MR8740T_Quick guide_eng_20191016H.pdf - 第141页
135 Specications of the Options Specications of the pulse outputting Output frequency Setting range: 0 Hz to 20 kHz (congurable for 8 channels individually) Setting resolution: 0.1 Hz Frequency accuracy: Consistent wi…
134
Specications of the Options
Model MR8791 Pulse Generator Unit
General specications
Temperature
and humidity for
guaranteed accuracy
23°C±5°C (73°F±9°F), 80% RH or less (no condensation) (when installed in a Memory
HiCorder)
Guaranteed accuracy
period
1 year
Product warranty
period
3 years
Operating
temperature and
humidity
Consistent with the specications of Memory HiCorder in which Model MR8791 is installed.
Operating
environment
Consistent with the specications of 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 rms AC or 70 V DC (between each output channel and enclosure)
Anticipated transient
overvoltage
330 V
Withstanding voltage 350 V AC (sensitivity current: 1 mA) (between each output channel and enclosure,
between any two of output modules)
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 channels (isolated between each output channel and enclosure, and between any two
of input channels; not isolated between any two of output channels [cross-channel GND
terminal]; not isolated between output connector frame and instrument’s GND terminal)
Output mode 1 Pattern output / pulse output (8 channels are commonly switched)
Output mode 2
Logic output:
Open-collector output:
Logic output / open-collector output (congurable for 8 channels individually)
Output voltage level: 0 V to 5 V (High level: 3.8 V or more, low level: 0.8 V or less)
Rated current: ±5 mA
Absolute maximum rated voltage between collector and emitter: 50 V
Overcurrent protection: 100 mA
Output mode 3 Output / open (for self-diagnosis) (8 channels are commonly switched)
Open-collector
output specication
(rising time from 10%
to 90%)
5 µs (max.) (load capacity: 1000 pF, pull-up resistor: 1 k
Ω
)
Self-diagnosis
function
Detection voltage
High level: 3.4 V or more, low level: 1.6 V or less
Relay switching time 5 ms or less (switching between logic and open-collector, between output and open [self-
diagnosis])
Standards Safety: EN 61010
EMC: EN 61326 Class A
135
Specications of the Options
Specications of the pulse outputting
Output frequency Setting range: 0 Hz to 20 kHz (congurable for 8 channels individually)
Setting resolution: 0.1 Hz
Frequency accuracy: Consistent with the time-axis accuracy of Memory HiCorder in which
Model MR8791 is installed.
Duty ratio Setting range: 0.1% to 99.9%, 0, 100% (DC)
Setting resolution: 0.1%
Duty ratio accuracy: Consistent with the time-axis accuracy of Memory HiCorder in which
Model MR8791 is installed.
Minimum pulse width 1 μs
Specications of the pattern outputting
Clock frequency Range: 0 Hz to 120 kHz (common for 8 channels)
Setting resolution: 10 Hz
Frequency accuracy: Consistent with the time-axis accuracy of Memory HiCorder in which
Model MR8791 is installed.
Memory (pattern) 2,048 words (16,384 bits = 2,048 words × 8 bits/word)
5
Specications
136
Specications of the Options
Specications of the output connector
10250-52A2PL: 3M brand (SCSI-2 connector, Centronics half-pitch, 50 pins, female)
Pin Signal name Pin Signal name
1 I_GND: 26 I_GND:
2 CH1 27 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) 47 I_GND:
23 TEST3 (DIN02) 48 I_GND:
24 NC 49 I_GND:
25 NC 50 I_GND:
Frame F_GND:
CH1 through
CH8:
Pulse output
I_GND: Isolated ground
F_GND: Non-isolated ground (frame ground)
NC: Not connected
TESTn: Do not connect a test pin.
Recommended connection cable: Model KB-SHH2K Sanwa Supply brand (SCSI-2 connector, Centronics half-pitch,
50 pins, male)