Description

The ACQUISITION LOGIC AL81G is a high-performance 8-channel digital input module designed for industrial automation and control applications. This robust module serves as a critical interface between field devices and control systems, providing reliable acquisition of discrete signals from sensors, switches, and other digital field devices. The ACQUISITION LOGIC AL81G features galvanic isolation that prevents ground loops and protects control system components from voltage surges and electrical noise commonly encountered in industrial environments. With its wide input voltage range and high noise immunity, this module ensures accurate signal acquisition even in electrically challenging conditions, making it suitable for deployment in manufacturing facilities, process plants, and machinery applications.

Engineered for industrial durability, the ACQUISITION LOGIC AL81G incorporates robust protection features including reverse polarity protection, overvoltage protection, and transient suppression. The module’s compact design allows for high-density installation in control panels while maintaining excellent thermal performance and long-term reliability. The ACQUISITION LOGIC AL81G supports standard digital input configurations, providing flexibility for various field wiring schemes and compatibility with different types of field devices. Its LED status indicators for each channel enable quick visual diagnosis of channel status, simplifying troubleshooting and maintenance operations.

The module is designed for easy integration with various PLC and control systems through standard mounting and connection methods. The ACQUISITION LOGIC AL81G delivers exceptional performance in demanding industrial environments where reliable digital signal acquisition is essential for automated control and monitoring. Its combination of advanced isolation technology, comprehensive protection features, and user-friendly design makes it an ideal solution for applications requiring high reliability and maintenance-free operation.

AL81G ACQUISITIONLOGIC

Technical Specifications

Parameter Name	Parameter Value
Product Model	AL81G
Manufacturer	ACQUISITION LOGIC
Product Type	Digital Input Module
Number of Channels	8 channels
Input Type	Sinking/Sourcing
Input Voltage Range	10-30 V DC
Nominal Input Voltage	24 V DC
Threshold Voltage	ON: 10 V DC min, OFF: 5 V DC max
Input Current	5 mA typical @ 24 V DC
Isolation	1500 V AC channel-to-channel
Response Time	≤ 3 ms
Maximum Switching Frequency	100 Hz
Operating Temperature	-25°C to +55°C
Storage Temperature	-40°C to +85°C
Relative Humidity	5% to 95% (non-condensing)
Connection Type	Removable terminal block
Status Indication	LED per channel
Protection	Reverse polarity, overvoltage protection

Main Features and Advantages

The ACQUISITION LOGIC AL81G offers superior electrical isolation performance with 1500V AC channel-to-channel isolation, ensuring complete electrical separation between field devices and the control system. This high level of isolation prevents ground loops, eliminates noise transmission, and protects sensitive control system components from voltage spikes and transients that commonly occur in industrial environments. The module’s wide input voltage range of 10-30V DC provides compatibility with various field devices and accommodates voltage fluctuations that may occur in industrial power systems. This flexibility makes the ACQUISITION LOGIC AL81G suitable for diverse applications without requiring additional signal conditioning.

Enhanced diagnostic capabilities: The ACQUISITION LOGIC AL81G features individual LED status indicators for each channel, providing immediate visual feedback of input status. This simplifies troubleshooting and reduces downtime by allowing maintenance personnel to quickly identify problematic channels or field devices. The module’s fast response time of ≤3ms ensures rapid detection of state changes, making it suitable for applications requiring quick response to process events. The robust construction of the ACQUISITION LOGIC AL81G includes comprehensive protection against reverse polarity, overvoltage conditions, and electrical transients, enhancing reliability and extending service life in harsh industrial environments.

Installation flexibility and maintenance ease: The ACQUISITION LOGIC AL81G is designed for straightforward installation and maintenance with its removable terminal block that simplifies wiring and module replacement. The compact form factor allows for high-density mounting, maximizing space utilization in control panels. The module’s operating temperature range of -25°C to +55°C ensures reliable performance in various environmental conditions. These features combine to reduce installation time, simplify maintenance operations, and minimize downtime, providing significant advantages in industrial automation applications where reliability and ease of maintenance are critical considerations.

Application Field

The ACQUISITION LOGIC AL81G finds extensive application across various industrial sectors where reliable digital signal acquisition is required. In manufacturing automation, the module is used to monitor limit switches, proximity sensors, and push buttons on production machinery, conveying systems, and assembly lines. The high noise immunity and isolation features of the ACQUISITION LOGIC AL81G make it particularly valuable in environments with significant electrical noise from motors, drives, and welding equipment. Its robust design ensures reliable operation in automotive manufacturing plants, where continuous production depends on accurate signal acquisition from numerous sensors and switches.

Process industries utilize the ACQUISITION LOGIC AL81G for monitoring discrete field devices in chemical processing, water treatment, and pharmaceutical manufacturing facilities. The module’s galvanic isolation protects control systems from ground potential differences that can occur in large industrial plants, ensuring accurate signal acquisition and system reliability. In material handling and packaging applications, the ACQUISITION LOGIC AL81G provides reliable input from photoelectric sensors, encoders, and safety interlocks, supporting efficient and safe operation of automated equipment. The module’s wide operating temperature range makes it suitable for use in both climate-controlled environments and areas subject to temperature variations.

Building automation systems also benefit from the ACQUISITION LOGIC AL81G‘s capabilities for monitoring status inputs from security devices, access control systems, and energy management equipment. The module’s flexibility in supporting standard input configurations allows integration with various types of field devices commonly found in building automation applications. In each of these applications, the ACQUISITION LOGIC AL81G provides the reliable digital input acquisition necessary for effective control and monitoring, contributing to improved operational efficiency and system reliability.

AL81G ACQUISITIONLOGIC

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