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       # CTC UNION TECHNOLOGIES CO., LTD.
       
          IC485 IP-1
       
          Card Type   Current Loop Converter                             
          I/O Options RS-485 via terminal block, RS-232 via DB-25        
                      connector, DC power                                
          Data Bus    External                                           
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        | Label |    Function    | Label |  |
          |------------------------+-------+----------------+-------|  |
          | Button – unidentified  |  BT   | RS-485 via     |  CN2  |  |
          | function               |       | terminal block |       |  |
          |------------------------+-------+----------------+-------|  |
          | RS-232 via DB-25       |  CN1  | DC power       |  CN3  |  |
          | connector              |       |                |       |  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                Function                 | Label | Position |
          |-----------------------------------------+-------+----------|
          | í Unit configured for DCE operation     |  SW1  |    On    |
          |-----------------------------------------+-------+----------|
          | Unit configured for DTE operation       |  SW1  |   Off    |
          |-----------------------------------------+-------+----------|
          | í Unit configured for monitor mode      |  SW2  |   Off    |
          |-----------------------------------------+-------+----------|
          | Unit configured for simulation mode     |  SW2  |    On    |
          |-----------------------------------------+-------+----------|
          | í Unit configured for half-duplex       |  SW3  |    On    |
          | operation                               |       |          |
          |-----------------------------------------+-------+----------|
          | Unit configured for full-duplex         |  SW3  |   Off    |
          | operation                               |       |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED   |  Color  | Status  |           Condition           |
          |--------+---------+---------+-------------------------------|
          |  LED1  |   Red   |   On    |    Unit is receiving power    |
          |--------+---------+---------+-------------------------------|
          |  LED1  |   Red   |   Off   |  Unit is not receiving power  |
          |--------+---------+---------+-------------------------------|
          |   RD   |   Red   |   On    |    Unit is receiving data     |
          |--------+---------+---------+-------------------------------|
          |   RD   |   Red   |   Off   |  Unit is not receiving data   |
          |--------+---------+---------+-------------------------------|
          |   TD   |   Red   |   On    |   Unit is transmitting data   |
          |--------+---------+---------+-------------------------------|
          |   TD   |   Red   |   Off   | Unit is not transmitting data |
          +------------------------------------------------------------+