------------------------|
| Setting | S2/4 | S2/5 |
|---------------------------------------+----------+---------|
| í 3dBm | Off | On |
|---------------------------------------+----------+---------|
| 10dBm | On | On |
|---------------------------------------+----------+---------|
| -3dBm | On | Off |
|---------------------------------------+----------+---------|
| -15dBm | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CARRIER CONTROL |
|------------------------------------------------------------|
| Setting | S2/7 | S2/8 |
|----------------------------------------------+------+------|
| í Carrier controlled by RTS | On | On |
|----------------------------------------------+------+------|
| Transmitter activated by incoming data; data | Off | On |
| is buffered while carrier is established | | |
|----------------------------------------------+------+------|
| Permanent carrier established | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 2-WIRE/4-WIRE MODE SELECTION (RS-422/485 SIDE) |
|------------------------------------------------------------|
| Setting | S3/1 | S3/2 |
|---------------------------------------+----------+---------|
| í 2-wire mode enabled | On | Off |
|---------------------------------------+----------+---------|
| 4-wire mode enabled enabled | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RS-422/485 TERMINATION |
|------------------------------------------------------------|
| Setting | S3/3 | S3/4 | S3/5 | S3/6 |
|--------------------------------+------+------+------+------|
| í RS-422/485 termination | Off | Off | Off | Off |
| disabled | | | | |
|--------------------------------+------+------+------+------|
| 2-wire termination enabled | On | On | Off | Off |
| (RS-485) | | | | |
|--------------------------------+------+------+------+------|
| 4-wire termination enabled | Off | Off | On | On |
| (RS-422) | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------------+--------+------------------------------|
| PWR | Unidentified | On | Power is on |
|-----+--------------+--------+------------------------------|
| PWR | Unidentified | Off | Power is off |
|-----+--------------+--------+------------------------------|
| RD | Unidentified | On | Modem is receiving data |
|-----+--------------+--------+------------------------------|
| RD | Unidentified | Off | Modem is not receiving data |
|-----+--------------+--------+------------------------------|
| TD | Unidentified | On | Modem is transmitting data |
|-----+--------------+--------+------------------------------|
| TD | Unidentified | Off | Modem is not transmitting |
| | | | data |
|-----+--------------+--------+------------------------------|
| RTS | Unidentified | On | RTS signal is high |
|-----+--------------+--------+------------------------------|
| RTS | Unidentified | Off | RTS signal is low |
|-----+--------------+--------+------------------------------|
| CTS | Unidentified | On | CTS signal is high. Device |
| | | | ready to send data |
|-----+--------------+--------+------------------------------|
| CTS | Unidentified | Off | CTS signal is low |
|-----+--------------+--------+------------------------------|
| DCD | Unidentified | On | Data carrier present |
|-----+--------------+--------+------------------------------|
| DCD | Unidentified | Off | Data carrier not present. |
| | | | Connection not established |
+------------------------------------------------------------+