Chapter 15 – Installation
5.13 DIGITAL INPUTS
The RA331 and RA332 modules have up to 32 insulated digital inputs, and the RA333 module has up to 16,
as shown in Figure 129.The digital inputs of RA331 and RA332 modules are identified of 201 to 232. The
digital inputs of RA333 module are identified of 201 to 216. Make sure that the appropriate terminal pair are
selected to the voltage applied.
Figure 129: Digital Input Terminals
Each block of 8 inputs uses an appropriate connector which can be disconnected of the module. When
plugging it, make sure that it is perfectly fitted.
Connections shall use insulated flexible wires of 1.5 mm² cross section and 5.08 mm pitch plug terminals.
For information about digital input specifications, see Section 2.6 of the Specifications Chapter 17.
5.13.1 CONNECTION DIAGRAM OF THE DIGITAL INPUTS
Figure 130: Connection Diagram of Digital Inputs
5.14 TIME SYNCHRONIZATION INPUTS
Timing synchronism is provided by the IRIG-B000/001/002/003/004/005/006/007 signal. The IRIG-B signal is
used to keep the RPV311 data acquisition frequency constant and to provide the time stamp for the
equipment.
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