Electrical installation
Wieland Electric GmbH | BA000966 | 07/2016 (Rev. C)
Electrical installation
888523019
Requirements for electrical installation
888524555
This section describes the electrical installation of the samosPRO system in the switchbox. You
can find additional information on the electrical connection of other devices to the samosPRO
system in the section on the respective device (see
Product description [ch. 2.5.2, p. 13]
).
Safety information
Switch off power to the entire system/machine!
It is possible for the system to be unintentionally started while you are connecting the de-
vices.
ATTENTION
Note the corresponding safety standards!
All of the safety-related parts of the system (wiring, connected sensors and command en-
coders, configuration, device monitoring) must meet the respective standards (e.g. EN 62061
or EN ISO 13 849-1). This can mean that the safety-related signals must be designed redun-
dantly or that single-channel signals must be routed in a protected manner, or that short-
circuit detection will be required through the use of test outputs and/or regular function tests.
• Note that short-circuit between test outputs and the corresponding input cannot be de-
tected.
• Consider whether a shielded cable or separate line routing will be required for these sig-
nals.
• In the event of a short-circuit to 24 V at an output, it will no longer be possible to switch
off the output.
• Reverse current to a switched-off output of an SP-SDIO cannot be prevented and will
influence the ability to switch off the outputs.
ATTENTION
Limited short-circuit detection in the input circuits
• One SP-COPx has four test signal generators T1 – T4.
• One SP-SDI has two test signal generators. One test signal generator is responsible for
the odd-numbered test outputs (X1, X3, X5, and X7), while the other is responsible for
the even-numbered test outputs (X2, X4, X6, and X8).
• Short-circuits between test signal generators of an SP-SDI or SP-SDIO expansion module
are detected. Between different modules the short circuit detection is then only ensured
if the test gaps of the test signal generators are < 4 ms, the test periods ≥ 200 ms and no
more than 9 modules (SP-SDI / SP-SDIO) have been plugged in. Short-circuits after 24
V
DC (after High) at inputs that are connected to test outputs are detected independently
of the length of the test gaps.
• Please ensure that the odd-numbered test outputs (X1, X3, X5, and X7) at the SP-SDI are
connected to a common test signal generator and that the even-numbered test outputs
(X2, X4, X6, and X8) are connected to another common test signal generator. Therefore,
short-circuits between the odd-numbered test outputs (X1, X3, X5, and X7) cannot be de-
tected. The same applies accordingly to the even-numbered test outputs (X2, X4, X6, and
X8).
Make note of this during wiring (e.g. through separate routing or protected lines)!
ATTENTION
Reverse current at inputs of SP-COP, SP-SDIO, or SP-SDI with breakdown of ground!
In the event of an internal or external ground breakdown, reverse current can flow from the
supply voltage of the COMPACT module (terminal A2) to the safe inputs of the SP-COP, SP-
SDIO, or SP-SDI modules. Make note of this if other inputs are connected in parallel to these
inputs so that this reverse current does not lead to an unintentional high at the inputs
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