HP 34907A Multifunction Module

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The HP 34907A allows great flexibility for a variety of sense and control applications. It combines two 8-bit ports of digital input and output, a 100 kHz gated totalizer, and two ±12V analog outputs- all on a single earth-referenced module. The digital inputs and totalizer input may be included in a scan. Alarm limits for the digital and event counter inputs are evaluated continuously, capturing and logging alarm conditions even between scans.

Digital Input/Ouput
Use the digital outputs with an external power supply to control microwave switches and attenuators, solenoids, power relays, indicators, and more. Use the digital inputs to sense limit switch and digital bus status. There are no complex handshake modes; reads and writes are initiated either from the front panel or the bus.

Totalize Input
Count events from devices like photo interrupters, limit switches, and Hall-effect sensors.
It keeps an updated total which can be read via the front panel or programmatically at any time. With 26 bits of resolution, it can count events at full speed for nearly 45 minutes without an overflow.

Analog Output
Use the two electronically calibrated analog outputs to source bias voltages to your device under test, to control your analog programmable power supplies, or use the outputs as setpoints for your control systems. The outputs are programmed directly in volts, either from the front panel or from the bus.


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Module Specifications

Up to three modules, in any
combination, can be inserted into a single mainframe. The HP 34970A's
internal DMM connections are accessible only through the HP
34901A, HP 34902A, and HP 34908A low-frequency multiplexers.
On-module screw terminals accept wire sizes from 16 gage to 22 gage.
20 gage wire is recommended for high channel count applications.







HP 34907A Multifunction 

Module






DIGITAL INPUT/OUTPUT







Port 1 and Port 2


8 bit, input or output, non-isolated






Vin(L)


<0.8V (TTL)






Vin(H)


>2.0V (TTL)






Vout(L)


<0.8V @ |out = -400 mA






Vout(H)


<2.4V @ |out = 1mA






Vout(H) max


<42V with external open drain pull-up






Alarming


Maskable pattern match or state change






Speed


4 ms (max) alarm sampling






Latency


5 ms (typical) to 34970A alarm output






Read/Write Speed


95/s






TOTALIZE INPUT







Maximum Count


226- 1






Totalize Input


100 kHz (max)
Rising or falling edge, programmable






Signal Level


1 Vp-p (min)

42 Vpk (max)






Threshold


0V or TTL, jumper selectable






Gate Input


TTL-Hi, TTL-Lo, or none






Count Reset


Manual or Read + Reset






Read Speed


85/s






ANALOG OUTPUT







DAC 1, 2


± 12V, non-isolated






Resolution


1 mV






|out


10 mA max






Settling Time


1 ms to 0.01% of output






Accuracy


±(% of output + mV)







    
1 year ±5°C




0.15% + 6 mV







    
90 day ±5°C




0.1% + 6 mV







    
24 hour ±1°C




0.04% + 4 mV






Temperature Coefficient


± (0.015% + 1 mV) / °C
















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HP 34907A       Multifunction Module



Related Modules
HP 34901A       20 Channel Multiplexer (2/4 -wire)
HP 34902A       16 Channel Multiplexer (2/4 -wire)
HP 34903A       20 Channel Actuator/GP Switch
HP 34904A       4 x 8 Matrix
HP 34905A       2 GHz Dual 1:4 RF Mux, 50 ohm
HP 34906A       2 GHz Dual 1:4 RF Mux, 75 ohm
HP 34908A       40 Channel Single-Ended Multiplexer




  


Available accessories for this product include:






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