3. MIU'S LED, SWITCH & SERIAL CONNECTOR SPECIFICATIONS
The CIU/485 communicates with industrial controllers through RS-485 compatible serial signaling. The RS-485 signal levels are used to interconnect with RS-485 compatible embedded controllers. The RS-232E signal levels are used to configure the CIU. The RS- 232E signal levels are also used to interconnect with RS-232E compatible embedded controllers if required.
The RS-232E is present on DB9(MIU), RS485 signal levels are available via four pins' connectors.
4.1The following lists the CIU/485 serial interfaces. All connector definitions are described in Appendix A
RS-232 Configuration Connector (P2)
| | Connector Type: | DB9, (MIU) female, straight board mounts. |
| | Signal Levels: | RS-232 |
RS485 | Configuration Connector (P1) |
| | Connector Type: | 4 pin terminal header with .138 spacing |
| | Signal Levels: | RS485 |
3.2 MIU/485 | LED | |
LED Blinks every 4 seconds with AC / DC power |
3.3 MIU/485 | LED & Switch 1 (internal) |
S1-1 | Closed (ON) LED Blinks with option CD (&C1 AT command) active |
S1-2 | Closed (ON) LED Blinks AC. DC Power ON Note select either 1 or 2 |
S1-3 | Closed, option modem DTR | select DB9 DTR |
S1-4 Closed, option modem DTR | select modem's CD |
3.4 MIU/485 Switch S3 (external)
S3-2 Closed (ON) only for MIU/485 (J1) modem configuration or for RS232 embedded controllers.
S3-1,-3 &-4 Open (OFF)
S3-1 Closed (ON) only for MIU/485 (P1) RS485 connector (RS485 embedded controllers)
S3-2,-3 &m-4 Open (OFF)
3.5 MIU/485 A switch (external)
SA-1 Closed (ON) RS485 received data disable TX (Driver Output Enable) SA-2 Closed (ON) RS485 transmit data enable TX (Driver Output Enable) + 5ms SA-3 Closed (ON) RS485 RTS enable TX (Driver Output Enable) should be
Open (OFF)
SA-4 Closed (ON) RS485 received data is disables with TXD
Install Op and Diags for MIU Modems and RS485 (0049-0002-010A) | Page 2 of 16 |
