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4
SRC-32 Installation and Operation Manual
DESCRIPTION
PRODUCT DESCRIPTION
The Broadcast Tools® SRC-32 is a computer interface to the real world. Connected
through an RS-232 or RS-422/485 serial port the SRC-32 can notify your PC soft-
ware program that any of the 32 opto-isolated inputs has been opened or closed and
allows your software to control 16 - SPDT, 1-amp relays and an additional 16 open
collector outputs. Communication with the SRC-32 can be accomplished via short
“burst” type ASCII or binary commands from your PC (computer mode). Also, two
units can be operated in a standalone mode (master/slave mode) to form a "Relay
extension cord," with 32-channels of control in each direction. The unit can com-
municate using RS422/485 or RS232, at data rates up to 38400. The SRC-32 may
be expanded to 128 inputs x 128 outputs. Optional external Ethernet capabilities
may be added by the purchase of the SP-1. The SRC-32 is supplied with a 16 x 2
LCD display to indicate the status of both the inputs and outputs. A push button
switch allows LCD display selection of either inputs or outputs. Three front panel
LED’s display power, input or outputs along with the LCD contrast control.
Removable (Euro) screw terminals are provided for ease of wire
installation/removal.
Set-up:
Connect the supplied 12-vac power supply. When the SRC-32 is powered, the LCD
will momentarily display the version of firmware programmed into the flash micro-
processor and the current baud rate setting. The default baud rate setting is 9600, 8,
N, 1. The baud rate can be set to 2400, 9600, 19200 or 38400 (other baud rates may
be supplied). This can be done using either the ASCII or binary command formats
listed below. Inputs can be simple contact closures or completely optically isolated
with your external trigger sourcing current to the opto-isolators. See page 11 for
details on jumper settings to configure the inputs and relays. The RS-232 serial con-
nection is made either through the RJ-11 or male DB-9 connector. JP09 is used to
reverse the RS-232 transmit and receive pins and is normally set in the “RR” posi-
tion. The SRC-32 is supplied with a modular cord and DB-9 female to modular
adapter (S9). The male DB-9 is used to connect to an external modem. RS422/485
connections are made on the terminal block.
FRONT PANEL DESCRIPTION
The front panel allows the user to select either inputs or outputs to be displayed on
the LCD. The third front panel switch from the left is used to select inputs and out-
puts. The “input” LED will light when the LCD is displaying the status of the inputs
and the “output” LED will light when displaying output status. When an output is
off, a “0” will be shown and when it is on a “1” will display. The front panel LCD
displays the first 16 I/O from left to right on the top row and 17 through 32 from left
to right on the bottom. The user has the option of how an input is displayed. Inputs
are normally “high” when in the off state and pulled down to “0” when a contact is
closed. If you are monitoring TTL inputs, you may want to keep the display in this
format to display the true sense of the input. If you are monitoring contact closures,
you may want to have a “1” appear when the contact is closed and a “0” when it is
open. If this is the case, turn on DIPswitch position 8.
The green “Power” LED will light when the SRC-32 has power connected.
