Comtech EF Data SFC1800A - Manual (Page 70)

Rear Panel Interfaces SFC1800A Synthesized Frequency Upconverter
5-4 TM111 - Rev. 1.0
5.7 Terminal (J6)
The Terminal Port allows for complete control and monitoring of all Upconverter parameters and
functions via an RS-232 Serial Interface. The interface comes configured as a DCE device. The
pinout is given in Table 5-4.
Table 5-4. J8 – Terminal Port – D-Sub 9-Pin Female Connector
Pin No. Signal I/O Description
2 TX_232 O RS-232 transmit
3 RX_232 I RS-232 receive
5 GND N.A. Ground
1, 4, 6, 7, 8, 9 N.A. N.A. No Connect
5.8 Ethernet (J9)
The Ethernet connector can be used for monitor & control functions of the upconverter. The
physical interface is a standard RJ-45 connector.
5.9 Equipment RS-485 (J10), Standard Backward Compatible Interface
The Equipment Multi-Drop, Full-Duplex, Bi-directional RS-485 Interface (J10) allows
communication between converters. Because the RS-485 Interface uses a master/slave
(talker/listener) configuration, the converter that is designated as the backup will automatically be
established as the master. Under normal RS-485 protocol, the master will poll a specific slave by
address and only then will the slave unit respond. The swapping of Transmit Data and Receive
Data is accomplished in the inter-converter cables, as the hardware interface is identical for all
converters. Refer to Table 5-5 for the connector pinout.
Table 5-5. J6 – Equipment RS-485 Interface - D-Sub 9-Pin Female Connector
Pin No. Signal
I/O Description
1 GND N.A. Ground
2 I2C_SCL O I2C Clock
3 N.C. N.A. No Connect
4 TX_485-B O Inverted RS-485 transmit
5 TX_485-A O Non-Inverted RS-485 transmit
6 I2C_SDA I/O I2C Data
7 N.C. N.A. No Connect
8 RX_485-B I Inverted RS-485 receive
9 RX_485-A I Non-Inverted RS-485 receive