Allen-Bradley devicenet modules in logix5000 control systems Manual Do Utilizador

Publication DNET-UM004A-EN-P - March 2004

15-2        Using POINT™ I/O Modules on a DeviceNet Network

To choose the device that connects your POINT I/O modules to the 
DeviceNet network, consider the following:

• total number of devices on the network
• type of devices on the network
• topology and length of the network
• current requirements of the POINT I/O modules

P

O 

I 

N 

T

I/
O

P

O 

I 

N 

T

I/
O

P

O 

I 

N 

T

I/
O

P

D

N

P

O 

I 

N 

T

I/
O

P

O 

I 

N 

T

I/
O

A
D
N

subnet

1 2 3

4

P

O 

I 

N 

T

I/
O

P

O 

I 

N 

T

I/
O

A
D

N

X

subnet

5

subnet

device

device

P

O 

I 

N 

T

I/
O

P

O 

I 

N 

T

I/
O

Block I/O

7 8

6

main DeviceNet network

• Each I/O module uses 

an address on the 
main DeviceNet 
network.

• Total current 

requirements of the 
I/O modules must be 
1.3A or less.

• Consolidates the I/O 

module into a single 
address on the main 
DeviceNet network.

• Total current requirements 

of I/O modules can be 
greater than 1.3A.

The subnet lets you:

• connect other types of 

DeviceNet devices to the 
subnet

• Place devices beyond the 

limits of the main 
DeviceNet network

If you are also using a 
POINTBlock I/O 
module, connect your 
other POINT I/O 
modules to that 
module.