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Troubleshooting
2-14 CAN USB-232 User Manual
2.2.10 CAN Driver
The ISO1050 is a galvanically isolated CAN transceiver that meets or exceeds the specifications of the ISO
11898 standard. The device has the logic input and output buffers separated by a silicon oxide (SiO2)
insulation barrier that provides galvanic isolation of up to 5000 VRMS for ISO1050DW and 2500 VRMS
for ISO1050DUB and ISO1050LDW. Used in conjunction with isolated power supplies, the device prevents
noise currents on a data bus or other circuits from entering the local ground and interfering with or
damaging sensitive circuitry.
As a CAN transceiver, the device provides differential transmit capability to the bus and differential receive
capability to a CAN controller at signaling rates up to 1 megabit per second (Mbps). Designed for operation
in especially harsh environments, the device features cross-wire, overvoltage and loss of ground protection
from
–
27 V to 40 V and over-temperature shut-down, as well as
–
12 V to 12 V common-mode range.
The ISO1050 is characterized for operation over the ambient temperature range of
–
55
°
C to 105
°
C.
2500-VRMS Isolation (ISO1050DUB and ISO1050LDW)
5000-VRMS Isolation (ISO1050DW)
Failsafe Outputs
Meets or Exceeds ISO 11898 requirements
Bus-Fault Protection of –27 V to 40 V
Dominant Time-Out Function
IEC 60747-5-2 (VDE 0884, Rev. 2) & IEC 61010-1 Approved
UL 1577 Double Protection Approved
IEC 60601-1 (Medical) and CSA Approved
5 KVRMS Reinforced Insulation per TUV
Approved for EN/UL/CSA 60950-1 (ISO1050DW)
Typical 25-Year Life at Rated Working Voltage