技术资料.pdf - 第30页
30 34952A Multifunction Module with 32 - bit DIO, 2- Channel D/A and Totalizer The mult ifunctio n module offers the flexi bility yo u need for sys tem control. T he 34 952A has f our 8 - bit digital I/O chann els, a 10 …
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Trigger output
Level
TTL compatible into 1 kΩ (3.3 V logic)
Output impedance
50 Ω typical
Clock input
Input level
TTL compatible into 1 kΩ (3.3 V logic)
Input impedance
50 Ω typical
Maximum rate
10 MHz
Clock output
Level
TTL compatible into 1 kΩ (3.3 V logic)
Output impedance
50 Ω typical
Maximum rate
10 MHz
Accuracy
± 100 ppm
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34952A Multifunction Module with 32-bit DIO,
2-Channel D/A and Totalizer
The multifunction module offers the flexibility you need for system control. The 34952A has four 8-bit
digital I/O channels, a 100 kHz gated totalizer, and two ± 12 V analog outputs—all on a single earth-
referenced module. The digital inputs and totalizer input may be included in a scan list. Alarm limits for
the digital and totalizer inputs are evaluated continuously, capturing and logging alarm conditions even
between scans. Connections can be made via standard 50-pin Dsub cables or detachable terminal
blocks. The 34952T terminal block has a pinout for connection to an external Opto 22 board.
34952A multifunction module
Digital input/output characteristics
Channels
Four 8-bit channels, 8 bits wide, input or output, non–isolated
Vin(L)
< 0.8 V (TTL)
Vin(H)
> 2.0 V (TTL)
Vout(L)
< 0.8 V @ Iout = -400 mA per output
Vout(H)
> 2.4 V @ Iout = 1 mA
Vin(H) max
< 42 VDC with external open drain pull-up
Alarm
Maskable pattern match or state change
Speed
4 ms (max) alarm sampling
Latency
5 ms (typical) to 34980A alarm output
Read/write speed
95/s
Totalize input characteristics
Max count
2
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-1
Totalize input
100 kHz (max) rising or falling edge, programmable
Signal level
1 Vp-p (min) 42 Vpk (max)
Threshold
0 V or TTL
Gate input
TTL-Hi, TTL-Lo, or none
Count reset
Manual or read + reset
Read speed
85 rds/s
Analog output characteristics
DAC 1,2
± 12 V, non-isolated
Resolution
1 mV
IOUT
10 mA max
Settling time
1 ms to 0.01% of output
Accuracy
1 year
± (% of output + mV)
(0.25% + 20 mV)
Temp. coefficient
± (0.015% + 1 mV)/
o
C
