I/O Connector
External Event Out
Levels
TTL compatible; 0 V < Low < 0.6 V; 2 V < High < 5 V
Function
Alarm or Recording Active output; software selectable
Active level
High/Low for Alarm output; software selectable
Recording active High output
Pulse width
Alarm: Active from start of alarm condition until condition ends
Recording: Active until recording stops
Maximum output current
50 mA, short circuit protected
Output impedance
49.9 Ω
±
1%
Short circuit protected
Continuous
Delay
(1)
515
±
1 μs + up to one sample period when Clock base: decimal, Filter: wideband
(2)
503
±
1 μs + up to one sample period when Clock base: binary, Filter: wideband
(2)
External Start In
Levels
TTL compatible, Low
-
30 V to 0.7 V, High 2 V to 30 V
Input has an internal pull
-
up of 20 kΩ
±
1% to 5 V
Input overvoltage protection
±
30 V DC
Minimum Pulse width
200 ns
Active edge
Rising/falling edge; software selectable
Start response time
Typically 1 s when system is completely idle
External Stop In
Levels
TTL compatible, Low
-
30 V to 0.7 V, High 2 V to 30 V
Input has an internal pull
-
up of 20 kΩ
±
1% to 5 V
Input overvoltage protection
±
30 V DC
Minimum Pulse width
200 ns
Active edge
Rising/falling edge; software selectable
Stop response time
Typically 1 s when system is recording without automation
(1)
Delays are equal for all acquisition cards.
(2)
If an analog and/or digital filter is used, extra delay will be added, depending on the type of filter and signal frequency.
Digital Event/Timer/Counter
Analog
Acquisition
card
Acquisition
card
Slot
A
Slot B
Analog
Digital
Digital
Digital Event/
Timer/Counter
Connector
Backplane
Figure A.8:
Digital Event/Timer/Counter block diagram
Supported cards
See specifications of acquisition cards
Number of connectors
1
Connector type
44 pin, female D
-
type connector, AMP HD
-
22 series (Tyco/TE connectivity: 5748482
-
5)
Mating cable connector type
44 pin, male D
-
type connector, HDP
-
22 series (Tyco/TE connectivity: 1658680
-
1)
Output power
Voltage
5
±
0.5 V DC
Maximum current
0.5 A
GEN3i
374
I3763-3.1 en HBM: public
