Advantech AWMT, Installation And Operation Manual

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AWMT
19
5. INTERFACES
Each transceiver provides five interfaces that can be used to connect the unit to several optional
external devices. The interfaces for this model are listed below:
1. Relay (Discrete) Interface: This interface offers the essential monitoring and control of the
transceiver by the discrete signals.
2. RS-232 Interface: This interface offers the operator essential monitoring and control of the
transceiver using a PC with Term95 or HyperTerminal communications programs.
3. RS-485 Interface: This interface offers the complete monitoring and control of the AWMT
transceiver through the RS-485 serial communication port in packet mode. The system may
be connected to a Monitor & Control Panel or to a Network Manager System (NMS)
4. RF Output Monitor Interface: This interface provides a sample of the output power of the
unit through a 40-dB coupler.
5. Redundancy Interface: The redundant interface provides the communication link between
the two AWMT micro-controllers within a 1:1 redundant system. This interface also
provides control over a redundancy waveguide switch.
6. TX & RX LED’s : green/red LED’s indicating the state of the transmission & receive paths.
•
If this LED is not lit, the unit is not powered (or the power supply failed). In redundant
systems, if this LED is not lit it indicates that the unit is in STAND-BY and in MUTE.
•
If this LED is RED lit, it indicates that the unit is in FAULT or ALARM condition.
•
If this LED is blinking RED, it indicates that the unit is in MUTE state (following a
MUTE command).
•
If this LED is GREEN lit, it indicates that the unit is functioning properly. In redundant
system if the LED is GREEN lit indicates that the unit is ON-LINE. If it is blinking
GREEN it indicates that the unit is in STAND-BY and NOT MUTE (RF ON).
5.1 RELAY INTERFACE
The
Relay Interface uses a 10-pin circular connector mounted on the transceiver enclosure. The
connector type is listed in TABLE 2 at page 21 and the location is shown in Figure 4 at page 21
and in Figure 5 at page 22. The pin assignment for this interface is shown in TABLE 3 at page
22.
Pins A, B and C of the connector are of Form-C relay type outputs that provide for the user an
indication of informing the status of the transmission path of the AWMT unit.
Pins D, E and F of the connector are of Form-C relay type outputs that provide for the user an
indication of informing the status of the receive path of the AWMT unit.