Connectors and Controls
Each Bus Probe has a detachable terminal block with four terminals: ground (GND), power (+V), as well as the RS485+ and RS485– lines of the RS485 signal pair.
- BP#05 has an additional detachable terminal block with two terminals for connecting its companion sensor cable.
By default, the RS485 port operates at 38,400-8-N-1.
- Starting from firmware version V1.02, the baudrate is user-configurable.
- Starting from firmware version V1.06, the parity is user-configurable.
- If two stop bits are required, the parity can be set to the mark mode, which is equivalent to 8-N-2 (8 bits of data, no parity, and two stop bits).
When using an RS485 bus of substantial length, do not forget to add 120Ω termination resistors on both ends of the bus (see Note 1 in the diagram).
The MD button* has two uses:
Status LEDs display a number of device states and errors.
Mounting holes can be used to attach Probes to flat surfaces.
* Each Bus Probe comes with a metal pin that makes pushing and holding down the MD button easier.