MOL81 485 1312/MOL81 485 1337
MOL81 485 1312-MOL81 485 1337-UM-1.4-EN
5/20
2.2 Basic operation
After a reset or a power-up, the MOL81 is ready for use, no other setting up is necessary. When a valid tag is
detected, its identifier can be read with a MODBUS command.
Commands can be sent to the device at any time, for control and for special setups. These commands may be
acknowledged (ACK or NAK) and may receive a response. No asynchronous commands are sent by the
MOL81.
2.3 Power
The MOL81 is powered with 24Vdc, the voltage range acceptable for correct operation is 21Vdc to 29Vdc
(including any ripples). Typical current drawn at 24Vdc is 600mA, with a maximum of 1A. The power module is
protected against polarity inversions.
Any changes in settings are memorised, so that after a reset the same settings are used as before the previous
power-down. In particular, if the 125 kHz emitter was deactivated before power-down, it will still be deactivated
after power-up.
Conversely, if the 125 kHz emitter was activated after power-up, it will also be activated at the next power-up, if
no configuration changes have been made. In this case, the activation time for the 125 kHz emitter is roughly
250 ms.
