Devicenet Communications Specifications - Omron NE1A Series Manual

Specifications
2-2-2

DeviceNet Communications Specifications

Item
Communications
protocol
Connection method
Baud rate
Communications
medium
Communications
distance
Communications power
supply
Connected nodes
Safety I/O
communications
(Pre-Ver. 1.0 Control-
lers)
Safety I/O
communications
(Controllers with unit
version 1.0 or later)
Standard I/O
communications
Message communica-
tions
Conforms to DeviceNet.
The multidrop and T-branch connections can be combined (for main line and branch lines).
500 kbits/s, 250 kbits/s, 125 kbits/s
Special cable with 5 lines (2 communications lines, 2 power lines, 1 shield line)
Baud rate
500 kbits/s
250 kbits/s
125 kbits/s
The numbers in parentheses are the lengths when Thin Cable is used.
11 to 25 VDC
63 nodes max.
Safety Master Function:
• Maximum number of connections: 16
• Maximum data size: 16 bytes input or 16 bytes output (per connector)
• Connection type: Single-Cast, Multi-Cast
Safety Slave Function:
• Maximum number of connections: 4
• Maximum data size: 16 bytes input or 16 bytes output (per connector)
• Connection type: Single-Cast, Multi-Cast
Safety Master Function:
• Maximum number of connections: 32
• Maximum data size: 16 bytes input or 16 bytes output (per connector)
• Connection type: Single-Cast, Multi-Cast
Safety Slave Function:
• Maximum number of connections: 4
• Maximum data size: 16 bytes input or 16 bytes output (per connector)
• Connection type: Single-Cast, Multi-Cast
Standard Slave Function
• Maximum number of connections: 2
• Maximum data size: 16 bytes input and/or 16 bytes output (per connector)
• Connection type: Poll, Bit-strobe, COS, Cyclic
Maximum message length: 552 bytes
Specifications
Maximum network length
100 m max. (100 m max.)
250 m max. (100 m max.)
500 m max. (100 m max.)
Section 2-2
Branch length Total length
6 m max. 39 m max.
6 m max. 78 m max.
6 m max. 156 m max.
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