High Speed Analogue Input Module (HSA)

High Speed Analogue Input Module (HSA)

EKE Trainnet® HSA Front EKE Trainnet® HSA 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
170 g
Input Power:
5 V DC ± 5 % (1 A typ. 3 A max.)
Temperature Range (operational):
-40 °C…+70 °C
MTBF (40 ºC ambient temperature):
390 000 h (HSA2620A)
I/O Connector:
DIN41612-F48 (at front)
Host Interface:
VME Bus A24/D08/D16 Slave
Input Channels, Analogue:
4 voltage channels, -10…10 V (Vin)
4 current channels,-20…20 mA (Iin)
Input Channels, Frequency:
4 input channels
Frequency Input Voltage Range:
0…36 V DC
Frequency Input Threshold level:
Each channel has its own software configurable threshold level, fixed hysteresis
Frequency Input Range:
DC to 16 kHz, 0.25 Hz resolution
Frequency Input Pulse Width Measurement:
0.1% resolution
Tachometer Supply Outputs:
15 VDC, max. 70 mA each


The Trainnet® High Speed Analogue Input Module (HSA) provides a standard interface for analogue input signals. Signals can be current (-20…+20mA) and voltage (-10…10V). Separate channels are provided for frequency signal measurements with the capability to measure pulse-width ratio (PWM). The Trainnet® HSA converts the analogue signals and makes them available to the train computer's CPU Module.

The Trainnet® High Speed Analogue Input Module can be used as a part of a Trainnet® TCMS, VCU or Event Recorder.


The Trainnet® HSA has 4 current channels and 4 voltage channels divided in four isolated groups. 4 frequency channels are also available.

The 4 current measurement channels can measure currents between -20 and +20 mA. The module has the capability to supply voltage to external sensors or to supply loop voltage to the current loops.

The module 4 voltage measurement channels can measure voltages between -10 and +10 V. The resolution of the input A/D conversion is sign+12 bits, and the cut-off frequency of the hardware low pass filter is 150 Hz. Both current and voltage channels are capable of giving over range indications which can be used for diagnostic purposes.

The 4 frequency input channels can measure frequencies up to 16 kHz, period, pulse width, pulse count and rotary decoding with direction indication (compatible with most industry standard tachometers).

The module has its own 32-bit Floating point Digital Signal Processor for a high signal processing capability and uses factory calibration values to convert the measurement value to mV or µA with great accuracy. The embedded DSP processor can be used to perform signal processing tasks like filtering. It also implements diagnostics functions and reports to the system CPU module if it suspects that the input values cannot be trusted.

sil-2 certified

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

Published on: 2017-03-02
EKE-Electronics Ltd
Piispanportti 7
02240 Espoo
Tel +358 9 6130 30