IQ plus 810 - Rice Lake Weighing Systems

For RS-232 applications through the EDP port, neither of the integrated chips U22 nor U24 is installed on theirrespective soockets on the Main Board. J7-9 (IN), J7-11 (OUT), and J7-12 (GND) are used for the duplex RS-232 transmission. Simplex 20 mA output transmission is also available simultaneously on J7-10 (I- OUT) and J7-12 (I+ OUT). See Section 4, INSTALLATION AND WIRING for complete terminal connection information onserial ports.When used for RS-485 applications, the EDP port can be configured to operate as a transceiver on a multi-droptwisted-pair line. U24 must be installed in the proper socket on the Main Board to configure the EDP port as a485 transceiver. Before installing U24, make certain that U22 is NOT installed. J7-7 (RS-485-A) and J7-8 (RS-485-B) are used for RS-485 applications.For simplex 20 mA Current Loop applications, the EDP current loop transmitter is designed so that duplex RS-232and simplex 20 mA output are available simultaneously with the RS-232 configuration described above.For full duplex 20 mA Current Loop applications with simultaneous simplex RS232 transmission, the EDP portcan be configured as an active or passive current transmitter with an optically-isolated current receiver. U22 mustbe installed, and U24 must NOT be installed for duplex current loop applications. J7-7 (I+ IN), J7-8 (I- IN), J7-12(I+ OUT), and J7-10 (I- OUT) are used when the EDP port is configured for duplex 20 mA current loop applications.Terminal block J7 is used for connecting both the Electronic Data Processing (EDP) port and the Printer port. Bothports must first be configured for the specific application as described in the Setup and Configuration section of thismanual.EDP Port: RS-232 RS-485 (U24)** 20mA (U22)*J7-7 485-A I+ INJ7-8 485-B I - INJ7-9 RS-232 INJ7-10 I- OUTJ7-11 RS-232 OUTJ7-12 GND I+ OUT*To enable 20 mA CL, U22 has been installed at the factory; be certain that U24 is NOT installed.**To enable RS-485, U24 must be installed; be certain that U22 is NOT installed.5.2 PRINTER PORT (2nd serial port)The printer port on the IQplus 810 can be configured for simplex RS-232, and simultaneous simplex 20mACurrent Loop operation.For RS-232 applications, the printer port operates with the same voltage levels as the EDP port. When used forRS-232 applications, J7-5 (Tx) and J7-6 (GND) are used as wiring connections for the printer port. The printerport simultaneously provides simplex 20mA Current Loop output with no hardware configuration change necessary.The active current transmitter circuit is identical to the one used for the EDP port. J7-6 (I+ OUT) and J7-4(I- OUT) are used for wiring connections for current loop applications. See the Printer Port wiring chart on thefollowing page.When the printer port is used in the continuous mode for data transmission, it also transmits in the CC (ConsolidatedControls) data format reproduced on the previous page.5 - 2