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Supports Poll\Response SCADA Networks
Anti-Streaming Capability for each Channel
Standard 8 Channels (& up to 24 channel versions available); Separate Units can be Cascaded
LED Indicators for Each Channel's Tx & Rx Status
Stand Alone or Rackmount
The TC8916 Broadcast & Receive Device is designed specifically for SCADA and process control
applications utilizing an RS-232 or RS-422 interface. It broadcasts & receives information to and from
remote devices over either metallic cable or fiber optic media (in conjunction with a fiber optic device). The
TC8916 is transparent to all data sent in either direction.
The MAIN port on the TC8916 receives a broadcast message from the main controller via Port 1 and
simultaneously broadcasts the message out through all additional ports (Ports 2 through 8, 16, or up to 24 -
depending on the model). The broadcast message (sent by the SCADA HOST) has embedded identification
(ID) information for each RTU. Only the RTU that matches the SCADA's poll ID number will respond.
An anti-streaming capability is provided for each channel to prevent a single node failure from disabling the
system. The channel will be disabled when the RTU's Tx data line exceeds a given length of time (typically
10 seconds). Once disabled, the TC8916 will attempt to resume communications after the jam condition is
no longer present.
The TC8916 supports RS-232 or RS-422 interfaces. Connectors are RJ-11. Standard input power is 12V
DC or optional 24VDC, 48VDC, or 115/230V AC with an external power cube. Each unit consists of a Base
Board and up to eight optional Expansion Boards.
The Base Board provides the following:
PWR A & B Jacks: Only one power connection is required to operate the unit. When power is supplied
Channel 1 Port:
CH2 - CH8 Ports:
Each optional Expansion Board provides the following:
PWR A & B Jacks: There are redundant power supply jacks with terminal block connectors on each
Each card, 8 Ports: Each additional expansion card provides 8 channels for use to broadcast & receive
Note: If additional ports are required, the unit can be cascaded to a second unit's Host Port from any one of the Broadcast Ports.
to the jacks with terminal block connectors A and B (from two different sources),
power redundancy is enabled. If either source fails, the other assumes the full load
automatically.
Channel 1 is used to connect the RS-232 or RS-422 device whose signal is to be
broadcasted via the RJ-11 jacks. This port is referred to as the "MAIN" Port.
Channels 2 through 8 are used to broadcast and receive the RS-232 or RS-422 signal
to/from up to seven user's devices via RJ-11 jacks. The responding devices share
the response channel through an OR gate, as only one device (that with the
corresponding ID) will respond to the Main's broadcast message at any given time.
expansion board. Any one set of power jacks supplies power to the base board and
any expansion boards (the boards are connected internally).
the RS-232 or RS-422 signal to and from additional user's devices via the RJ-11
jacks. Customer can order up to a total of 24 channels including the main channel.
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MNL-89160-05-03
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