Wire Replacement I/O (900 MHz): User Manual and Reference Guide
5.2 Wiring I/O Slaves
I/O Slaves replicate the states of the Digital Inputs and sensor power inputs of the I/O Master as
Digital Outputs.
l
The terminal block on the I/O Slave can accept a single wire up to 16 gauge.
l
Smaller wire is required for 2 wires, or wire and resistor connected into the same screw
terminal.
5.2.1 Radio Power
Power is available on screw terminal #11 (B+ In) of the I/O Slave terminal block or through Pin 1
on the 10 pin header connector.
Use either to power the I/O Slave. Pin 1 on the connector is the pin closest to the edge of the
board and Pin 10 is closest to the inside of the board.
5.2.2 Digital Inputs
Complete these steps when connecting the I/O Slave to a digital end device, such as a pressure
switch:
1. Connect the end device output wire to Digital Input 1 screw terminal # 1 or Digital Input 2
screw terminal # 2 on the terminal block of the I/O Slave.
2. Connect the ground wire from the end device to Ground screw terminal # 3, 9, or 12 on the
terminal block of the I/O Slave.
If the Ground wire is not returned to the radio, the potential difference between the radio’s
Ground and the end device Ground should not exceed 1 V.
3. If wiring a 3-wire digital transducer, set up similarly to the 1-5 V analog sensor, except
connect the signal wire to a Digital Input.
5.2.3 Digital Outputs
When connecting the I/O Slave to a digital end device, such as a solenoid valve:
l
Both Digital Outputs (screw terminal #4 and 5) are closed contact to ground.
l
The outputs connect to Ground when 0 (zero) volts is connected to the controlling I/O
Master Digital Input.
l
The current rating for a Digital Output is 2 amps or less.
l
The Digital Output self-protects if a current of more than 2.5 amps is drawn and
automatically retries at 0.16 second intervals.
l
If power on the end device is not driven from the same power supply as the I/O Slave, that
source must be equal to or less than the radio’s power supply voltage.
LUM0008AG Rev Sep-2015
Page 77 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: ......
