Datasheet

©UniSwarm 2021 - UDT1FR-I
2021/05/19 UDS6001A 4
1.3 Electrical
1.3.1 Power input
The board is powered through the USB type B connector. This port is used to power the board and communicate to a
computer with a maximal speed of 480 Mbit/s.
Connector J102, USB
Pins Name Description
1 Vbus 5V 500mA power
2 DATA-N USB data+
3 DATA-P USB data-
4 GND Ground
5 Shield Shield ground connected
Figure 1.2: J102 pins
Recommended connector references
Standard USB type B cable
1.3.2 Buses
Both buses (RS485 and CAN Fd) have 30 kV Electrostatic Discharge (ESD) protection and high quality filters for noisy
environment.
A full 1kV isolation is present between bus-side and power-side to prevent damage and avoid noise to propagate through
the bus.
The bus use a dual RJ45 so cket (J203 connector). Both ports are connected together, to daisy chain the bus without
external Y cable or adapter.
Thanks to it’s two ports the UDT1FR-I can be used in line or in termination of the bus. If the board is at the end of
the network, it is necessary to add a 120 Ohm line plug on the unused port.
The speed of both buses can be set by software.
The CAN Bus can reach 8 Mbps and the RS-485 can reach 50 Mbps.
Connector J203, CAN Fd / RS485
Pins Name Description
1 CAN H CAN Fd dominant
2 CAN L CAN Fd recessive
3 GND Ground, connected to 7
4 RS485 B RS485 B side
5 RS485 A RS485 A side
6 - Unused, but pins 6 of two connectors are connected together
7 GND Ground, connected to 3
8 - Unused, but pins 8 of two connectors are connected together
Figure 1.3: J203 pins
Recommended connector references
Standard straight RJ45 cable.