Electrical installation: input / output 73
USB interface
Location: U1
The USB connector is used to connect the MicroFlex e150 to a PC running Mint
WorkBench. The MicroFlex e150 is a self-powered, USB 2.0 (12 Mbps) compatible
device. If it is connected to a slower USB 1.0 host PC or hub, communication speed
will be limited to the USB 1.0 specification (1.5 Mbps). If it is connected to a faster
USB 2.0 ‘high-speed’ (480 Mbps) or USB 3.0 (5 Gbps) host PC or hub,
communication speed will remain at the USB 2.0 specification of the MicroFlex e150.
Ideally, the MicroFlex e150 should be connected directly to a USB port on the host
PC. If it is connected to a hub shared by other USB devices, communication could be
affected by the activity of the other devices. The maximum recommended cable
length is 5 m (16.4 ft).
RS485 interface
Location: X6
The RS485 interface is used to connect third-party serial devices such as operator
panels and PLCs. The interface can operate in 2-wire or 4-wire RS485 mode, which
is selected using the Configuration tool in Mint WorkBench. The default mode is 2-
wire RS485, 57600 Baud, 8 data bits, 1 stop bit with no parity. MicroFlex e150
supports various protocols over the RS485 interface, such as Modbus RTU and HCP
(Host Comms Protocol), as well as simple ASCII character handling.
The 7 V supply on pin 4 is provided for future accessories, so care should be taken to
ensure this supply will not damage connected devices. The RS485 port could be
damaged if a USB plug is accidentally inserted while the drive is powered.
Connections to a 2-wire RS485 device - ABB AC500-eCo PLC shown:
MicroFlex e150ABB AC500-eCo PLC
RxD/TxD-P
3
5
8
1
3
2
TXA(+)/RXA(+)
SGND GND
RxD/TxD-N TXB(-)/RXB(-)
COM1 X6
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