ES4441.1 Compact Error Simulation Module with Breakout Frontpanel - User´s guide
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Hardware Features
ETAS
4.7
Master/Slave Operation of Several ES4441.1 Systems
An ES4441.1 Compact Error Simulation Module has 255 error simulation chan-
nels. If this number is not sufficient, up to 15 slave systems can be connected to
a master system.
For this purpose, the lines of the error rails 1 and 2 (two green screw pads on the
rear of the device) must be connected to the error rails 1 and 2 of the slave
systems.
Multiple errors in an ES4441.1 are always switched simultaneously – in addition,
the synchronization of all systems used in master/slave operation also ensures the
simultaneous switching of the errors on all systems.
The synchronisation is realized via signals that are distributed from a master sys-
tem to slave systems over the “Trigger“ connector (see chapter 6.6 on page 63).
4.8
External Triggering of the ES4441.1
It is possible to activate an error of the ES4441.1 Compact Error Simulation
Module via external triggering. The Trigger input is TTL compliant and has a gal-
vanic separation. It is possible to select trigger edge (rise or fall) and trigger level.
The trigger signal is distributed from an external trigger source to the ES4441.1
Compact Error Simulation Module over the “Trigger“ connector (see chapter 6.6
on page 63).
4.9
IP Addresses
If you are operating one or more ES4441.1 Compact Error Simulation Modules
with the operating software PINCONTROL provided, you can assign (freely selec-
table) IP addresses for the individual modules there.
4.10
Safety Concept
The ES4441.1 Compact Error Simulation Module has protective mechanisms
against excess temperature and overcurrents.
4.10.1
Resetting on Excess Temperature
When in operation, the temperature of the ES4441.1 Compact Error Simulation
Module is monitored at various points in the housing. If an excess temperature is
detected at any one of these points, a reset is executed which is indicated via the
yellow ”Reset” LED on the front panel (see Abb. 4-2 on page 49).
All relays are reset during a reset, i.e. all errors set are cancelled. Set errors are
not executed and acknowledged with an error message as long as the excess
temperature condition applies.
4.10.2
Protecting the Rails and the Ground Channel Resistor Cascade
The over current protection of the ES4441 is realised by current measurement in
each of the two rails and in the ground channel (340). If the current through one
or both rails and in the ground channel exceeds the range for more than 100
μ
s,
all MOSFETs and relays are switched off.
In each case, the limit for the rail current depends on the selected channel with
the lowest maximum current (1.2x the lowest maximum current is set as current
limit). It is possible to set a lower current limit manually.
If the error is simulated on the low current path, the current limit will be initially
