1791DS-IB8X0BV4 Allen-Bradley Guard I/O DeviceNet Safety Modules

1791DS-IB8X0BV4 Allen-Bradley Guard I/O DeviceNet Safety Modules

Product information：

Brand：Allen-Bradley                              Model number：1791DS-IB8X0BV4   

Condition：new                              Warranty: 12 month

Lead Time：3-day working da        Country of origin: United States

Price: Please contact us                   Product weight：0.355kg

HS: 8517623990

Product technial information：

The purpose of the safety network number (SNN) is to make sure that every 

module in a system can be uniquely identified.

For example, assume there are two identical GuardLogix control systems—

System A and System B—that are connected to a common Ethernet network. 

System A and System B have three DeviceNet networks with assorted standard 

and safety I/O modules. In systems like this, modules can have the same node 

number, but if each DeviceNet network has a unique SNN, each node will not 

have the same SNN and node number combination.

Another example of the usage of SNNs is when 1756-DNB modules are in the 

same chassis and the DeviceNet cables are inadvertently disconnected. If the 

cables are reattached incorrectly, the connection in the safety modules are broken 

because each 1756-DNB module is now connected to devices with different 

SNNs.

We suggest that all safety modules on a network have the same SNN, to make 

documentation easier. During configuration, the Logix Designer application.

software defaults a safety device’s SNN to match the SNN of the lowest safety 

node on the network.

The safety connection between a controller and I/O module is based on many 

items, one of which is the SNN of both devices. They do not have to match for a 

safety connection to be established, but the connection will be broken if the SNN 

of either device changes.

The safety network defaults to match the SNN of the lowest node on the 

network. If your safety controller is the lowest node on the network, then all of 

the safety I/O modules on the network will have the same SNN as the controller. 

As this is the recommended method of configuring the SNN, you may not need 

to do anything more with the SNN.

Delivery information：

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Transport: In Stock Ready for Shipment via DHL, TNT, FEDEX, UPS, ARAMEX and etc

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Contact information：

Contact person：Luna Chen

Email Address:：sales6@saulplc.com

WhatApp： +86 13358378970

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