MODEL: MSP40

MSP40 SPECIFICATIONS

ES-4883 Rev.0 Page 3/5

http://www.m-system.co.jp/

PERFORMANCE

Resolution: 1/1000 of the output stem operation distance or

0.015 mm, whichever is greater, with the deadband set to

0.1 %

Insulation resistance: Power or I/O signal to Retract/UP

signal to Extend/DOWN signal to alarm output to

communication to housing

≥ 100 MΩ with 500 V DC

Dielectric strength: 500 V AC @1 minute

(Power or I/O signal to Retract/UP signal to Extend/DOWN

signal to alarm output to communication to housing)

STANDARDS & APPROVALS

•RoHS Directive

EN 50581

TERMINOLOGY

•Auto-Setup function

Function to automatically adjust the Full-closed (lower-end)

position and the Full-open (upper-end) position with simple

operation.

•Modbus communication

Operation status of the actuator can be monitored during

normal operation for ensuring safe operation of the product

and supporting equipment maintenance.

Via Modbus communication, the following data can be

monitored to grasp the operation status of the actuator.

- No. of times of start actions of the stepping motor

- No. of times of reverse actions of the stepping motor

- Accumulated operating time of the stepping motor

- Accumulated operation distance of the output stem

- No. of times of restart when an excessive thrust error

occurs

- Excessive thrust error

•Excessive thrust monitoring

Function to stop the stepping motor when an excessive

thrust is detected.

Specifically, the unit constantly monitors the position of the

output stem while the stepping motor is driven.

When the unit detects that the output stem is not following

the driving of the motor, the motor is paused, then

restarted at a low speed.

If the output stem does not follow the motor after two times

of restart, an error of excessive thrust occurs and the

stepping motor is stopped.

•Operation at abnormally low input

Function to drive the stepping motor before stopping it to

operate the output stem to 'Retract (UP)', 'Extend (DOWN)',

or 'Stop' according to the initial setting when the unit

detects abnormally low input.

The unit detects an error when current input (4-20 mA DC)

is lower than 2.56mA DC±0.4mA DC) or voltage input (1-5V

DC) is lower than 0.64V DC±0.1V DC).

•Deadband

Linear resolution

•Restart limiting Timer

The restart limiting timer is set for preventing frequent stop-

and-restart operation of the motor.

That is, when the motor stops, the motor waits for a set

period of time instead of stopping and restarting

immediately upon change in input signal.

• Hunting

Hunting is a condition in which the output stem is oscillated

repeatedly and persistently without settling at a single

position.

The output stem operation at the frequency of roughly 13

strokes or less per minute (duty ratio: <50%) is regarded as

normal.