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CHAPTER 1: Specifications
1. Specifications
Compliance: CE; FCC Part 15 Subpart B Class A, IC Class/classe A
Interfaces: EIA/TIA RS-232, DTE or DCE (user-selectable);
EIA/TIA RS-422/485
Protocol: Asynchronous
Data Rate: Transparent to data rates up to 64 kbps
Data Format: Transparent to data format
Flow Control: Transparent to software flow control; holds RS-232
hardware flow-control outputs high, but can be set so
that RS-232 hardware flow-control inputs (DTR or RTS)
enable the RS-422/485 driver
Operation: RS-422/485: 4-wire full duplex, point-to-point or
multipoint
Maximum Distance: RS-232: 50 ft. (15.2 m) to attached device
RS-422/485: 4000 ft. (1219.2 m) to farthest attached
device
User Controls: All board-mounted;
(1) 8-position DIP-switch jumper for DTE vs. DCE;
(1) 1-position DIP switch for RS-422/485 termination;
(1) Jumper for RS-422/485 always ON vs. controlled;
(1) Jumper for RS-422/485 controlled by DTR vs. RTS;
(1) Jumper/solder terminal for interconnection of frame
ground and RS-232 signal ground
Indicators: (3) Front-mounted LEDs: TX, RX, POWER
Connectors: RS-232: (1) DB25 female;
RS-422/485: (1) 4-position terminal block
Leads/Signals
Supported: RS-232: Pins 1 through 8 and 20 (PGND, TD, RD, RTS,
CTS, DSR, SGND, DCD, and DTR);
RS-422/485: TXA, TXB, RXA, RXB;
For additional information, see the Appendix