Eltek Smartpack2, Руководство пользователя

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2 The Smartpack2 Master Controller
8
User's Guide Smartpack2 Master Controller
350020.013, Issue 2.0, 2014 Jan
CAN Bus Termination
To ensure a correct bus communication and avoid data reflection, you must always
terminate the CAN bus with two 120

resistors , one at each end of the line (60

bus
impedance).
Smartpack2 -based DC power systems are shipped from factory with the CAN bus already
terminated with 120

resistors. The CAN bus termination is implemented with a special
RJ45 plug with built-in 120

end-of-line resistor.
Figure 3 Example of CAN bus addressing and termination in a Flatpack2 power system with
Smartpack2 -based control system and several monitors connected the CAN bus
When connecting more CAN nodes to the bus , you have to remove the CAN bus
termination plug from one of the CAN bus ends, and plug it in one of the CAN ports on the
last connected CAN node.
CAN Bus Cabling
In addition to the two dedicated wires for communication, the CAN bus multi-wire cable
must integrate wires for the CAN power supply and other signals. In standard industrial
environments, the CAN bus can use standard cabling without shielding or twisted pair
wiring. If very low interference (EMI) is required, a CAT-5 twisted-pair cable is
recommended.
Flatpack2
DC Power System
CAN bus
(twisted-pair
CAT5 cable)
33
Battery string #1
Battery Monitor
ID Number
I/O Monitor2
81
Load Monitor
49
End-of-Line
Resistor
120

Fuses
Fuse Monitoring
Configurable Inputs
Current Monitoring
Sense Inputs
Shunts
Alarm Outputs NC-C-NO
Config. Inputs
End-of-Line
Resistor
120

Smartpack2
Basic Controller
Flatpack2 HE
Rectifiers
01 02 n
1
Internal System Monitoring
Smartpack2
Master Controller
Ethernet cable (LAN)
CWUI
(Controller’s web-based user interface)
I/O Monitor
82
Alarm Outputs NC-C-NO
Config. Inputs
Temp, Fan Speed Mon & Ctrl