Below are some common questions related FreeWave Radio Wire Replacement configuration.

Q: Can I/O be used with a 1 Watt radio?

A: The FGRIO-M functions as a standard 900 MHz 1 Watt serial radio with a 60 mile line-of sight
range. The FGRIO-S functions as an FGR Short Range radio with a 2 mile line-of-sight range. The FGR2-IOS-C-U and FGR2-IOS-CE-U function as FGR2 radios with a 60 mile line-of sight range.

Q: Can the I/O radios be repeated through our other radios to extend the range?

A: From the I/O Slave to the I/O Master, you cannot use a Repeater. When the I/O Master is integrated into a standard serial network, you can use Repeaters between the I/O Master and the Serial Master as they already are in existing FreeWave networks. The I/O Master cannot function as a Slave/Repeater.

Q: Can the I/O Master operate as Slave/Repeater in the overall network?

A: The IO Master currently does not have the capability to operate as a Slave/Repeater. It does function as the Master to the I/O Slave, and as a MultiPoint Slave to the rest of the network.

Q: Can data be sent directly from the I/O Slave to the Master of the serial network?

A: No. The wire replacement system functions as wire replacement only. The IO Slave's serial ports are inactive and do not have the capability of transmitting data directly to the Master of a serial network.

Q: What timing issues does a wire replacement system introduce?

A: Although a wire replacement system mimics a wired connection, the electronics and communication heartbeat do cause some signal delay. The worst case delay for digital signals in either direction and in the Sensor Power command from I/O Master to IO Slave is 167 ms, assuming a robust link. Worst case delay from I/O Master Sensor Power assertion to I/O Master Analog Output refresh is 700 ms.

PDF Documents for the FGR IO Series of radios: