Bender EDS440-L - Digital Outputs of the Eds44 X-L

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EDS44x_D00201_07_M_XXDE/06.2020
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10.2.2 Digital outputs of the EDS44x-L
The EDS44x-L features a digital current output (0 or 20 mA), a buzzer and relays, which
can be configured individually.
10.2.2.1 TEST function
The function test checks the switching functions of the digital outputs. This only applies
to the manual test and not to the cyclic device self test.
10.2.2.2 Operating mode of the relays
The relay mode can be adapted to the application:
10.2.2.3 Digital current output (M+)
Connection example of the digital output
The digital current output is located at M+ of the X1 plug.
If a function is assigned and active, the digital current output carries 20 mA. Otherwise no
current (0 mA) is carried.
• N/C Normally closed - N/C operation contacts 13-14 / 23-24
(The alarm relay is energised in normal operation).
• N/O Normally opened - N/O operation contacts 13-14 / 23-24
(The alarm relay is de-energised in normal operation).
PLC
(SPS)
IN
I1 I2 A B
AB
M+
10.2.2.4 Functional description
Up to three functions can be assigned to one output. The functions are linked to an OR
operator:
The following output functions are possible:
• off The function is not used.
•I
∆L
The status of the output changes if an insulation fault is detected
(EDS function) on one of the measuring channels.
•I
∆N
The status of the output changes if the residual current (RCM func-
tion) is exceeded.
• Device error The status of the output changes in the event of an internal device
error.
• Connection fault The status of the output changes when one of the following meas-
uring current transformer connection faults occurs:
• Measuring current transformers defective
• Power supply cable interrupted
• Power supply cable short-circuited
• Common alarm The status of the output changes on the occurrence of any alarms
and fault messages (I
∆L
alarm, I
∆n
alarm, connection and device
error).
• Insulation fault location
active (for buzzer only)
The buzzer signals active insulation fault location.
• BS bus malfunction
(not for buzzer)
Message in case of a faulty BS bus connection
• No master available
• A/B interchanged
•A/B short-circuited
•A/B separated
≥ 1
Response
Function 1
Function 2
Function 3