ES4441.1 Compact Error Simulation Module with Breakout Frontpanel - User´s guide
47
ETAS
Hardware Features
4.3
Time Response
If you are using mechanical relays and have to determine how long an error has
to be active ((t
2
- t
1
) in the figure) until an entry is made in the error memory, the
finite activation time of the mechanical relays has to be taken into consideration.
In the following figure, this is the time (t
1
- t
0
), i.e. the time between the receipt
of the command and the actual closing of the relay.
Once the error is set, measuring this activation time is executed on a reference
relay and transferred to the host in the command response.
For errors which are switched by MOSFETs, this kind of measuring is not neces-
sary due to fast activation.
