Analogue Ouput Module (AOM)

Analogue Output Module (AOM)

EKE Trainnet® AOM Front EKE Trainnet® AOM Side


EN 50126

EN 50128

EN 50129

EN 50155

EN 45545

Dimensions (W x H x D):
4 TE x 3 U x 160 mm
165 g
Input Power:

5 V DC ± 5 % (1 A typ., 3A max.)
Temperature Range (operational):
-40 °C…+70 °C
MTBF (40 ºC ambient temperature):

910 000 h
I/O Connector:

DIN41612-F48 (at front)
Host Interface:
RS 485
Current Output Mode:

4…20 mA
1 µA resolution
Voltage Output Mode:
-10…+10 V
1 mV resolution
Analogue Output Channels:
16 (in 4 groups of 4 isolated channels)

PWM Outputs:
8 (2 in each of the 4 groups)
Selectable base frequency 10 Hz to 10 kHz
Pulse width adjustable with 0.1% resolution
Output level 15 V

module functions

The Trainnet® Analogue Output Module (AOM) provides a standard interface for analogue output signals. The Trainnet® AOM receives instructions from the train computer's CPU Module and sends analogue signals to sub-systems accordingly.

The Trainnet® AOM can be used as a part of a Trainnet® TCMS, VCU or Event Recorder. Alternatively, the Trainnet® AOM can be fitted into the Trainnet® Remote I/O Module (RIOM).

key features

The module has 4 individually isolated analogue output groups. All groups are identical and have 4 analogue output channels. Each group has two PWM outputs.

By default, 2 channels are configured as current loop transmitters with integrated loop supply (current mode) and 2 channels as bipolar voltage output and two digital pulse width modulation outputs (voltage mode). The channel configurations can easily be changed from current mode to voltage mode and vice-versa, depending on your needs. The Trainnet® AOM is able to provide current loop supply voltage internally: there is no need for an external power supply. Configurable ranges are from 4 to 20 mA for current and from -10 to +10 V for voltage.

Each output channel has parameters for calibration (factory set), and diagnostics to detect short or open in current loop and short in voltage output. Outputs are factory calibrated.

The module has its own 32-bit embedded processor to manage serial communication with the train computer's CPU module.  The embedded processor also implements diagnostic functions and reports to the system CPU module if it suspects that the output values cannot be trusted.

The module has an RS 485 serial bus interface for connecting to the train computer.

sil-2 certified

The development of module AOM3371A is based on railway standards EN 50126, EN 50128 and EN 50129 that are in accordance with safety integrity level SIL 2. A non-SIL certified module version AOM2610A is also available.

Published on: 2020-08-10

EKE-Electronics Ltd
Piispanmäentie 5
02240 Espoo
Tel +358 9 6130 30