Devicenet Installation; Definition; Technical Data; Maximum Line Lengths - Burkert 8695 Operating Instructions Manual

11

DEVICENET INSTALLATION

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 BUE8695.EDS
Icons BUE8695.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 8695 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
125 kbaud
250 kbaud
500 kbaud
Table 12: Total line length
According to DeviceNet specification.
8)
If a different cable type is used, lower maximum values apply.
48
Maximum total line length
Thick cable
500 m
250 m
100 m
english
8)
Thin cable
100 m for all baudrates
Type 8695
DeviceNet installation