Alpha 630 Counter, Phase and Status Input Module

€ - POA



What is the Alpha 630 Counter, Phase and Status Input Module?
The Alpha 630 is a 20 digital channel input and counter module with quadrature support. The 630 module provides six digital inputs for counting, frequency or status measurements.

Counting and frequency measurements on these channels support inputs to 15KHz. They can also be configured as three phase decoder channels each with two-phase inputs.

Fourteen additional op-to-isolated channels for medium speed counting, low frequency and digital status measurement are included. Ten of these channels support counting and frequency measurements to 1Khz.

A further option supported by the module is 5 auxiliary channels – These, if included, are normally an op-to-isolated status input and 4 relay outputs.

They are intended for local functions, perhaps under the direct control of the module rather than from the host computer.

However they can be controlled from the host and used as additional general-purpose channels. These auxiliary channels are available on the 630A product version. Specific operation can be easily programmed for custom applications.

An RS485 multi-drop interface is provided for normal operation with other Alpha series modules and a host computer. It can operate at speeds of up to 230KB with cable lengths of up to 1.2Km.

As with most other modules in the Alpha series, a local serial interface can be used to program and monitor operation locally independent of the communications on the RS485 network.

This can be very convenient during installation or used later to diagnose application problems at the measurement site.

Alternatively it could be used with a permanent local process display. Customized display output can be provided. All programming can be stored in secure non-volatile flash memory.


  • Counting, Phase, Status in compact DIN rail module.
  • Frequency measurements.
  • Quad phase decoder channel pairs.
  • Programmable Measurement Types
  • Auxiliary I/O (630A option)
  • Second local diagnostic serial interface 4 High speed comms 230KB (460KB)


Specification Details

Number of channels / module: 16

Input threshold: 3.5V

Isolation: Each channel is individually isolated.

Input operating range: 3.5 – 12V

Input count rate: 15KHz.

Status LEDS

Colour: Red

Functions: Power

RS485 Communications

RS232 Communications

Channel 1-20 – Status level present. Status of Auxiliary channels if fitted.

Phase Decoder Channels

Number of phase decoder inputs: 3 pairs (Using the 6 freq channels)

Input threshold: 3.5V

Input operating range: 3.5 – 12V

Resolution: Two pairs offer discrimination of each edge 4 counts per pulse pair.

Third channel operates at 1 count per two pulses.

Input count range: 15KHz

Minimum width/gap: 10US

Isolation: Each channel is individually isolated.

Time base accuracy: Typically 0.03%

Module Dimensions

Dimensions: 180 x 120 x 65 mm DIN Rail mounting

Weight: 0.6Kg


RS484 Communications interface: Baud rates to 230KB supported (460KB is available for some applications)

Measurement throughput of link: 10,000/sec (depends on application) 2000-4000 / module type.

Local RS232 Interface: Baud rates 384Kb supported.


Software: No internet access required.


-20 to 60°C ambient.

0 – 90% RH

Status Counter Channels

Number of status channels per module: 14

Measurement functions: Status, counting, frequency

Max count rate: 1000/sec each channel (4 channels), 100/sec on each channel (6 channels)

Input threshold: 4V

Input operating range: 4 – 24V

Isolation: Each channel is individually isolated.

Update rate – counters or status function: 1000/sec 4 channels, 100/sec 14 channels

Power Requirements

12 – 36V DC or 24AC

630 – Power < 3W

630A – Power < 5W

Auxilary Channels (Option – 630A)

Number of op-to-isolated inputs: 1

Number of relay outputs: 4

Relay output rating: 48V 2A, Fused



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