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Pulse Generator Input Module for Control Simulation Testing

The Pulse Generator Unit MR8791 is a plug-and-play module for Hioki Memory HiCorders to conduct control simulation testing of control boards on equipment such as engine, airbags, brake systems, and power steering. Key Features • Output pulse waves, pattern waves up to 8 channels per unit (output signals of TTL level, or open-collector) • For use with Hioki Memory Hicorder series (cannot use with 8847 or MR8847) • Isolated between unit and output (Not isolated between each channel (common ground))

Model No. (Order Code)

MR8791 For the MR8847A and similar products

Use with Hioki Memory Hicorders. *Output cords are not included. Please purchase them seperately.


Basic specifications (Accuracy guaranteed for 1 year)

Output terminalNumber of channels: 8, Connector: D-sub, half-pitch, 50-pin
Max. rated voltage to ground: 33 V rms AC or 70 V DC (between unit and output channels)
Logic output/Open collector output
Output mode 1Pattern output: Read frequency: 0 Hz to 120 kHz, 2048 logic patterns
Pulse output: Frequency 0 Hz to 20 kHz, Duty 0.1% to 99.9%
Output mode 2Logic output: Output voltage level: 0 V to 5 V
(H level: 3.8 V or more, L level: 0.8 V or less)
Open collector output: Absolute maximum rated voltage for collector/emitter: 50 V
Overcurrent protection: 100 mA
OtherSelf-test function
Dimensions and mass106 mm (4.17 in) W × 19.8 mm (0.78 in) H × 196.5 mm (7.74 in) D, 230 g (8.1 oz)

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Seminar Videos On Demand

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Seminar Schedule

Registration Open

ECCE 2019 - Baltimore, Maryland

Sep 29, 2019 - Oct 3, 2019

Registration Open

Testing Expo China 2019 - Shanghai

Sep 24, 2019 - Sep 26, 2019


Catalog: Waveform Generator System U8793,MR8847A Download PDF  [2MB] English

User Guides

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If you can not download, log into your myHioki account to access more technical documents and information where available.

Instruction Manual English
Instruction Manual Japanese

Outline Drawings

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Declaration of Conformity

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Drivers, Firmware

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Output cable

* Please contact your local HIOKI distributor for connectors that support Model MR8791.

Use with these Products

*Cannot use with 8847 or MR8847

* Main products are listed below. For more information, please see each product page.


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• Multi-channel performance ideal for trial runs after the scheduled maintenance of railway cars to verify for voltage command signals, motor current, car speed, and brake pressure • Evaluate inverters and UPS • Transformer interruption testing

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• Operation testing and evaluation of inverters and UPS during load fluctuation and switching • Analyze the relationship between engine control and vibration during vibration testing • Identify power fluctuations when power supply is cycled

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