KEBA KeConnect AM 28x/x Analog hybrid modules

Product features

•  4 analog inputs

•  4 analog outputs

•  Signal form: Voltage or current

•  Sensor failure detection

•  Resolution of the outputs up to 14 bit

•  Electronic parameter chip

Short description

The AM 28x/x series is a hybrid module and enables the connection of four analog inputs and four analog outputs with

voltage or current signals. The analog inputs of the AM 28x/A process both single-ended as well as differential voltage

signals. The AM 280/B is equipped with current inputs and outputs.

A sensor failure, should it occur, is reported to the higher-level CPU module and can be evaluated accordingly in the

application. These modules are attached directly to a CPU module or can be operated with all KEBA controls by means

of bus couplers.

Analog inputs

AM 280/A AM 282/A AM 280/B

Number of inputs 4 4 4

Type Voltage input Voltage input Current input

Resolution 14 bit 16 bit 14 bit

Signal range ±10 V or 0 – Uref (10 V) ±10 V or 0 – Uref (10 V) 0 – 20 mA or 4 – 20 mA

Max. measurement signal ±10.4 V ±10.4 V-0.8 mA … 20.8 mA

Input type Differential or single-ended Differential or single-ended Differential

Galvanic isolation No No No

Reference voltage output 10 V ±2.5 %; max. 20 mA 10 V ±2.5 %; max. 20 mA

Scan repeat cycle 1 ms 1 ms 1 ms

Input impedance in signal range 10 MΩ 10 MΩ < 200 Ω

Input filter characteristic First order First order First order

Limiting frequency of the input filter 250 Hz 250 Hz 250 Hz

Conversion method Successive approximation Successive approximation Successive approximation

Monotonicity without error codes Yes Yes Yes

Common mode range ±13.5 V ±13.5 V ±13.5 V

Common mode rejection ratio > 80 dB > 80 dB > 80 dB

Value of the lowest bit (LSB) 1.3 mV 1.3 mV 1.35 μA

Maximum permitted continuous load

(without damage) ±30 V

Typ. temp. coefficient measurement error ±5 ppm of scale end value / °C

Max. temp. coefficient measurement error ±20 ppm of scale end value / °C

Largest error at 25 °C ±0.01 % of scale end value

Analog outputs

AM 280/A AM 282/A AM 280/B

Number of outputs 4 4 4

Type Voltage output Voltage output Current output

Digital resolution 12 bit 14 bit 12 bit

Signal range ±10 V ±10 V 0 – 20 mA

Galvanic isolation No No No

Conversion cycle 1 ms 1 ms 1 ms

Value of the lowest bit (LSB) 5.32 mV 1.33 mV 5.39 μA

Monotonicity Yes Yes Yes

Load resistance ≥ 1000 Ω ≥ 1000 Ω ≤ 600 Ω

Largest capacitive load ≤ 10 nF ≤ 10 nF

Differential non-linearity ≤±1 LSB

Settling time when changing over the full

range (with ohmic load) ≤ 50 μs

Typ. temp. coefficient analog output error ±20 ppm of scale end value / °C

Max. temp. coefficient analog output error ±30 ppm of scale end value / °C

Largest error at 25 °C ±0.15 % of scale end value

Dimensions, weight

Height 120 mm

Width 22.5 mm front plate / 32.5 mm incl. plug

Depth 100 mm

Weight 135 g