14 Device Description
787-1668/0000-0080 Electronic Circuit Breaker
Manual
Version 1.1.0, valid from firmware 2.4.0
3
Device Description
The 787-1668/0000-0080 electronic circuit breaker reliably protects up to 8 load
circuits against short circuiting and overloading. The 24 VDC input voltage
applied to 8 output channels, each of which can be provided with separate fuse
protection:
Table 3: Channel Fuse Protection
Version
Fuse Protection per Channel
787-1668/0000-0080
1 A, 2 A, 3 A, 4 A, 6 A, 8 A, 10 A
The electronics can accommodate brief current peaks.
The IO-Link interface can be used to set all listed trip currents. The device also
has 8 rotary switches which can be used to set 5 different trip currents.
The actual status of the output channel is indicated by a multi-colored LED.
In the event of a short circuit or overloading, the individual channel is de-
energized after a defined trip time.
Wait for temperature to return to normal!
If a channel has been de-activated due to short-circuiting or overloading, wait
until the temperature returns to its normal range (cooling period) before re-
activating the channel.
The terms “switched ON” and “switched OFF”, as well as “tripped” are used in
this manual. To clearly delineate these terms, they are explained as follows:
Table 4: Definition of Terms
Designation
Definition
Switched ON
The user has activated the electronic circuit breaker
manually from the button or by a corresponding
interface command. The load circuit is closed, the
current flows.
Switched OFF
The user has deactivated the electronic circuit
breaker manually from the button or by a
corresponding interface command. The load circuit
is open, the current flow is interrupted.
Tripped
The electronics of the electronic circuit breaker have
been tripped due to overcurrent, undervoltage or
overvoltage. The load circuit is open, the current
flow is interrupted.
