The ABB Saft 123 PAC Amplifier Pulse Board: Critical for Flow, Speed, and Batch Counting

The ABB Saft 123 PAC / Saft123PAC is a specialized amplifier pulse board developed by ABB, typically part of their instrumentation or control system components. This module is designed to condition, amplify, and process low-level pulse signals from sensors such as turbine flow meters, proximity pickups, or encoders. Its primary function is to convert raw, often weak or noisy sensor pulses into clean, standardized digital signals suitable for processing by controllers, counters, or data acquisition systems, ensuring measurement accuracy and system reliability.

Category: FUJI

Contact Us WhatsApp / Wechat：+8618150087953
Phone：+86 18150087953
Email：sales@cxplcmro.com

Description

Application Scenarios

In a large oil refinery, the precise custody transfer of a feedstock (like crude oil) between tankers and storage tanks is critical for financial accounting. The measurement relies on a high-accuracy turbine flow meter installed in the pipeline. The meter generates a low-voltage, sinusoidal pulse train where each pulse represents a discrete volume. This raw signal is susceptible to electrical noise from pumps and motors and can degrade over long cable runs. The ABB Saft 123 PAC Amplifier Pulse Board is installed in a junction box near the meter. It receives the raw sensor signal, filters out high-frequency noise, amplifies it to a robust logic level (e.g., 24V DC), and shapes it into a clean, square-wave pulse. This conditioned signal is then transmitted reliably to the flow computer or PLC (like the YXI115B). The Saft123PAC directly addresses the core challenge of preserving signal integrity in a harsh environment, ensuring that every single pulse—and thus every barrel of oil—is counted accurately, which is fundamental for billing, inventory control, and process balancing.

Parameter

Main Parameters	Value/Description
Product Model	ABB Saft 123 PAC / Saft123PAC
Manufacturer	ABB (Asea Brown Boveri)
Product Category	Signal Conditioning Amplifier / Pulse Shaping Board
Primary Function	Amplification, filtering, and shaping of low-level AC or pulse signals into standardized digital outputs.
Input Signal Type	Typically accepts signals from: Magnetic Pickups (MPU), Variable Reluctance Sensors, Turbine Flow Meters, Geared Proximity Sensors. Signals are often low-voltage AC (mV to few V range).
Input Impedance	High input impedance to minimize loading on the sensor, preserving signal strength.
Frequency Range	Designed to handle a specific pulse frequency range (e.g., 0 Hz to 20 kHz), suitable for speed and flow applications.
Amplification Gain	Adjustable or fixed gain to boost the weak sensor signal to a usable level.
Output Signal	Clean, square-wave pulse or transistor (NPN/PNP) output, typically at logic levels (e.g., 24V DC, 0/24V). Compatible with PLC digital inputs.
Power Supply	Requires an external DC power source, typically 24V DC, standard for industrial control.
Filtering	Built-in low-pass filtering to suppress high-frequency electrical noise (EMI/RFI).
Adjustments	May feature potentiometers for setting: Trigger/Sensitivity Level, Gain, Pulse Width.
Status Indication	LEDs for Power On, Input Signal Detection, and Output Pulse activity.
Mounting	Typically DIN-rail mounted or panel-mounted in an enclosure.
Connection	Screw terminal blocks for power, sensor input, and amplified output.