User`s manual

Western Reserve Controls WRC-CANX-xx Series 3
PUB 14.0 User’s Manual
11
Table 5-4 Diagnostic Status LED’s (labeled DGN)
LED State Module Status Meaning
OFF Normal operation
No Power, or
Normal Operation with power applied.
5.4. Power Requirements
The WRC-CANX-XX CAN-Bus Extender subsystem is powered from the 11-25 Vdc provided by the
DeviceNet network. The WRC-CANX consumes 70 mA of current at 24 Vdc, or 1.8 Watts, typical. See
Section 4.
Power is typically taken from the bus on each side and each side (A and B) requires power. Power
applied to the A Side powers the entire unit except the B Side isolated transceiver. If isolation is not
required for your application, then the power line may be jumpered from side A to side B. Care must be
taken that the power supply is capable of handling the entire load on both sides of the CANX.
5.5. Network Cabling and Configuration
This section provides general guidelines for connecting DeviceNet and SDS systems. You can find
detailed specifications in the appropriate ODVA DeviceNet and Honeywell SDS specifications.
5.5.1. Cable Lengths
The following provide cable length limits for DeviceNet and SDS systems.
Table 5-5 Network Maximum Lengths - DeviceNet
Baud Rate Trunk Line Length Drop Length
Maximum Distance Maximum Cumulative
Meters Feet Meters Feet Meters Feet
125 Kbits/s 500 m 1640 ft 6 m 20 ft 156 m 512 ft.
250 Kbits/s 250 m 820 ft 6 m 20 ft 78 m 256 ft.
500 Kbits/s 100 m 328 ft 6 m 20 ft 39 m 128 ft.
DeviceNet has a limit of 64 nodes per network for any baud rate. The CANX does not count as an
addressed device.