6
32
Devices per ISD chain
The problem
One cell, several separate safety systems
The reason for the stop is invisible
A relay and a cable for every device
The light curtain, gate switch and buttons often end up on different relay modules. The cabinet fills with modules and wiring runs in from every corner of the cell.Resetting happens at the cabinet
Solution
Complete safety coverage for a robotic palletizing cell, using hybrid I/O and In-Series Diagnostics on one RSio block.
The perimeter on the first input
The S4B safety light curtain guards the open side of the cell on one RSio safety input. The transmitter and receiver pair works up to 12 m apart at 30 mm resolution.
E-stops in one ISD chain
The gate on the third input
Stop, indication and reset
What it changes in daily life
One block showing each device
The device is named immediately
ISD carries a status for every device in the chain, so the control system shows whether the light curtain, a specific button or the gate switch tripped.
One block for the entire cell
Six inputs and two outputs cover the perimeter, the buttons, the gate, the tower light and the reset button. Separate relay modules for each device are no longer needed.
Resetting occurs at the cell
The K50 touch button sits where the operator works. It shows the state by colour and restores the input on touch once the device has been reset.
The block is located by the equipment
The IP67 housing of 262 x 74 mm is made for machine mounting. Power and data run over M12 connections, and the cable runs from the corners of the cell get shorter.
Questions and answers
Frequently asked questions
No. Each RSio input can serve either one safety device directly or an ISD circuit. The light curtain occupies its input as a separate device.
With the SSA-ISD-TCA adapter. It converts the switch's two NC contacts into an ISD signal, and the switch appears in the circuit just like ISD devices.
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