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3 I/O groups each having 4 Inputs and 2 Outputs

Up to three high-speed input channels for pulse/frequency count

24 VDC and 110 VDC types

I/O connections either at rear or at front

Input and output channel filtering

Output short circuit protection

Emergency output

Advanced self diagnostics

The DIO module is an intelligent digital I/O interface module, which can be located in the Coach Computer or distributed within the coach. The module has its own 8-bit embedded processor and a serial bus interface.

The module’s 18 digital I/O channels are grouped into three groups. Each group has 4 input channels and 2 output channels,

and its own voltage and return signals.

Three of the input channels, one channel in each group, have a special high-speed feature, which may be used for pulse counting or frequency input.

The module’s embedded microprocessor controls the inputs and outputs. Each input channel has a parameter for filtering and each output channel has a parameter for update frequency. The values of these

The default value is 10 ms. The maximum frequency of high-speed inputs is limited to 1,5 kHz (fixed).

Output short circuit protection. If the output current exceeds its maximum value, the Short Circuit Protection shuts down the output. This shut-down-state prevails until the I/O group is switched off. The status of the Short Circuit Protection is visible from the I/O Bus (I/O-status register).

I/O indicators. The DIO module has a Status LED indicator for each input channel.

Self diagnostics. The module has a Self Test Function for inputs. Each input channel has an individual test circuit, which is used for real-time diagnostics of the channel. This test is carried out during power-on and repeated during normal operation.

The status of input testing is visible from I/O Bus (I/O-status register).

Additionally the module has normal poweron self-tests for memories.

I/O connections. The module has two configurations, one configuration for I/O connections at rear, and the other for I/O connections at front. Both configurations have similar I/O functionality, but the front confi-guration doesn’t have the module status indicator or the I/O indicator LEDs.

parameters can be changed via the Test Interface. For the Coach Computer the module has an SDLC-type serial bus interface.

DIMENSIONS: 4 TE x 3 U x 160 mm (W x H x D), weight 179 g

INPUT POWER: 5 VDC +- 5% (500 mA max, 200 mA typ)

MTBF: 400 000 h (25°C)

TEMPERATURE RANGE: Operational -40 °C...+70 °C

I/O CONNECTOR: DIN41612-D (at rear) or DIN41612-F (at front)

I/O BUS: RS485, SDLC/Modbus 375 kbps

TEST INTERFACE: RS232C, asynchronous 19.200 bps

I/O RATINGS 24 VDC110 VDC

Absolute max. voltage: 34 VDC 154 VDC

Absolute max. output current: 3A 3A

INPUT CHANNELS 24 VDC110 VDC

Input voltage (high): 11,5...30 VDC 11,5...138 VDC

Max. input voltage (low): 8 VDC 8 VDC

Input (Wetting) current: 12 mA 2 mA

Input type: current sink

Input filtering: configurable 10ms ... 2,5s

High speed channels: max. 1,5 kHz

OUTPUT CHANNELS 24 VDC110 VDC

Current rating: 1 A 1 A

Min. output voltage (high): 12 VDC 74 VDC

Output type: current source (transistor)

Voltage drop: max. 2 V

Output filtering: configurable 10 ms ... 2,5 s