Communication; Connection Options For Io-Link - Siemens 3RS2 Manual

Digital devices with IO-Link
6.3 Connection options for IO‑Link
The monitoring relays continue to function autonomously in spite of the IO-Link connection.
Parameters can be assigned locally at the device, independently of a higher-level control. As long
as the 24 VDC supply voltage is available, the monitoring relays will function if the controller fails
or is not yet available.
6.2

Communication

The communication between the digital basic unit with IO-Link and the sensor expansion
module is wireless by means of an infrared interface integrated in both devices.
6.3 Connection options for IO‑Link
The IO-Link device is connected to the IO-Link master via the removable terminal and supplied
with 24 V DC via this connection.
Hazardous voltage!
If voltages are too high, the IO-Link device can be damaged and electric shock can result.
Use only power supplies that comply with the requirements of protective extra-low voltage
(PELV in accordance with IEC EN 50178).
Hazardous voltage!
Will cause death or serious injury.
Turn off and lock out power before working on this equipment.
There are two options for supplying the monitoring relay with voltage via the control circuit:
Option 1: Connection to IO-Link master
Connect the IO-Link device to the master via the three cables L+, C, and L-. The IO‑Link device is
supplied with voltage via the 2 cables L+ and L-. The monitoring relay communicates with the
master via cable C.
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DANGER
DANGER
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002