SEW-Eurodrive DH 41B Series - X34: COM 1;COM 2 (RS485) Engineering Interface

6
Electrical installation
Terminal assignment and DIP switches
Manual – DHE/DHF/DHR21B (standard) and DHE/DHF/DHR41B (advanced)
35
Assignment: CAN1 system bus interface
No. Name Function
X33 1 DGND Reference potential for system bus CAN1
2 CAN1H System bus CAN1 high
3 CAN1L System bus CAN 1low
Connecting the system bus
INFORMATION
• The CAN 2 system bus is electrically isolated. We therefore recommend to use
the CAN 2 ( X32) system bus interface for connecting field devices (e.g. CANopen
inputs and outputs).
• The CAN 1 system bus is not electrically isolated. We therefore recommend to
use the CAN 1(X33) system bus interface to connect inverters via the system bus
in the control cabinet.
• A CAN system bus interface is required for communication between
MOVIDRIVE
®
MDX61B and the integrated controller.
The CAN system bus supports transmission systems compliant with ISO11898. The
"Serial Communication" manual contains detailed information about the CAN system
bus. This manual can be ordered from SEW‑EURODRIVE.
Cable specification
• Use a 2 × 2-core twisted and shielded copper cable (data transmission cable with
braided copper shield). IEC 60999 does allow clamping without conductor end
sleeves. The cable must meet the following specifications:
– Cable cross section 0.2 mm
2
– 1.0 mm
2
(AWG24–AWG18)
– Cable resistance 120Ω at 1 MHz
– Capacitance per unit length ≤40pF/m at 1kHz
Suitable cables include CAN bus or DeviceNet cables.
6.2.8 X34: COM1/COM2 (RS485) engineering interface
Function
You can connect one of the following devices to the COM1/COM2 (RS485) engin-
eering interface:
• Gearmotor with integrated frequency inverter MOVIMOT
®
• DOP11B operator panel
NOTICE
• There must not be any potential shift between the devices connected via the
RS485. Take suitable measures to avoid potential shift such as connecting the
device ground connectors using a separate cable.
• Dynamic terminating resistors are installed. Do not connect any external ter-
minating resistors.
22900055/EN – 08/2016