Wire Replacement I/O (900 MHz): User Manual and Reference Guide
Note
: If using an FGR2-IOS-CE-U, ensure the
AI1 250 Ohms
and
AI2 250 Ohms
settings in
the Wire Replacement tab in Tool Suite are disabled. The internal resistor is not required when
connecting to a 1-5 V sensor.
Use a 3-wire connection to connect a 1-5 V sensor to either Analog Input 1 or Analog Input 2 on
the I/O Slave.
1. Connect the sensor's Ground wire to Ground screw terminal #3, 9, or 12 on the terminal
block of the I/O Slave.
2. Connect the sensor's Power wire to the VSNS screw terminal #7 on the terminal block of
the I/O Slave. Rated total current draw from VSNS is 40 mA or less.
3. Connect the senor's output wire to Analog Input 1 or Analog Input 2 screw terminal #8 and
#10.
Connecting 1-5 Volt Sensor to Analog Input 3 or Analog Input 4
l
The Digital Inputs on the Modbus I/O Slave may be digitized to 10-bit resolution and
mapped to Analog Outputs on the I/O Master.
l
This mapping allows up to four analog transducers to be connected to a single remote I/O
Slave.
Note
: In the FGRIO-S radio, this feature requires firmware version of 2.65IO or higher.
l
The Analog Inputs formed from the Digital Inputs at screw terminal #1 and screw terminal
#2 are directly usable with signals only from 0.1 V to 2.812 V. Input loading can be selected
as 10 KΩ to GND or unloaded (>1 MΩ).
l
The DI accuracy is /-.25% and resolution is 10-bits.
1-5 Volt Sensor Signal Coupling for Analog Input 3 and Analog Input 4
For the Analog Input 3 and Analog Input 4:
l
Input Resistor
- The I/O Slave Digital Inputs provide an internal 10 KΩ resistor pull-up to
the radio’s 3.3 V logic supply.
l
With firmware 2.25IO and later, the resistor can also be commanded to pull down to GND
or “float” unconnected.
l
See
DI1 Pullup and DI2 Pullup (on page 54)
These options are useful for Analog Input connections.
l
Signal Level Reduction
- Digital Inputs #3 and #4 do not have sufficient voltage range for
direct connection to typical transducer outputs, so the input must be restricted.
LUM0008AG Rev Sep-2015
Page 83 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.
Содержание FGR2-IO-IOE
Страница 131: ......