PMC-2 Instruction Manual
Page 22 BA * PMC-2 * EN * 01/98
3.4 Assembly and handling
There is a risk of injuries by squeezing, shearing, cutting or hitting!
Observe rules for the prevention of accidents!
3.5 Safely separated extra-low voltages
Signal voltage and control voltage are <33 Volt and must be executed as extra-low voltages with safe
separation. When building in the PMC-2 it must be ensured that the existing safe separation is
retained throughout the complete power circuit.
CAUTION
Wrong connection can result in high electric tensions!
Watch the norms!
(draft DIN EN 50178/ed. 11.94, section 5.3.1.2)
3.6 Protection against touching electrical parts
Touching parts with tensions higher than 50 Volt can be dangerous for persons. The operation of
electrical appliances necessarily implies that certain parts of these appliances carry a dangerous
voltage.
CAUTION
Touching voltage-carrying parts - even after disconnection from the
mains supply - is a life hazard!
Wait for more than one minute after switch-off (due to the built-in condensers)
before accessing the appliances.
After removing the casing or cover or after opening the system cupboard,
certain parts of these appliances / systems, which can carry a dangerous
voltage, become accessible.
• After installation, check the firm connection of the earth conductor at all electrical appliances
according to the connection plan.
• Operation is permitted only with firm connection of the earth conductor at all electrical
components. Otherwise high voltages can occur on the casing.
• Before accessing electrical parts with tensions higher than 50 Volt, disconnect the device from the
mains supply or the voltage source. Secure against switch-on. Where appropriate, check residual
current in the DC-circuit (clamps DC+ and DC-) with voltmeter!
• Do not touch electrical connections of the components when switched on!
• Before switching on the appliance, safely cover up tension-carrying parts to avoid touching.
• Provide for protection against indirect touching (according to draft DIN EN 50178/ed. 11.94,
section 5.3.2).
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