Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL Status Module RFL Electronics Inc.
July 15, 2007 11 (973)
334-3100
FUNCTIONAL DESCRIPTION
The Status Module can be programmed to be either a transmitter, a receiver, or both. This section
consists of a functional description of the status transmitter and status receiver, and a circuit
description of the status module. A block diagram of the Status Module is shown in Figure 6.
STATUS TRANSMITTER
The status transmitter samples and sends the condition of up to 16 points to a matching receiver over a
single DSO. The transmitter is capable of sampling either eight or sixteen points depending on the
type of module adapter supplied. The sampling scan rate is fixed to allow for the updating of all
monitored points in less than 10ms. The module adapters plug into the multiplexer shelf directly
opposite the transmitter module. The transmitter can operate in both T1 and E1 multiplexers.
The status transmitter occupies one direction of a single DS0 and has no receive capabilities, however
the receive portion of the DS0 can be used by another device if needed. The transmitter employs
programmable addressing to prevent misconnections and transmits its address at least every 1
millisecond. There are 64 individual addresses available.
The transmitter module uses SCB for programming and diagnostic purposes and conforms to the SCB
protocol. The transmit address is set via the SCB.
STATUS RECEIVER
The status receiver works in conjunction with the status module transmitter described above. It can
output up to sixteen monitored points which are updated every 10 milliseconds. The polarity of the
outputs are settable through the SCB on the receiver module. The status receiver can operate in both
T1 and E1 muliplexers.
The status receiver occupies one direction of a single DS0 and has no transmission capabilities,
however the transmit portion of the DS0 can be used by another device if needed. The receiver
employs programmable addressing to prevent misconnections. There are 64 individual addresses
available. If the receiver has not accepted a valid address in the last 1ms its output will be squelched
and LED DS17 will light until a valid address is received.
The receiver module uses SCB for programming and diagnostic purposes and conforms to the SCB
protocol. The receive address is set via the SCB. All outputs can be monitored via the SCB and NMS.
The unit is settable to respond in 10ms or 100ms. The 100ms response samples more messages for
greater security.
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