Berger Lahr WS5-5 Series - Wiring of the Signal Interfaces

2.4.6 Wiring of the signal interfaces
The WS5-5 is activated by an external controller via
signal interface 1 and/or 2.
The two interfaces differ with respect to their pin as-
signments (see Figures 2-8 and 2-9) and the inter-
nal input connections with the signal levels (see
Figures 2-10 and 2- 12).
Signal interface 1
The input signal level of signal interface 1 corre-
sponds to the RS 422 standard value (see section
1.4.1.3). The drive may be achieved, for example,
by a Siemens PLC IP 247 or IP 267 stored-program
controller.
NOTE
Because of the high-impedance
RS 422 interface inputs, up to 10 units
can be connected in parallel on the
input side.
CAUTION
If an input of the RS 422 interface is
not used, the +input of the appropriate
signal can be connected to earth
(GND) in order to ensure resistance to
interference.
NOTE
The inputs of the RS 422 interface
may also be driven via open-collector
outputs; for the possible connections,
see Figure 2-11. The resistance to in-
terference depends on the respective
circuit configuration; the line length as
specified in the RS 422 standard is not
usually reached.
Signal+
Signal-
Signal+*
Signal-*
Signal-*
Signal+*
Signal-
Signal+
GND
R**
R**
R**
R**
GND
GND
GND
Plusswitching
non-inverting
Plusswitching
inverting
Minusswitching
non-inverting
Minusswitching
inverting
10-30V
10-30V
10-30V
10-30V
Becauseofinternalwiring,open inputsassumealevelof5V.
R=2.4kΩ for24Vsupplyvoltage
*
**
Installation
WS5-5 Doc. no. 211.347/DGB 03.96 2 – 7
+
+
+
U
S
U 33 V
I
L
= 10 mA
100 Ω
1, 2, 3, 4
9, 10, 11, 12
8
15
+ 5 V
U
S high
= 0,1 V à 30 V
U
S low
= -0,1 V à -30 V
R
i
≥10 kΩ
Inputs
Outputs
Figure 2-10 Internal wiring of signal interface 1