KTA-296 Wireless I/O Extender
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Quick Start Guide
The KTA-296 pair has been pre-configured in the factory with default settings. It is
recommended to leave the unit at default unless changes are necessary.
Default:
Poll time: 10s
Tx Power: 30dBm
Air Speed: 16
Ensure that antennas are plugged into the radio of each KTA-296. Apply power (24V DC).
Allow 5 minutes for the radios to detect each other and establish a link. The status LED can
be monitored for this purpose; if flashing, there are no communications, if solidly on, the
link is established and the KTA-296 is ready for operation. An open collector style digital
output is available at AI3 to indicate if the link is good.
Each radio also has a transmit and receive LED. These can be monitored to view traffic on
the wireless link and establish if the radios have found each other. See below for comms
details.
Device Overview
The KTA-296 operates as a pair. Packets are sent over the radio link to update each device
as inputs change. A change on the state of a digital input will trigger a packet to be
sent. A change in an analog input of more than 4% will trigger a packet to be sent.
Even if there is no change on the inputs, a packet will be sent as frequently as the “poll
time” to ensure that both devices remain in sync.
Should a device send a packet but not receive a response, it will try sending the packet up
to another 3 times. If there is still no response, the device times out and shows “comms
down” on the status LED.
To prevent radio traffic from becoming excessive, there is a minimum period that the radios
must wait before transmitting on the link. This period is random between 1 and 5 seconds,
and is changed after every packet is transmitted.
