User's Manual

USER MANUAL

PTM 210 / PTM 215 / PTM 215U / PTM 215J

DC Step code and later

3 OPERATING MODES

This chapter describes the standard “out of the box” behaviour of PTM 21x devices. This

standard behaviour e.g. mode selection or secure teach-in telegram transmission can be

altered by the NFC Interface. Please refer to the chapter 5.4 for details.

PTM 21x devices support two operating modes:

 Normal mode

 Secure mode, this mode has two additional sub options

o Implicit RLC (legacy, not recommended)

o Explicit RLC (recommended)

In production the PTM 21x is set into “normal mode” operation. This is therefore the “out of

the box” behaviour of PTM 21x devices.

3.1 Normal Mode Operation

In normal mode, PTM 21x transmits telegrams in the EEP profile respectively defined by ERP1

or ERP2. Please refer to Chapter 2.3. for details.

In Normal mode, transmission of PTM 21x modules is secured by the secure concept includes

unique transmitter IDs. This means EnOcean products cannot be configured to transmit with

identical transmitter ID except for the special case of Base IDs.

3.2 Secure Mode Operation

While operating in secure mode, the PTM 21x sends secure telegrams in accordance to

EEP D2-03-00. Please refer to Chapter 2.3. for details.

In secure mode, the PTM modules use advanced security protection with data encryption and

message authentication. These mechanisms offer effective protection against a series of dif-

ferent attacks. One of the most concerning are Eavesdropping and Replay attacks.

Eavesdropping means somebody can receive and interpret the data correctly. Replay attacks

means an intruder receives and records the message to be retransmitted (replayed) later in

order to trigger an action.

An illustration of these attack scenarios are shown in the figure below.