MR8740T_Quick guide_eng_20191016H.pdf - 第60页
54 Connecting the External Control T erminals T erminal block No. Pin name Operation 1 GND – 2 IN1 Starts/stops measurement, saves data les, aborts measurement, enters events 3 IN2 4 GND – 5 OUT1 Outputs signals indicat…
53
Connecting the External Control Terminals
2.3 Connecting the External Control Terminals
This section describes the procedure and the external control terminal function to externally
control the instrument. Connecting the external control terminals with external devices allows the
instrument to start and stop measurement.
The term “external control terminals” is used to refer to all of these terminals collectively.
Refer to “Before connecting the instrument to external equipment” (p. 19).
Model MR8740T
External device
Wires to be connected
Recommended wire Solid wire: 0.65 mm in diameter (AWG22)
Stranded wire: 0.32 mm
2
(AWG22)
Acceptable wire Solid wire: 0.32 mm to 0.65 mm in diameter
(AWG28 to AWG22)
Stranded wire: 0.08 mm
2
to 0.32 mm
2
(AWG28 to AWG22)
Strand diameter: 0.12 mm or more (per wire)
Stripped length 9 mm to 10 mm
Button pressing tool Flat-blade screwdriver
(shaft diameter: 3 mm, tip width: 2.6 mm)
Solid wire
Stranded wire
10 mm
How to connect wires
Rear side
1
2
3
1
Depress the terminal button
using a tool, such as a at-blade
screwdriver.
2
Insert the wire into the wire
connection hole while depressing
the button.
3
Release the button.
The wire is locked.
2
Preparing for Measurement
54
Connecting the External Control Terminals
Terminal block
No. Pin name Operation
1 GND –
2 IN1
Starts/stops measurement, saves data les, aborts
measurement, enters events
3 IN2
4 GND –
5 OUT1
Outputs signals indicating judgments and status (error,
busy, waiting for a trigger)
6 OUT2
7 GND –
8 EXT.TRIG
The instrument is triggered when an external signal is
inputted as a trigger source.
9 TRIG.OUT Outputs a signal when the instrument is triggered.
10 GND –
11 EXT.SMPL Input a external sampling signal.
How to congure the external control terminal settings
On the [External terminal] screen, you can congure the following terminal: the external input (IN1,
IN2), external output (OUT1, OUT2), and trigger output (TRIG.OUT). Use the [Trigger] screen to
congure the external trigger (EXT.TRIG) setting.
> [System] > [External terminal]
55
Connecting the Instrument with computers
2.4 Connecting the Instrument with computers
Connecting the instruments with computers via a LAN cable allows computers to control and
monitor the instrument. Connect LAN cables to the 1000BASE-T connector of computers and
instrument. The procedures for connecting the cables (2 ways) are as follows.
(1) Connecting the instrument to the existing network
Connecting the instruments with a hub via LAN cables allows computers to control and monitor the
instruments.
Connecting one instrument to multiple PCs Connecting multiple instruments to one computer
LAN cable* LAN cable*
Hub Hub
Model MR8740T
LAN
Computer
LAN
HubHub
Model MR8740T
LAN cable*
LAN cable*
Computer
*: Use one of the following cables:
• 1000BASE-T straight-through cable (maximum length: 100 m, commercially available)
• Model 9642 LAN Cable (optional)
(2) One-to-one connection of the instrument and a computer
Connecting the instruments with computers via a LAN cable allows computers to control and
monitor the instrument.
Model MR8740T
Computer
LAN cable*
*: Use one of the following cables:
• 1000BASE-T compatible crossover cable (maximum length: 100 m)
• 1000BASE-T straight-through cable and crossover connector (maximum length: 100 m)
• Model 9642 LAN Cable (optional, coming with crossover connector)
CAUTION
When connecting the instrument to your LAN using a LAN cable of more than 30 m or
with a cable laid outdoors, take appropriate countermeasures that include installing a
surge protector for LANs. Such signal wiring is susceptible to induced lighting, which
can cause damage to the instrument.
2
Preparing for Measurement