DS620-3 Jan ‘07

©2007 Reg. No. 227 4001, ENGLAND

Page 5

RF620T

RF620R

SmartRadio Transmitter / Receiver

Operating mode

The status of the RF620T’s two logic level telemetry inputs will be mirrored on the two telemetry

outputs on the RF620R.

The input states are transmitted:

•

At power up

•

Every 2 seconds

•

After any change of state

Learn/erase procedure

In systems where only one pair of RF600T and RF600R modules is used, no learn is necessary.

In the event that more than one RF600T is in range of an RF600R then the RF620R will receive

transmissions from all in-range RF620T modules, controlling its telemetry channels in response to

all received data packets. In this case it will normally be necessary for each RF600R to learn the

identity of a single RF600T and this can be carried out in the following manner.

RF620T: the learn button is pressed, the learn LED will come on and remain on when the button

is released. The unit will transmit a learn packet and the LED will be turned off. After 5 seconds

another learn packet will be transmitted and the LED will be turned on. Every 5 seconds there-

after a learn packet will be transmitted and the LED state reversed and this will continue until 20

learn packets have been transmitted.

RF620R: the learn button is pressed, the learn LED will come on and remain on when the button

is released. When a learn packet from an RF620T is received, the RF620T address will be saved

to eeprom in the RF620R and the LED will flash 5 times to indicate that the learn has been

successful. The mode will terminate after 60 seconds if no learn packet is received.

If it is required to erase the learned address in the RF620R then the learn button should be

pressed and held for more than 8 seconds and then released after which time the LED will flash

rapidly to indicate that erase of the address has taken place. Note that in this state the RF620R

will respond to any RF600T.