The following 3 Quantum Safety I/O modules are certified for use in safety applications:
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140 SAI 940 00S (Analog Input)
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140 SDI 953 00S (Digital Input)
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140 SDO 953 00S (Digital Output)
The 3 Safety I/O modules allow you to connect the Safety PLC to the sensors and actuators, which are part of the Safety loop. All of them are composed of 2 micro controller systems running the same program, sharing the same information and checking each other periodically. You can install these I/O modules in the local backplane or in remote I/O drops.
Description of the CPU-I/O Communication
In general, the Quantum Safety CPU masters all backplane exchanges whereas the other modules are slaves. Between Safety CPU and Safety I/Os, data are exchanged through a dual port RAM, located in the I/O module.
For the communication between CPU and remote I/Os (RIOs), you must use the following 2 non-interfering modules:
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140 CRP 932 00 (RIO head adapter), located in the local rack
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140 CRA 932 00 (RIO drop adapter), located in the RIO drop
Optionally, you can use Fiber Optic repeater modules (140 NRP 954 00, 140 NRP 954 01C). Those modules enhance remote I/O network noise immunity and increase cable distance while maintaining the full dynamic range of the network and the safety integrity level.
The communication protocol between the Safety I/O and CPU secures their exchanges. It allows both to check the correctness of received data, and detect any failure of the transmitter or during the transmission. Thus, a safety loop may include any non-interfering RIO adapters and backplane. For details on this topic, see
Safety I/O Modules Diagnostics.
NOTE: Use the red labels provided with the Quantum Safety /IO modules to clearly indicate the Safety modules.
