The IEC62055-41 specification allows for various token carrier types to be used in conjunction with payment meters. These are shown below.

This is a magnetic card as defined in IEC62055-51.

This token carrier type is normally associated with a keypad on the payment meter and is defined in IEC62055-51.

This token carrier type is a direct connection to the payment meter and is defined in IEC62055-52.

This token carrier type is a remote connection to the payment meter supporting the DLMS_COSEM electricity metering data exchange suite of standards. [IEC62056-5-3, 62056-6-2, 62056-6-1]