SIGNAL CONDITIONERS Isolated Signal Conditioner MS3700 Series【77】

Slim Plug-in Signal Conditioners with Isolated Single/Dual Output

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The MS3700 Series features 29 mm slim design, plug-in connection, wide-range AC power input, high accuracy and durability, and a 7-year warranty, the longest in the industry.

  • Slim plug-in design for easy maintenance
  • Standard series, featuring the largest model line-up among all our series
  • Isolated single output (3-way isolation) / isolated dual output (4-way isolation)*1
  • Function modules, alarm setters, math computation modules, and programmable models are available.*2
  • DIN rail / wall mounting
  • A total of 46 models
  • A wide range of applications from a single to multiple use

*1 Non-isolated I/O models (2-way isolation) are available. Please refer to the relevant product specification sheet.
*2 Programmable models are only MS3768 and MS377□.
*3 Products are warranted for years from the date of shipment.
*4 This feature is limited to some models, so please check our model list.

Warranty Period *3 7Years
Standard Lead Time *4 4Days[即急対応]※原稿無し
Power Supply Rating: 100-240V AC / 24V DC
Connection M3.5 screw

Slim plug-in isolated signal conditioner

The MS3700 Series is a line of slim signal conditioners (size: W29 × H86 × D125 mm, including the socket) that offers isolated single or dual output with high reliability and high accuracy.


Conformal coating applied as standard

Coating is not only resistant to accidental exposure to corrosive gas or oily smoke, but has a number of benefits contributing to long-term reliability. It avoids direct exposure to air to protect printed circuit boards and electronic parts against humidity, moisture, dust, chemicals, and thermal stress, thereby preventing corrosion, migration and any other damages. (HumiSeal® 1A27NSLU is used as a conformal coating. )


Gold-plated contact parts

To achieve high reliability and durability, the contact parts of the main unit and socket are plated with gold of 0.2 μm in thickness. This prevents not simply wear caused by insertion and removal of the unit, but contact degradation even in harsh environments to ensure high reliability for a long period.


Drop-proof screws employed

The screws employed eliminate the need to care about dropping them during the wiring work. Besides, the M3.5 screws are one size larger than those for competitive products of the same grade, which makes field wiring much easier.


Ceramic capacitors employed

This series employs ceramic capacitors to achieve low current draw with extremely low heat generation, thus leading to long service life.
(The ceramic capacitors are not affected by prolonged use, as opposed to aluminum electrolytic capacitors.)*5 。


Multi-turn trimmers employed

This series employs multi-turn trimmers for zero and span adjustments. Our conventional series have used 3-turn or 4-turn trimmers, but the multi-turn trimmers employed facilitate fine adjustment and provide improved resistance to vibration. The new trimmers also have static protection.


Close mounting

The MS3700 Series design is such that the width of the socket is 4 mm (2 mm each side) larger than that of the main unit. Even if you mount two or more sockets side by side, there should always be a clearance between the modules, thereby preventing a rise in temperature around them.


Socket provided with a power terminal block cover as standard

For safety reasons, the socket is provided with a power terminal block cover as standard.


Equipped with set value indicator LED

Several models, including ratio/bias converters, alarm setters and a manual setter, are equipped with a set value indicator LED.*6


Set values are adjustable with the front accessible switches

For user-configurable signal conditioners, including function modules, math computation modules and alarm setters, the factors or alarm settings can be easily changed only with the front-accessible switches. No hand-held terminal required. Simple to use and efficient!


Distributor provided with a transmitter power supply switch

The 3707 distributor (with isolation) has a transmitter power supply switch on its front panel. Turning this switch off allows the distributor to be used as an isolator for adjustment. If you have not yet decided whether to use a distributor or an isolator at the design phase, you should select this model so that it can be used for both applications.
(Note that the terminal connections are different depending on whether the unit is used as a distributor or an isolator.)
(The non-isolated model, MS3737 also includes a transmitter power supply switch.)

*5 DC powered: No aluminum electrolytic capacitors or tantalum capacitors used.
AC powered: Aluminum electrolytic capacitors are partly used in the power section.
*6 User-configurable models, including function modules and math computation modules, only.

Module Specifications

Wiring M3.5 screw terminal connection (with a power terminal block cover & drop-proof screws)
Materials Housing and SocketABS resin (UL 94V-0)
Screw TerminalNickel-plated steel
Surface Treatment for Plugs and Receptacle HolesBrass with 0.2 µm gold plating
PCBGlass fabric epoxy resin (FR-4: UL 94V-0)
Conformal CoatingHumiSeal® 1A27NS (Polyurethane)
Isolation 3-way (single output) or 4-way (dual output) isolation between input, output 1, (output 2), and power.*
Insulation Resistance 100Ω min. (@ 500V DC) between input, output 1, (output 2), power, and ground.*
Dielectric Strength 2000V AC for 1 minute between input, output 1, (output 2), power, and ground.*

Power Specifications

Power Requirements 85 to 264V AC: Rating 100 to 240V AC (47 to 63 Hz)
24V DC ± 10%
85 to 264V DC: Rating 100 to 240V DC
Overcurrent Protection 160 mA fuse

Installation Specifications

Operating Temperature Range -5 to 55℃
Operating Humidity Range 5 to 90% RH (no condensing)
Storage Temperature Range -10 to 60℃
Installation Wall/DIN rail mounting
Dimensions W29 × H86 × D125 mm (including the mounding screw and socket)
Weight Main Unit 120g max.
Socket 80g max.

*Non-isolated models are available. Please refer to the relevant product specification sheet.

Dimensional Drawings

Unit: mm