YSI DIQ/S 182-MOD System 182 - Manual (Page 52)

Installation System 182
3 - 38 ba76025e01 02/2012
3.9 Connections to the relay outputs
3.9.1 General installation instructions
Warning
If external electrical circuits that are subject to the danger of
physical contact are incorrectly connected to the relay contacts,
there may be a danger of life threatening electric shock. Electrical
circuits are regarded to be subject to the danger of physical
contact when there are voltages higher than the Safety Extra Low
Voltage (SELV).
Pay attention to the following points during installation:
 Electrical circuits subject to the danger of physical contact
must only be connected by a qualified electrician.
 Electrical circuits subject to the danger of physical contact
must only be connected when they are voltage-free.
 If electrical circuits subject to the danger of physical contact
are switched with a relay, no circuit that is not subject to this
danger (e. g. the DIQ/CHV module) may be operated on the
further relays.
 Switching voltages and switching currents on the relay
contacts must not exceed the values specified in
chapter 10 T
ECHNICAL DATA . Protect electrical circuits against
currents that are too high with an electrical fuse.
 Only single-phase consumers can be switched with the relays.
Under no circumstances must multiphase consumers be
switched with the aid of several relays (example three-phase
current driven pumps). Always switch multiphase consumers
via a protective relay.
 After the Universal Transmitter has been installed, it may only
be opened if all external voltages have been switched off
beforehand.
Materials required  Wire end sleeves, suitable for the connecting wires, with suitable
crimping tool
 4 x screwed cable gland with sealing ring (scope of delivery of the
Universal Transmitter).
Tools  Cable stripping knife
 Wire stripper
 Phillips screwdriver
 Small screwdriver