3 Product Description
X-DI 16 01
Page 12 of 54
HI 801 057 E Rev. 4.00
3.4 Assembly
The input module has 16 safety-related digital inputs 48/120 VAC for contact makers. For
safely detecting a high level on the digital input, the voltage and current thresholds must be
exceeded, see Table 8.
The 8 short-circuit-proof supplies feed 2 supply outputs each (S1 to S8). One supply output
is assigned to each digital input.
The safety-related 1oo2 processor system for the I/O module controls and monitors the I/O
level. The data and states of the I/O module are made available to the processor modules
via the redundant system bus. The system bus has a redundant structure for reasons of
availability. Redundancy is only ensured if both system bus modules are inserted in the
base plates and configured in SILworX.
3.4.1 Block
Diagram
The following block diagram illustrates the structure of the module.
External Fuse 4 A
Field Zone: Contact Makers
Supplies S1 to S8 (48/120 VAC)
Interface
Safety-Related Processor System
System Busses
Figure 2: Block Diagram
