User's Manual
MS3704SW
Slim Plug-In High-Level Signal Conditioner (Isolator) with Isolated Dual Output
(I/O Switch Selectable)
Rev. 1.30
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 MS3704SW accepts DC input and provides isolated dual output.
The module has built-in selector switches, allowing the user to
configure input and/or output for either 1-5V or 4-20mA.
Features:
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.
Specifications
* It will be set to 4-20mA if not specified.
Input
1-5V or 4-20mA
Selectable by the rear-accessible switch. *
Input Resistance
Voltage input:
1M
Ω
min. with or without power.
Current input: 250
Ω
Allowable Input
Voltage
Voltage input: 30V DC max., continuous.
Current input: 40mA DC max., continuous.
Output
1-5V or 4-20mA
Selectable by the front-accessible switch. *
Allowable Output
Load
Voltage output: 2mA max.
Current output: Output 1 :750
Ω
max
Output 2: 350
Ω
max.
Zero Adjustment
Output 1: Approx. ±5% of span.
Output 2: Approx. ±5% of span.
(Adjustable by the front-accessible trimmers.)
Span Adjustment
Output 1: Approx. ±5% of span.
Output 2: Approx. ±5% of span.
(Adjustable by the front-accessible trimmers.)
Accuracy Rating Better than ±0.1% of span (at 25°C±5°C)
Temperature
Effect
Better than ±0.2% of span per 10°C change in
ambient.
Response Time 85ms max. (0-90%) with a step input at 100%.
Insulation
Resistance
100M
Ω
min. (@ 500V DC) between input,
output 1, output 2, power, and ground.
Dielectric
Strength
Input / [Output 1, Output 2] / [Power, Ground]:
2000V AC for 1 minute (Cutoff current: 0.5mA)
Power / Ground: 2000V AC for 1 minute (Cutoff
current: 5mA)
Output 1 / Output 2: 500V AC for 1 minute
(Cutoff current: 0.5mA)
Surge Withstand
Capability
Tested as per ANSI/IEEE C37.90.1-1989.
Storage
Temperature
-10 to 60°C
Installation Position
Typical Installation Example
