Samson TROVIS 5571 Mounting And Operating Instructions page 31

Electrical connection
Connecting the PLC
Open the housing to connect the cables. Make holes in the marked locations at the top, bottom
or back of the housing's back panel and fit suitable grommets or screw joints.
Observe the diagram (Fig. 4) for connection. The connection diagram contains all possible in-
puts and outputs. The assignment of the corresponding inputs and outputs is determined by the
respective application.
Inputs
When wiring the universal inputs (BE1/AE1 to BE17/AE17), make sure to use terminal 13 as
ground in case of active inputs (current and voltage inputs). If the universal inputs are used as
passive inputs (sensors or binary inputs), terminal 10 must be used as ground.
Binary inputs with terminal 10 functioning as ground (GND) are slow (a delay of approx. 3 sec-
onds).
Binary inputs with terminal 9 functioning as ground (GND) are fast (ms).
Outputs
The binary low-voltage outputs (BA1 and BA2) are used for signaling. As a result, only a mini-
mal load can be applied to these outputs (50 V DC, max. 100 mA ohmic load). If greater loads
are to be applied, it is recommended to control relays over the outputs which then switch the ele-
vated load.
The 10 binary outputs (BA3 to BA12) can be loaded with max. 250 V AC, 2 A.
Modbus
The control station is connected over a serial RS-232 interface at the back of the controller.
Further Modbus instruments (slaves) are connected to the PLC over the RS-485 interface
(terminals 1 and 2).
Connecting the sensors
Cables with a minimum cross-section of 2 x 0.5 mm² can be connected to the terminals at the
back panel of the housing.
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EB 5571 EN