Allen-Bradley 2755 User Manual download pdf (Page 51)

Installing the Wiring Base and Power Supply 3–16

For network wiring, the wiring base has two DeviceNet terminal

blocks; one for incoming power and communications, the other for

outgoing power and communications. DeviceNet communications

requires 3 wires (2 communications, 1 ground) and a shield. You can

install the Reader in a single or multiple drop configuration. Up to 63

slave devices can be installed on a single DeviceNet master/slave

network. Up to 32 Readers can be installed on a DeviceNet

peer-to-peer network.

Reader

Other Devices

Reader Reader

Both DeviceNet terminal blocks are tied to each other. You can

connect the wiring to either terminal block. Use cabling (Catalog

No. 1485C-P1A50, -P1A150 or -P1A300) for all DeviceNet

connections.

Line

Termination

V+

Can_H

Shield

Can_L

V-

V+

Can_H

Shield

Can_L

V-

See DeviceNet Cable System Planning and Installation Manual

(Publication No. 1485-6.7.1) for recommendations and cable

accessories.

Line Termination

The two devices furthest apart from each other on a DeviceNet

network must be terminated. A termination switch is provided.

Only the devices at the ends of the network can be terminated.

Dev

ceNet

Connect

ons

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Allen-Bradley 2755 User Manual Page 51