Modelec Data-Industrie B.V. -- Moxa SNMP I/O Solution

SNMP I/O Solution

Moxa's ioLogik E2000 Active Ethernet I/O products are intelligent SNMP I/O devices that support all versions of SNMP protocols, including SNMP v1, v2c, and v3. Active Ethernet I/O products are specifically designed for information field applications that use the SNMP protocol. Working together with the built-in Click&Go, the ioLogik E2000 series allows users to create an active SNMP trap to NMS. The ioLogik allows your monitoring system to be uncomplicated and available for managing all the devices on the Ethernet network.

Use a Simple Architecture to Manage All Devices on the Ethernet

Since Ethernet networks are already being used by many facilities, a data acquisition system made up of Ethernet devices is cost-effective and easy to implement. Moxa's Active Ethernet I/O products are SNMP compatible, making it easy to integrate them with an existing SNMP NMS to simplify your remote monitoring system. You can easily manage all of your Ethernet devices, such as switches, routers, and I/O servers to obtain all the environmental parameters.

Moxa's Push-based Active OPC Server
In addition to the standardized OPC Client/Server architecture, a new push-based OPC Server technology is now available for Ethernet-based data acquisition and SCADA applications.

1.	Simplify the Architecture of Your Remote Monitoring System
	Moxa's intelligent Ethernet I/O products are equipped with SNMPv3 capability to simplify the entire system since extra PCs or PLCs are not necessary.

2.	Single Supervisory Monitoring and Data Acquisition System
	Given that the standard SNMP protocol is used by the entire system, administrators do not need to install new software to get their I/O data. Both I/O devices and network devices can be controlled by centralized software.

Fully Compatible with SNMPv1/v2c/v3

The SNMP protocol is now used across a wide variety of platforms and network environments, and Moxa's SNMP I/O products support all three SNMP versions—v1, v2c, and v3. SNMP is used as a unified protocol to monitor the status and operation of a diverse range of equipment. No matter which version of SNMP protocol is being used by your existing NMS, Moxa's Active Ethernet I/O products can be employed with ease.

SNMP Trap Is a Change-of-State (COS) Message or Periodical Report

When a remote device records a local event, SNMP provides a trap message to notify the administrator at the central site. The event could be an alarm, a clear, or simply a status message. Since Click&Go is built into the ioLogik E2000, an SNMP trap can be sent when a pre-defined event occurs, or can be reported periodically by timer functions.

SNMP Trap Can Bind I/O Status Information

A standard SNMP trap has seven trap numbers, and each trap number represents a special event and trap ID. An SNMP NMS does not keep a standing alarm list, so it can be difficult to tell what is happening on your network by looking at a list of traps. The ioLogik E2000 also supports Moxa's private SNMP trap format, which is called variable binding. For example, the SNMP information may show "Door Open." It provides user more flexible alarming. The built-in intelligence I/O originates the SNMP Trap activity in real time. It is can be defined by user-defined event and message.

Secure Communication with SNMPv3

SNMPv3 introduced an encryption technology that prevents system crashes and is the most secure version of SNMP. SNMPv3 messages are safeguarded by encryption to protect them from intercept traps. SNMPv3 encrypts messages using CBC-DES encryption, which belongs to the Universal Security Model (USM).


1.	Authentication: Authentication is one of two types of security supported by SNMPv3. It is used to ensure that traps are only read by the intended recipient. As messages are created, they are given a special key that is based on the EngineID of the entity. The key is shared with the intended recipient and used to receive the message.

2.	Privacy: The second SNMPv3 security type encrypts the payload of the SNMP message to ensure that it cannot be read by unauthorized users. Intercepted traps are scrambled with garbage characters, rendering them unreadable by anyone but the intended recipient. Privacy is especially useful in applications where SNMP messages must be routed over the Internet.

An Advanced SNMP Trap Includes I/O Status with Alias Names

When an event occurs at the site, the SNMP issues a trap message to notify the administrator at the central site. Notification could be in the form of an alarm, a clear, or simply a status message. The trap message is generated by an agent (an application in SNMPv3) and sent to a manager. For standard SNMP traps, there are seven trap numbers, where each trap number stands for a special event and trap ID. Moxa's SNMP I/O provides an advanced SNMP Trap with binding I/O status. For example, the SNMP information may show "Door Open". It provides user more flexible alarming. The built-in intelligence I/O originates the SNMP Trap activity in real time. It is can be defined by user-defined event and message.

Creation and Maintenance of Systems Made Easy

SNMP is easy to implement. After compiling a private MIB file in the NMS, each SNMP device can be read from or written to by the NMS. In addition, SNMP devices are almost plug and play.