80 The control unit
SDHC memory card slot (SD CARD)
Battery
The terminals of the control unit fulfill the Protective Extra Low Voltage (PELV) requirements. The PELV
requirements of a relay output are not fulfilled if a voltage higher than 48 V is connected to the relay
output.
Memory card type: SDHC
Maximum memory size: 4 GB
Real-time clock battery type: BR2032