Cattron Remtron 22R08A, Руководство пользователя

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CommandPro
®
General Purpose & Safety Applications
User Manual
20
9M02-9028-A031-EN
Rev 4
7. Receivers
7.1 Receiver Description 22R08A
The 22R08A receiver consists of a single RF/Relay Board mounted inside a NEMA 4 enclosure. In utility mode,
the 22R08A has eight control relays. Typically, in maintained link mode, the 22R08A receiver has eight control
relays configurable to customer applications and requires a continuously valid signal from the transmitter for the
system to operate. Figure 5 shows the general arrangement of the receiver.
7.1.1 RF/Relay Board
The RF/Relay Board contains the radio receiver, the microprocessor-based control system and the output relays.
Operating in conjunction with the microprocessor, signals are received by an advanced, synthesized RF module.
Commands are received on one of 81 possible frequencies and are checked against a 16-bit address code for
proper identity and further tested against a 16-bit CRC check. This ensures only valid information meant only for
the particular unit is decoded.
The microprocessor contains a programmable memory that retains the frequency, address and particular
operating parameters for the system. The receiver is field programmable by using a portable RAC16A Series
Handheld Programmer. For convenience, the interface terminal strips are unpluggable. The relay board can be
easily removed without the necessity of tracking wire numbers and positions.
7.1.2 Safety Features
Controlling heavy industrial equipment requires that the wireless control system be reliable with built-in safety
features. Each transmission goes through several checks to ensure that the information being received is error
free. Millions of combinations of frequencies and address codes mean that no two systems will ever be produced
with the same frequency and address code.
The 22R08A receiver may be configured with a safety interlock that is controlled by the microprocessor only in
maintained link mode. If for any reason valid data is not being received for more than one second, all relays will
open. In addition, all relays are opened any time an operator sends a STOP command.
7.1.3 Receiver Diagnostics
While the 22R08A receiver is technically very complex, it is exceptionally easy to maintain and troubleshoot.
Diagnostic LEDs plus an LED for each output relay are all that are required to isolate a problem should one occur.
The receiver assembly monitors and indicates its status on a continuous basis.