Overcurrent Protection - ero electronic ELK Manuel Utilisateur

Enclosure of Live Parts
To prevent hands or metal tools touching parts that may
be electrically live, the controller must be enclosed in
an enclosure
Caution: Live sensors
The controller is designed to operate if the temperature
sensor is connected directly to one cable of the power
line. However, you must ensure that service personnel
do not touch connections to these inputs and to all other
inputs/outputs not isolated from the measuring input
while they are live. With a live sensor, all cables,
connectors and switches for connecting the sensor must
be mains rated for use in 240Vac CATII.
Wiring
It is important to connect the controller in accordance
with the wiring data given in this guide. Take particular
care not to connect AC supplies to the low voltage
sensor input or other low level inputs and outputs. Only
use copper conductors for connections (except
thermocouple inputs) and ensure that the wiring of
installations comply with all local wiring regulations.
For example in the UK use the latest version of the IEE
wiring regulations, (BS7671). In the USA use NEC
Class 1 wiring methods.
50
Power Isolation
The installation must include a power isolating
switch or circuit breaker. This device should
be in close proximity to the controller, within
easy reach of the operator and marked as the
disconnecting device for the instrument

Overcurrent protection

The power supply to the system should be
fused appropriately to protect the cabling to the
units.
Voltage rating
The maximum continuous voltage applied
between any of the following terminals must
not exceed 240Vac:
•
relay output to logic, dc or sensor
connections;
•
any connection to ground.
The controller must not be wired to a three
phase supply with an unearthed star
connection. Under fault conditions such a
supply could rise above 240Vac with respect to
ground and the product would not be safe.
Part number HA028438. Issue 3.0.
.
Oct-05