LED displays
8
CANio 250 Quickstart Manual, version 1.2
3 LED displays
The CANio 250 has four two-colored LEDs (see Figure 2-1). The LEDs react
as follows according to the operating mode of the CANio 250.
3.1
PWR - LED
The Power-LED (PWR) is lit green when the CANio 250 is connected to the
power supply. The Power-LED (PWR) is lit red when the power supply is con-
nected with reverse polarity.
3.2
CAN - LED
The CAN-LED displays the status of the CANopen State Machine (green) and
the error status. In the 'CAN BUS OFF' status, no more communication is pos-
sible and the CAN - LED is permanently lit red.
3.3
USR 1/2 - LED
The User-LEDs (USR 1/2-LED) which can be freely programmed by the user,
can be switched via CAN messages. More information is given in chapters
5.1.4.
4 Description of functions
4.1
Introduction
The CANio 250 allows monitoring or setting of digital signals via a CAN net-
work.
4.2
Galvanic isolation
In the case of galvanic isolation, the ground of CAN (GND_CAN) is isolated
from the rest of the circuit.
The ground of the power supply [GND (-)] and of the digital and analog inter-
faces are connected to each other.
4.3
Digital outputs
In total, the CANio 250 supports up to 16, 5V CMOS compatible, digital in-
/outputs. The digital outputs can be switched or monitored with CAN messag-
es. More information is given in chapters 5.1.4.
The in-/output function can be selected in groups of 8. In this way, maximum
16 inputs, 16 outputs or 8 in-/outputs can be supported by the device.