one male DB-9 RS-232 input connector (J2),
and one female DB-9 RS-232 output connector (J1)
The ASCII Time Code Option Card, Model 1204-04 (RS-485) consists of one RS-485
input, and one RS-485 output, integrated in a shared terminal block connector.
The interfaces accept Asynchronous Serial signals including date and time information.
The input and output Data Formats are selected among predefined formats.
ASCII input
The ASCII input provides a serial data interface between an ASCII time generator (e.g.,
another SecureSync unit), serving as an input reference for Time and 1PPS in order to syn-
chronize SecureSync (in conjunction with, or in lieu of, other available inputs, such as
GNSS and/or IRIG).
ASCII output
The ASCII output provides SecureSync with the ability to output one, two or three back-
to-back ASCII time code data streams that can be provided to peripheral devices which
accept an ASCII RS-232 input data stream for either their external time synchronization or
for data processing. See "Time Code Data Formats" on page519 for a description of all
supported time code formats.
The RX signal on an output interface is used for triggering the output ASCII message out-
put when a configured character is received from the peripheral device.
When SecureSync is configured to output only one format message (the second and third
formats configured as “None”), the one configured message will be available on the output
port as either a broadcast message or only upon a request character being received.
SecureSync has the ability to output one or two additional data stream messages imme-
diately following the first message. In this configuration, only the first message determines
the on-time point for the entire output string. The on-time points for the second and third
messages that are provided at the same time as the first message are discarded. This
unique capability allows SecureSync to be able to simultaneously provide multiple pieces
of data from different selected format messages.
An example of selecting multiple formats is selecting “NMEA GGA” as the first format,
“NMEA RMC” as the second format and “NMEA ZDA” as the third format. Depending on
the setting of the “Mode” field (which determines if the data streams are available every
second or upon a request character being received), at the next second or the receipt of
the next request character, the output port will provide the GGA message followed imme-
diately by the corresponding RMC message for that same second, followed immediately by
446 SecureSync 2400 User Manual
APPENDIX
To Next Page
Loading...
Need help?
General
