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W i n d o w s
P C
S o f t w a r e
P A G E 4 0
4.7.2.2.1
Relay/TTL
The MAGIC EEC has eight GPIO Pins (TTL) which can be programmed in-
dividually. Furthermore, eight relays are also available.
The following description applies to all eight configuration windowsTTL 1
(Pin 1), TTL 2 (Pin 2), TTL 3 (Pin 3), TTL 4 (Pin 4), TTL 5 (Pin 5), TTL 6 (Pin
6), TTL 7 (Pin 7) and TTL 8 (Pin 8).
TTL Pin as Output
ATTENTION
Please note that the maximum switching current is 10 mA and the maximum
switching voltage is 3.3V per TTL output.
!
FIG. 12
If a TTL Pin is configured as an Output, the event is signalled when the volt-
age at the TTL Pin changes from 0V to +3.3V.
Under Positive edge you can select the following Function Codes:
– Fixed Low: The TTL Pin is fixed to 0V.
– Fixed High: The TTL Pin is fixed to +3.3V.
– Information Base Entry: Special function for projects
– System Alarm Pending: This function signals a pending system alarm
(see CHAPTER 4.9.1).
– Application Alarm Pending: This function signals a pending application
alarm. You can select up to three specific alarms or the options Any Clock
Alarm or Any input Alarm.
TTL PIN AS OUTPUT
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