Pepperl+Fuchs VAA-4E4A-G4-ZE/E2 AS-Interface I/O Module

Technical Overview

The Pepperl+Fuchs VAA-4E4A-G4-ZE/E2 AS-Interface Module is a robust G4 module featuring 4 PNP inputs and 4 electronic outputs. Designed for demanding industrial environments, it offers IP65 protection and integrates communication monitoring for enhanced reliability. This module supports both 2-wire and 3-wire sensors, mechanical contacts, and provides flexible connectivity options for flat or round cables using standardized EEMS bases (sold separately).

Key Features

Protection degree IP65.
Supports flat or round cable connection (via standardized EEMS base, not included).
Cable piercing method for flat cable.
Integrated communication monitoring with output turn-off if AS-Interface communication is lost for over 40 ms.
Four inputs for 2- or 3-wire PNP sensors, DC.
Four electronic outputs, max. 24 V DC and 1 A per output.
Function display for bus, external auxiliary voltage, inputs, and outputs via dual green/red LED (PWR/FAULT) and channel LEDs.
Monitoring of sensor overloads.
Suitable for harsh field conditions.
User-friendly installation via cable glands and cage spring terminals.
Pre-addressing capability with VBP-HH1 hand-held programming device adapter.

Technical Specification Matrix

Parameter	Value
Slave type	Standard slave
AS-Interface specification	V3.0
Required master specification	≥ V2.0
Protection degree	IP65
Auxiliary voltage (output)	24 V DC ± 15 % PELV
Number/Type of Inputs	4 inputs for 2- or 3-wire sensors (PNP), DC
Number/Type of Outputs	4 electronic outputs
Output load capacity	max. 24 V DC and 1 A per output
MTTFd	150 a
Mission Time (TM)	20 a
Diagnostic Coverage (DC)	0 %
UL File Number	E87056

Industrial Applications

1. Conveyor System Sensor Integration in Dusty Environments

This module can integrate multiple proximity or photoelectric sensors on a conveyor belt system, reading their PNP signals (4 inputs) and controlling small actuators or indicators (4 electronic outputs) along the line. Its IP65 rating protects against dust and water spray common in manufacturing plants.

Problem Solved

Reliably connecting and powering multiple sensors and actuators in a harsh, dusty, or occasionally wet industrial conveyor environment while providing centralized AS-Interface communication and output control.

Conveyor AutomationIP65 ProtectionPNP SensorsAS-Interface V3.0Dust and Water Resistant

2. Machine Tool Door and Safety Guard Monitoring

The module is ideal for monitoring the open/closed status of up to four machine tool safety guards or doors using 2- or 3-wire PNP safety sensors. The communication monitoring feature ensures that if AS-Interface communication is interrupted, the connected outputs (e.g., small indicator lights or lockout mechanisms) can be switched off for safety.

Problem Solved

Providing robust and fail-safe monitoring of multiple safety interlocks on industrial machinery, ensuring immediate response (output deactivation) in case of communication loss, critical for personnel safety.

Machine SafetySafety Interlock MonitoringCommunication MonitoringPNP Inputs24V DC Outputs

3. Packaging Line Actuator Control

On a packaging line, this module can receive signals from up to four sensors (e.g., product detection, position feedback) and control four small pneumatic valves or indicator lights (up to 1A each at 24VDC) for sorting, diverting, or signaling. Its compact G4 form factor and robust IP65 construction make it suitable for installation directly on the machine frame in areas subject to cleaning or spills.

Problem Solved

Efficiently managing local I/O for decentralized control on packaging machinery, allowing for direct installation in washdown or high-splash zones and providing reliable control of small pneumatic or electrical actuators.

Packaging AutomationDistributed I/OIP65 Protection24V DC ControlAS-Interface Network