H-22HMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.Refer to the NC Linear Scale Systems Brochure (No. E13005) for more details.•The PSU-200 splits the sinusoidal signal output by Mitutoyo linear scales into a minimum of four and a maximum of 200 divisions, and converts the signal to a square-wave signal so that NC feedback systems, measurement control devices, etc., can be used with linear scales in order to achieve highly accurate positioning.•PSU-251 series is a serial signal interface unit for incremental linear scales.The interface outputs serial data equivalent to 400 divisions from the sinusoidal signal (according to EIA Standard RS-422-A)•The PSU-251 can be connected to Mitsubishi Electric Corporation's MR-J4/MR-J3 series servo amplier.•Since this unit is connected to incremental linear scales, the reference point should be passed through to determine the absolute position.Pulse signal interface unit PSU-200SERIES 539Serial signal interface unit PSU-251/252SERIES 539SPECIFICATIONSOrder No.539-005ModelPSU-200Number of axes1 InputInput connector DA-15S-N (JAE) or equivalentInput signal: 2-phase sinusoidal and the reference voltage, Reference point, Scale alarmOutputOutput connector: MR-20RMA (HONDA TSUSHIN KOGYO CO., LTD.)Output signal: 2-phase square-wave signals (PA, PB), reference point (PZ), Alarm, Alarm reset, Photo-couplerNumber of divisions4, 8, 10, 20, 40, 80, 100, 200 (Selectable by switch)FunctionSetting the number of divisions, setting the minimum edge interval, and maximum response speed.Detection of broken wires or short circuits and abnormalities (alarm), detection of signal errors (alarm).Power supply voltage low alarm (warning light only), switching between high-impedance mode and alarm signal output mode. Reference position detection light, hysteresis width settings (directly linked to No. of divisions), external alarm reset input (photocoupler)Power supply voltageDC5 V±5 %Current consumption200 mAOperating temperature range 0 to 50 °CStorage temperature range–20 to 70 °CDimensions160(W)×100(D)×28(H) mmMassApprox. 620 gSPECIFICATIONSOrder No.539-006539-007ModelPSU-251PSU-252Number of axes1 Input2-phase sinusoidal signals and standard voltage, reference signal, scale alarm signal.Maximum input frequency: 500 kHzOutputMitsubishi Electric Corporation MR-J4/MR-J3 seriesHigh-speed serial data*Panasonic Corporation Motor Business UnitMINAS-A5, A5L, A5N, A5NL Series*MINAS-A4, A4P, A4N, A4NL Series*Number of divisions400 FunctionAlarm detection: Broken wires, short circuits in the scale and abnormalities.Alarm output: Status data is output through serial communication and the PWR light blinks.Also, the PWR light turns on.Power supply voltagePower supply from the servo amplifier: DC5 V±5 %External power supply: DC5 V±5 % Power supply is selected with the shorting link for the terminal block used to supply external power. To choose a servo amplifier or external power supply, please refer to the servo amplifier power specifications (in particular, the maximum supplied current) and the power supply specifications of the scale that is used.Current consumption150 mA (not including the scale)Operating temperature range 0 ºC to 40 ºCStorage temperature range–20 ºC to 70 ºC* Please contact each manufacturer for details of the applicable systems.