Connection And Commissioning; Handling; Power Supply; Fuse Replacement - Conrad Electronic 197720 Notice D'emploi

5. Connection and commissioning

a) Handling
Attention! The relay board consists of sensitive electronic components! Improper handling
may destroy them. Electrostatic discharge, induced voltage peaks and compensation currents
between different voltage potentials are especially damaging.
Prior to handling the board, touch a metal object (earthed), e.g. a metal PC casing. Only touch
the board at the edges. Do not touch any electronic components or strip conductors on the
board.
Prior to connecting or disconnecting connection cables, switch off the voltage
supply for the board as well as that of the devices connected or to be
connected.
b) Power supply
Connect the operating voltage (direct voltage) to the positions of the clamp "UB" marked with
"+" and "-". This may be between 12V/DC and 24V/DC. Observe the polarity (plus/+ and
minus/-).
Current consumption:
• Item no. 197720:
max. 300mA at 12V/DC, max. 200mA at 24V/DC (all 8 relays switched on)
• Item no. 197730:
max. 400mA at 12V/DC, max. 250mA at 24V/DC (all 8 relays switched on)
c) Fuse replacement
The relay board is secured with a fuse (1A, slow-blow) at the voltage supply input (clamp UB).
If the input is overloaded, the fuse triggers. Operation of the relay board is then no longer
possible. In this case, disconnect the connection to the voltage supply. You can then replace
the broken fuse with a new one of the same type and nominal voltage. You must not bypass
the fuse holder.
Type of fuse: Standard fine-wire fuse (5x20mm), 1A, 250V, slow-blow
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