User's Manual
MS3744
Slim Plug-In High-Level Signal Conditioner with Isolated Single/Dual Output
(Fast Response Model)
Rev. 1.60
2
On Wiring:
Connections to the instrument should be made to the terminal
block. For assignment of the terminals, refer to section 6. The
recommended screwing torque is 0.8 to 1.0 Nm.
For lead wires, use a highly flexible stranded conductor. The
recommended nominal cross-section of the lead wire conductor
is 0.5 to 2.0 mm
2
.
The connection of the lead wire to the terminal block should be
made with the insulated crimp terminal attached to the end of the
wire. Without the insulation, short circuit or electric shock may
occur. The recommended thickness of the crimp terminal is 0.7
to 1.0 mm.
Note that only up to two (2) crimp terminals can be connected to
one (1) terminal screw. In this case, the thickness of the crimp
terminal should be not greater than 0.8 mm.
φ3.7
6.8
m
ax
.
3.4 max.
4.6 min.
To Avoid Erroneous Measurements:
In order to reduce the influence of noise, the input/output wire
and power supply wire should not be used in a same bundle or
same conduit. They should be installed separately with a
minimum distance of 200 mm.
Avoid wiring the signal lines in the vicinity of equipment
generating magnetic fields or electromagnetic waves, such as
electric motors and large-scale transformers. If inevitable,
anti-noise measures such as employment of shielded wires are
indispensable.
At least 30 minutes of warm-up is required prior to operation.
Any sensor or equipment to be connected to the instrument
should be selected in consideration of the input/output
impedance of the same. (For detailed specifications, refer to
section 4 or the relevant product specification sheet that can be
downloaded from our website at https://www.mtt.co.jp.)
Special Notes for CE Marking:
The instrument is designed and manufactured to conform to the
following EMC and Low Voltage Directives:
EMC Directive (2014/30/EU)
- Standard conformity: EN61326-1:2013 Class A
Low Voltage Directive (2014/35/EU)
- Standard conformity: IEC61010-1
EN61010-1:2010/A1:2019
- Overvoltage Category: II
- Pollution Degree: 2
The instrument must be installed in a control panel.
The instrument maintains basic insulation between input and
output, and between output and FG. Prior to installation, check
that the insulation class of the instrument satisfies your system
requirements.
When the instrument is installed in a control panel, the measures
to be taken for CE marking conformity may vary with the type of
devices connected, wiring to the instrument or structure of the
control panel. Therefore, you should check that the control panel
as an overall system conforms to the CE marking regulations.
4. About the Product
The MS3744 accepts DC input and provides isolated DC output.
Features:
Wideband signals and fast response
Pin and socket contacts are gold-plated (0.2
μ
m) to ensure high
reliability and long-term stability.
High dielectric strength of 2,000 VAC between input, [output 1,
output 2], power, and ground.
The power unit can deliver AC power ranging from 85 to 264V
steplessly without switching to meet varied power requirements.
Plug-in type for better maintainability
Drop-proof terminal screws for ease and safety of installation
Fuse installed in the power line as standard.
Installation Position
Typical Installation Example
