ICRM-‐915-‐SER User’s Guide
V2.0 -‐May 2015
www.aarcomm.com
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Front Panel Description
Label
Description
ANT
RF antenna (SMA)
POWER
Power indicator
TX
Transmit data indicator
RX
Receive data indicator
LINK
Link status
RS-‐232
RS-‐232 mode.
Firmware 2.01s and later:
Light will briefly flash off when outputting data. Light
will flash steadily if hardware flow control is turned on and connected device is preventing the
ICRM from outputting serial data.
RS-‐485
Indicates RS-‐485 or RS-‐422 mode.
Firmware 2.01s and later:
Light will briefly flash when
outputting data to the port.
STATUS
System status
CONFIG
USB configuration/console port
RFLINK
Relay pin 1. When an RF link is active, these two pins are electrically connected
RFLINK
Relay pin 2
POWER +
Positive Power supply
POWER -‐
Ground
RSSI +
Receive signal strength analog voltage output (positive output)
RSSI -‐
Ground
RDo
Output. RS-‐232 receive to be connected to DTE’s (external device) receive line
TDi
Input. RS-‐232 transmit to be connected to DTE’s (external device) transmit line
RTSi
Optional Input – Request to Send. May be connected to DTE’s RTS to limit ICRM’s output flow
CTSo
Output. RS-‐232 Clear to Send. Connect to DTE’s CTS line to ensure data is not lost from exceeding
the ICRM’s input buffer.
TXD +
RS-‐485/RS-‐422 positive output. Connect to RXD+ in half-‐duplex mode.
TXD -‐
RS-‐485/RS-‐422 negative output. Connect to RXD-‐ in half-‐duplex mode.
RXD +
RS-‐485/RS-‐422 positive input. Connect to TXD+ in half-‐duplex mode.
RXD -‐
RS-‐485/RS-‐422 negative input. Connect to TXD-‐ in half-‐duplex mode.
