8-channel digital input terminal NAMUR, Ex i ELX1058
Signal LEDs
Error LED
Power contact
+24 V EX
Power cont. 0 V EX
Input 1 
Input 2 
Input 3 
Input 4 
Input 5 
Input 6 
Input 7 
Input 8 
Top view 
extended temperature range

ELX1058 | 8-channel digital input terminal NAMUR, Ex i

The ELX1058 digital input terminal acquires signals from NAMUR field devices according to IEC 60947-5-6. The sensors are supplied with a voltage of 8.2 V and return a diagnosable current signal. In this way, a wire breakage or short circuit can be detected in addition to the switching state. The LEDs indicate signal or any error states, channel by channel.

By software, it is possible to select channel by channel whether a positive switching or negative switching sensor is to be connected. Thus, no changes to the PLC are required for the connection of both NAMUR break contacts or make contacts. The red error LEDs can be switched off, which allows the connection of dry contacts without signaling an error.

Technical data ELX1058
Technology NAMUR DC switching amplifier
Specification IEC 60947-5-6
Number of inputs 8
Connection method 2-wire
Open circuit voltage typ. 8.2 V DC
“0” signal current ≤ 1.2 mA
“1” signal current ≥ 2.1 mA
Switching hysteresis typ. 300 µA
Short-circuit current typ. 7 mA
Fault detection I ≤ 200 µA (cable break), I ≥ 6.3 mA (short circuit)
Max. switching frequency 1 kHz
Supply voltage electronics 24 V DC (via power contacts), ELX9560 power supply
Current consumption power contacts typ. 15 mA + load
Current consumption E-bus typ. 70 mA
Distributed clocks
Weight approx. 55 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/see documentation
Approvals/markings CE, UL, ATEX, IECEx
Ex marking ATEX:
  II 3(1)G Ex ec [ia Ga] IIC T4 Gc
  II (1)D [Ex ia Da] IIIC
  I (M1) [Ex ia Ma] I
  Ex ec [ia Ga] IIC T4 Gc
  [Ex ia Da] IIIC
  [Ex ia Ma] I
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