Reference Manual

Table Of Contents
Appendix B: RF Board Pin-Out
The LRS455 Wireless Data Radio series radios are available in both TTL and RS232 versions.
l The TTL versions use reverse polarity from standard RS232 at 0 to 5 Volt levels.
l All pin descriptions and pin numbering are the same as the RS232 version.
l The RS232 versions use standard RS232 polarity and voltage levels for all of the RS232
signal lines (DTR, Transmit Data, Receive Data, Carrier Detect, RTS, and Clear to Send)
and TTL standard polarity and voltage level for the Interrupt pin.
l Pin 1 - B+ Power input.
l Pin 2 - Interrupt (INT) Input A 0 volt level on this pin switches the radio into Setup
mode.
Note: Pin 1 on the board-level radios is the pin farthest from the three LEDs and pin 10 is the closest
to the LEDs.
Pin Assignment Color on ACS3610xx Cable
1 B+ input Red
2 Interrupt (temporarily ground to invoke menu) Brown
3 Data Terminal Ready (DTR) Orange
4 Ground Black
5 Transmit Data (TXD) Yellow
6 Ground Black
7 Receive Data (RXD) Green
8 Carrier Detect (DCD) Blue
LUM0020CD Rev June-2020 Page 97 of 112 Copyright © 2019FreeWave
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LRS455A-C, LRS455A-CE, LRS455-T
User-Reference Manual