MR8740、MR8741_user_manual_eng_20191016H.pdf - 第382页

17.6 Specifications of Modules 370 10250-52A2PL: Sumitomo 3M products (SCSI-2 con nec tor), (Centronics half-pitch 50 pins socket- contact) Recommended connection cable: KB-SHH2: Sa n wa Supply (SCSI-2 connector) (Centro…

17.6 Specifications of Modules

369

Chapter 17 Specifications

General Specifications

Pulse Output Specifications

Pattern Output Specifications

17.6.14 MR8791 Pulse Generator Unit

Temperature and humidity for

guaranteed accuracy

23°C±5°C (73°F±9°F), 80% RH or less (no condensation) (When installed in the Memory

HiCorder)

Guaranteed accuracy period 1 year

Product warranty period 3 years

Operating temperature and

humidity

As per Memory HiCorder in which Model MR8791 is installed

Operating environment As per Memory HiCorder in which Model MR8791 is installed

Storage temperature and

humidity

-20°C to 50°C (-4°F to 122°F), 90% RH or less (no condensation)

Maximum rated voltage to

earth

33 V AC rms or 70 V DC (between output channels and enclosure)

Anticipated transient overvoltage: 330 V

Dimensions Approx. 106W ×19.8H × 196.5D mm (4.17”W × 0.78”H × 7.74”D) (excluding protrusions)

Mass Approx. 230 g (8.1 oz.)

Number of output channels 8 (output channels and enclosure isolated; output units isolated)

(channels not isolated from each other [common GND]) (channels not isolated from output

connector frame [common GND])

Output mode 1 Pattern output/pulse output (switched for all 8 channels at once)

Output mode 2

Logic output:

Open collector Output:

Logic output/open-collector output (set separately for each of 8 channels)

Output voltage level: 0 V to 5 V (high level 3.8 V or greater, low level 0.8 V or less)

Rated current: ±5 mA

Collector/emitter absolute maximum rated voltage: 50 V

Over-current protection: 100 mA

Output mode 3 Output/open (= self-test) (switched for all 8 channels at once)

Open-collector output defini-

tion

(rising time [10% to 90%])

5 s (max.) (load capacity of 1000 pF, pull-up resistance of 1 k)

Self-test function Detected voltages: High level 3.4 V or greater, low level 1.6 V or less

Relay switching time 5 ms or less (logic/open collector switching, output/open [self-test] switching)

Standards Safety EN61010

EMC EN61326 Class A

Output frequency Setting range: 0 Hz to 20 kHz (set separately for each of 8 channels)

Setting resolution: 0.1 Hz

Frequency accuracy: ±100 ppm

Duty ratio Setting range: 0.1% to 99.9%, 0, 100% (DC)

Setting resolution: 0.1%

Duty ratio accuracy: {±100 ppm (setting period) ±150 ns} of setting

Priority to the “Minimum pulse width”and “Open collector output regula-

tion” specifications

Minimum pulse width 1 s

Clock frequency Range: 0 Hz to 120 kHz (Common for 8 channels)

Setting resolution: 10 Hz

Frequency accuracy: ±100 ppm of setting

Memory (Pattern) 2,048 words (16,384 bits = 2,048 words × 8 bits/word)

17.6 Specifications of Modules

370

10250-52A2PL: Sumitomo 3M products (SCSI-2 connector), (Centronics half-pitch 50 pins socket-

contact)

Recommended connection cable: KB-SHH2: Sanwa Supply (SCSI-2 connector) (Centron-

ics half 50-pin male)

Output Connector Specifications

Pin Signal name Pin Signal name

1 I_GND 26 I_GND

2 CH1 7 I_GND

3 CH2 28 I_GND

4 CH3 29 I_GND

5 CH4 30 I_GND

6 I_GND 31 I_GND

7 CH5 32 I_GND

8 CH6 33 I_GND

9 CH7 34 I_GND

10 CH8 35 I_GND

11 I_GND 36 I_GND

12 NC 37 I_GND

13 NC 38 I_GND

14 NC 39 I_GND

15 NC 40 I_GND

16 I_GND 41 I_GND

17 NC 42 I_GND

18 NC 43 I_GND

19 NC 44 I_GND

20 NC 45 I_GND

21 I_GND 46 I_GND

22 TEST2 (DIN03)I 47 I_GND

23 TEST3 (DIN02) 48 I_GND

24 NC 49 I_GND

25 NC 50 I_GND

Frame F_GND

CH1 to CH8: Pulse output

I_GND: Isolation GND (insulated GND)

F_GND: Non-Isolation GND (main instrument GND)

NC: No Connect

TESTn: Test pin DO NOT CONNECT

371

Chapter 18 Maintenance and Service

Transporting

Pack the instrument so that it will not sustain damage during shipping, and

include a description of existing damage. We cannot accept responsibility for

damage incurred during shipping.

Use the original packing materials when transporting the instrument, if possible.

Replaceable Parts

Certain parts require replacement periodically and at the end of their useful life:

(Useful life depends on the operating environment and frequency of use. Opera-

tion cannot be guaranteed beyond the following periods)

The fuse is housed in the power unit of the instrument. If the power does not turn

on, the fuse may be blown. If this occurs, a replacement or repair cannot be per-

formed by customers. Please contact your dealer or Hioki representative.

Maintenance and

Service Chapter 18

To avoid damage to the instrument, remove the USB memory stick before ship-

ping the instrument.

Part Life

Fan Motor

Approx. 60,000 hours

Power Source

Approx. 50,000 hours

Electrolytic

Capacitors

Approx. 45,000 hours

(The useful life of electrolytic capacitors varies greatly accord-

ing to the operating environment. In severe operating environ-

ments (40°C ambient temperature), degradation occurs in

about four years, so they should be replaced periodically.)

Lithium Battery

Approx. 10 years

This instrument contains a built-in lithium battery to back up

settings and the real-time clock. Have the battery replaced if

the date and time are found to lag substantially or if settings

are not retained when power is turned off and back on. Con-

tact your dealer or Hioki representative.