Chapter 3 – Hardware Design
D Up to 8 pairs of connectors for fiber-optic links. For each link there is an Act indicator that lights up when
the link is receiving data of the acquisition module.
E AC or DC power input.
F 4 dry contact relays.
G Electrical and Optical (optional) IRIG-B input for the external synchronization of the equipment.
H 2 electrical Ethernet interfaces for the communication between the equipment.
I 1 electrical Ethernet interface for the Process Bus communication.
J Double internal converter for optical Ethernet interface.
K Serial port RS323 for modem connection.
L Maintenance ports for exclusive use by Alstom's technical support personnel.
3.2 RA331
3.2.1 MAIN FEATURES
Up to 8 analog inputs (voltage, current, DC transducers, probes);
Up to 32 digital inputs;
16-bit analog-to-digital converters, 256 points-per-cycle sampling rate;
Frequency response of DC to 3.0 kHz;
Fiber-optic interface to connect to the processing module;
Up to 2 km fiber-optic links;
Front panel mounting or internal panel mounting.
3.2.2 COMPONENTS
Figure 5 shows all the components of the RA331 module.