
Wire Replacement I/O (900 MHz): User Manual and Reference Guide
Procedure
1. If using a board-level I/O Slave, place the resistor between the Analog Input (terminal #8 or
#10) and the Ground screw terminal (terminal #6, #9 or #12) of the I/O Slave.
Note
: The resistor produces a 1-5 V signal across it when 4-20 mA flows throw it.
If using an FGR2-IOS-CE-U (ruggedized enclosure), a resistor exists within the radio to enable
or disable. This resistor takes the place of an inline resistor.
Figure 13: Example: 249 Ω Resistor
2. Enable the resistor between the 4-20 mA sensor and the analog input using the
AI1
250 Ohms
or
AI2 250 Ohms
parameter in the
Wire Replacement
tab in
Tool Suite
.
Note
: The internal resistor powers on after the radio powers on and boots up.
Important!
: Verify the correct radio voltage is supplied.
3. Connect the Sensor Power Supply (High) wire to VSNS screw terminal #7 on the terminal
block of the I/O Slave.
4. Connect the Sensor Output (Low) wire to the same Analog Input (terminal #8 or #10) as the
resistor on the terminal block of the I/O Slave.
This diagram illustrates a board-level wiring installation.
LUM0008AG Rev Sep-2015
Page 79 of 131
This document is the property of FreeWave Technologies, Inc. and contains proprietary information owned by
FreeWave®. This document cannot be reproduced in whole or in part by any means without written permission from
FreeWave Technologies, Inc.
Summary of Contents for FGR2-IO-IOE
Page 131: ......