Burkert Type 8691 - Manual (Page 44)

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DeviceNet
11 DeViceneT
11.1 Definition
• The DeviceNet is a field bus system which is based on the CAN protocol (Controller Area Network). It enables
actuators and sensors (slaves) to be networked with higher-level controllers (master).
• The control head in the DeviceNet is a slave device according to the Predefined Master/Slave Connection Set
stipulated in the DeviceNet specification. Polled I/O, Bit Strobed I/O and Change of State (COS) are supported
as an I/O connection variant.
• With DeviceNet it is necessary to differentiate between cyclical or event-driven high-priority process messages
(I/O Messages) and acyclical low-priority management messages (Explicit Messages).
• The protocol process conforms to the Devicenet specification release 2.0.
11.2 Technical data
EDS file BUE8691.EDS
Icons BUE8691.ICO
Baudrate 125 kbit/s, 250 kbit/s, 500 kbit/s (via DIP switches);
Factory setting: 125 kbit/s
Address 0 – 63 (via DIP switches);
Factory setting: 63
Process data 1 static input assembly (input: from the control head 8691 to the DeviceNet Master/Scanner)
1 static output assembly
11.3 maximum line lengths
The maximum total line length (sum of trunk lines and drop lines) of a network depends on the baudrate.
11.3.1 Total line length according to Devicenet specification
Baudrate
maximum total line length 9)
thick cable thin cable
125 kbaud 500 m
100 m for all baudrates 250 kbaud 250 m
500 kbaud 100 m
Table 12: Total line length
9)
According to DeviceNet specification.
If a different cable type is used, lower maximum values apply.
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Type 8691