FANUCI/O Unit-MODEL A High Speed Counter Module ACT01A, 1 Channel to 500 kHz, A/B Phase and Pulse Modes

Product Description

What this part is

Fanuc A03B-0807-C053, module type ACT01A, the high-speed counter module for the FANUC I/O Unit-MODEL A. It counts fast pulse trains: encoder quadrature signals, or positive and negative pulse streams, at rates above what an ordinary discrete input module can follow. It is a counting input module and switches no loads. Fanuc’s own I/O Unit-MODEL A module list names ACT01A under high-speed counting. The discrete output modules in this family are the AOD, AOA and AOR ranges (AOD32A1, AOD16C, AOR16G and so on).

Order code breakdown

A03B: Fanuc’s own product scheme for CNC peripheral and I/O hardware. This is a Fanuc number and not a GE Fanuc IC-prefix number, and the two catalogues are separate. 0807: the FANUC I/O Unit-MODEL A range. C053: in this family Fanuc lists two numbers per module, a J-number for the complete unit and a C-number for the printed circuit board (for example base unit ABU10A is unit A03B-0807-J001, PCB A03B-0807-C001), so C053 is the circuit-board order number for the ACT01A. ACT01A: the module type name marked on the board, where ACT = counter, 01 = one channel and A = version.

Published specifications

Module type: ACT01A, high-speed counting module. Counting channels: 1. Maximum counting frequency: up to 500 kHz. Counting modes: A/B phase (quadrature), positive pulse, and negative pulse. Required current: 170 + 0.3 × α mA from the +24 V supply. Basic heat value: 4.1 W. Platform: FANUC I/O Unit-MODEL A. Fanuc manual reference: B-61813E / B-61813EN, I/O Unit-MODEL A Connection and Maintenance Manual.

Specifications in practice

500 kHz separates this module from a discrete input card. A standard AID-series digital input on this platform has a response time of 2 to 20 ms, which caps it at a few hundred hertz. The ACT01A has dedicated counting hardware, so the count holds at speed and the CPU reads the accumulated value.

Mode choice follows the sensor. A/B phase is the quadrature mode for an incremental encoder and gives direction as well as magnitude, since the phase relationship between the two channels tells the counter which way the shaft is turning and the count goes up or down accordingly. Positive and negative pulse modes are for single-channel sources such as a flowmeter, a proximity switch on a toothed wheel, or a totalising sensor, where there is no direction information and the count accumulates.

One channel per module is the practical constraint. Counting two encoders takes two modules and two slots, and the +24 V budget grows accordingly. The 4.1 W basic heat value is high for this family, where most digital modules run 0.1 to 1.2 W.

What is included

Module as pictured. This listing does not include the I/O Unit-MODEL A base unit (ABU05A, ABU10A, ABU05B or ABU10B); the interface module (AIF01A, AIF01B or AIF02C) that the base unit needs to talk to the CNC; the +24 V DC supply; encoder or sensor cables, connectors or connector kits; the terminating resistor unit (A03B-0807-K806) required at the end of an I/O Link group; a terminal board; a rack or cabinet; or documentation. An I/O Unit-A is a base unit plus an interface module plus I/O modules, and this is one of the I/O modules.

Mounting data

The module seats in a slot of an I/O Unit-MODEL A base unit and is addressed by its slot position, so the module’s place in the unit determines how the CNC or PMC sees it. The counting mode is set to suit the sensor. Encoder wiring is shielded twisted pair, routed clear of servo motor power and spindle cabling, since at 500 kHz the module counts induced noise as faithfully as real pulses. An I/O Link group carries a terminating resistor at its end. The board is static-sensitive.

Interchange guidance

A03B-0807-C053 is the PCB order number for the ACT01A. A03B-0807-J053 is the corresponding complete-unit number for the same module. The AOD, AOA and AOR modules in this family are outputs and serve a different function. The analog modules AAD04A (4-channel 12-bit analog input), ADA02A and ADA02B (analog output), and the temperature-input modules ATI04A and ATI04B are likewise separate functions on the same platform. Also searched as A03B0807C053, A03B 0807 C053, ACT01A, ACT-01A, Fanuc high speed counter module, and Fanuc I/O Unit A counter card. Sold as 1 piece.