Mitsubishi A1S61PN

Product Name: Mitsubishi Electric A1S61PN — Positioning Module

Product Introduction:
The A1S61PN is a high-speed positioning module manufactured by Mitsubishi Electric for the A1S series (FX1S/FX1N/FX2N compatible) programmable logic controllers. It provides independent pulse output for servo motor and stepper motor control without loading the main CPU.

Category: Others

Description

Model Series: Mitsubishi A Series — A1S (A1SHCPU, A1SCPU) compatible expansion modules

Technical Specifications:

Parameter	Value
Number of Axes	1 axis (independent)
Pulse Output Frequency	Max 100 kHz
Output Mode	Pulse + Direction (differential line driver)
Positioning Instructions	DRVI, DRVA, PLSY, PLSR, PLSR2, PLSR3
Maximum Positioning Points	32,767 points
Positioning Range	-999,999 to +999,999 pulses
Power Supply Voltage	DC 5V (from base unit)
Current Consumption	180 mA (from 5V supply)
Weight	Approx. 80 g
Dimensions (W×H×D)	98 × 90 × 42.5 mm

Functional Features:

Independent high-speed pulse generation offloaded from CPU
Supports absolute and relative positioning
Built-in jog operation capability
Zero return (origin return) function
Electronic gear ratio setting
Torque limit function (stall detection)
Dog-search (zero-point search) function

Performance Parameters:

Pulse Resolution: 1 pulse = 1 count (no built-in gear; gear set via CPU)
Response Time: Less than 0.1 ms from command to output
Operating Temperature: 0°C to +55°C
Storage Temperature: -20°C to +70°C
Vibration Resistance: 9.8 m/s² (10–55 Hz)

Structural Features:

Mounts on DIN rail or directly on base unit
40-pin connector compatible with A1S base
LED indicators: POWER, RUN, ERROR, AXIS

Working Principle:
The module receives positioning commands (number of pulses, speed, direction) from the CPU via the system bus. It generates high-speed pulse trains independently using an onboard pulse generator IC. The output is sent as differential line driver signals (PULS+, PULS−, SIGN+, SIGN−) to a servo amplifier or stepper driver. Position feedback (if used) is read back via the CPU, not the module itself.

Advantages:

Zero CPU load during positioning operations
High-speed 100 kHz pulse output
Simple parameter setting via GX Developer / GX Works2
Compact form factor

Applicable Industries:

CNC machine tools
Packaging machinery
Textile machinery
Printing equipment
Material handling / conveyor systems
Semiconductor equipment

Installation Requirements:

Mount on DIN rail (35mm) or attach to A1S base unit
Ensure proper grounding of shield wire for pulse output cables
Use shielded twisted-pair cables for pulse signals (max 50m recommended)
Power supplied from base unit — no external power required

Usage Precautions:

Do not connect pulse output directly to motor — always use a servo amplifier or stepper driver
Keep pulse output cables separate from power lines (min 100mm spacing)
Set electronic gear ratio correctly to avoid over-travel
Verify stall detection settings before operation

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