Communications Module - GE Multilin F650 Instruction Manual

3.1 MODULE DESCRIPTION
• Input/Output module included in basic unit
• Optionally, a second I/O module can be added.
The F650 can incorporate a simple or redundant power supply.
The power supply module is fixed to the base plate using 4 screws, and the main and backup modules are
identical.
These modules work in parallel continuously, distributing the 50% of the load for each of them, thus ensuring
greater reliability, and an instantaneous load transfer from the failed power supply to the other one, without
loss of time or module reset.
A relay connected to the low voltage side of the power supply monitors this voltage. The three contact
terminals, normally open, common, and normally closed, are available at the external connector terminals.
This relay monitors only the power supply integrity and it is not controlled by the main microprocessor. This
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way, if we want a relay to monitor whether the unit is ready to protect (READY), we should program one of the
auxiliary relays in the unit.
This is a "fly-back" type power supply, providing high efficiency, stability and reliability thanks to the maturity of
this technology. There are two available ranges, Hi and Low, in order to optimize efficiency and general
performance, including the capability to tolerate auxiliary voltage interruptions (dips).
Oversized components highly resistant to temperature are used. For example, all capacitors are specified to
stand up to 105ºC, transformer components are specially designed to stand up to 180ºC, the used MOSFET
transistor is of very low resistance, supports high voltage and is refrigerated by an oversized heat sink. This
allows to support temperatures over the 60ºC shown in the Technical Characteristics section, and prolonged
overloads such as the ones occurring at batteries in deep charge mode (much higher than +15% voltage
shown in the Technical Characteristics section).
High capacitance capacitors are also used, providing high tolerance to prolonged dips, 100ms, even in the
most unfavorable consumption conditions. This allows the relay to continue with normal operation without
undesired resets, which would cause a long time of protection unavailability
Figure 3–2:: COMMUNICATIONS MODULE shows the location of communications modules over the CPU.
These modules have been designed in accordance with the "plug and play" philosophy, so that units can be
easily updated after their purchase, allowing for a simple and economical migration of the application.
Skilled personnel must carry out the insertion or extraction of communication boards, only after interrupting the
relay auxiliary voltage, and making sure that all rear terminals are potential free.
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Figure 3–2: COMMUNICATIONS MODULE
F650 Digital Bay Controller
3 HARDWARE
GE Multilin