Application With Y-Switches; Output Current; Output Characteristics By Using Y-Switch - Cedes ELS 300 Installation And Operation Manual

Installation and operation manual
6.

Application with Y-switches

Warning: This application must not be used for Cat. 2 applications, according EN ISO 13849-1:2015.
Through the use of Y-switches, the wiring will be simplified. The outputs of the connected Rx will be summarized
to one output-signal. It will almost be like a customized light curtain with a single output signal.
Interconnection
0.25 m
Interconnection
0.25 m
Rx cable 5 / 10 / 20 m
Figure 7: ELS 300 network connection diagram
6.1.

Output current

The max. output current depends on the network. If the output of one ELS 300 Rx in the network is active, the
status LEDs of all other Rx in the network light up.
Because of this, the output current depends on the number of connected Rx and of the Y-switch used.
Max. output current
50 mA - (n
n = Number of Rx (max. 7)
Rx
n = Number of Y-switches with LED
YLED
6.2.

Output characteristics by using Y-switch

Uninterrupted
Light beam
System 1
Light beam
Uninterrupted
System 2
Light beam
Uninterrupted
System 3
HIGH
Output ELS 300
LOW
Rx- PNP/DO-...
Ausgang ELS 300
HIGH
Rx- NPN/DO-...
LOW
Output ELS 300
HIGH
Rx- PNP/LO-...
LOW
HIGH
Output ELS 300
LOW
Rx- NPN/LO-...
Figure 8: ELS 300 output characteristics
© CEDES/October 2016
Rx cable 5 / 10 / 20 m
Out
Brown Blue Black
=
x 2 mA + n x 2.5 mA)
Rx YLED
Uninterrupted
Inter-
rupted
Uninterrupted
Inter-
rupted
Inter-
rupted
For PNP-networks, there is a Y-switch with
a green LED for power control and an
amber LED for showing the output state
Interconnection
available. This Y-switch with LEDs can
0.25 m
only be used with PNP-types.
Interconnection
Important:
0.25 m
In one network, all Rx have to be from the
same type (e.g. ELS 300 Rx-PNP/DO-N)
Example - calculation of max. output current:
Network with six sensors as in Figure 7
è 50 mA - (6 x 2 mA + 4 x 2.5 mA)
28 mA = max. output current
Inter-
rupted
Inter-
rupted
Uninterrupted
Inter-
rupted
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Output
Output 1 or Output 2 or
DO types
Output 3
Output 1 and Output 2 and
LO types
Output 3
ELS 300
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