2.3 Operating Mode
Each RCM 255 can operate as either a Push Button Switch receiver (by LEARNING EnOcean
PTM Switches) or a Magnet Contact Receiver (by LEARNING EnOcean STM 250 magnet
contacts), but not a mix of devices. The RCM 255 can LEARN either a maximum of 30
EnOcean PTM’s or up to 2 EnOcean STM 250’s. The memory of the receiver is empty when
delivered. By assigning the first transmitter the operating mode (push button switch or
magnet contact) is defined. The operating mode can only be changed after deleting all learned
transmitters with the CLR button.
a) Mode ROCKER SWITCH
: Each assigned transmitter can be used to change the switching
state of the receiver. It is possible to switch ON (button I) with one switch and to switch OFF
(button O) with another switch. When learning a radio switch with 2-rockers, only the rocker
which has been pressed is learned by the receiver.
Initialization:
After Power-up and Learning Phase the relays output is open (“off”). At
least one of the learned radio switches have to be operated to switch the output.
b) Mode WINDOW CONTACT
: If at least one of the assigned window contacts is open the
switching state of the receiver is ON. If both contacts are closed the state is OFF.
Time Out:
If at least one of the assigned window contacts is open, the switching state
of the receiver is ON. If both contacts are closed the state is OFF. The window contacts
transmit a ‘supervisory signal’ typically every 15 min (5…30 min). If there has been no
supervisory signal for more than 60 (± 10%) minutes, the RCM 255 considers the
contact closed.
Potential reasons the supervisory signal is not received include: The energy store of the
window contact is empty, make sure the solar cell receives sufficient light, the radio
channel is disturbed by interference or obstructions, the window contact has been
removed, or the contact is broken
Initialization:
After Power-up and Learning Phase the module output OUT_0 is
inactive (“off”). At least one of the learned magnet contacts have to be opened to
release the output immediately (before first incoming presence signal).
2.4 Learning of Radio Transmitters
1.) For programming the RCM255 must be connected to power. The programming is
retained when power is disconnected. To prevent LEARNING unintentional switches,
when in Programming mode, the receiver sensitivity is reduced to approximately 5
meters from the switch.
2.) Operating the LRN or CLR pushbutton should be done by pushing a non-metallic
insulated probe (e.g. plastic ballpoint pen) carefully through the small hole in the
housing onto the pushbutton behind.
3.) Press and hold the LRN button approximately 0.3 seconds until Programming mode
activates which is confirmed by 1 second cyclic switching of the output relays
(“Toggling”): A light connected to the power output will be switched on and off every
second. In quiet environments the Toggling of the relay can be heard.
©EnOcean GmbH, A. Anders
Page 11 of 18
RCM 255 User Manual V1.12
