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10
SRC-16 Plus Installation and Operation Manual
SETUP
Pair Operation Mode (Mode 4)
The SRC-16 Plus can be used to transmit the outputs from one unit to another over
a serial connection. The logical sense of the inputs is inverted when written to the
outputs of its corresponding unit. Normally inputs are high and when closed, go to
logic 0 when in pair mode. When logic 0 is received, it will write logic 1 to the out-
put. This allows the relay outputs 01-16 to come on if its corresponding input is
closed. Multiple units can also be set up to communicate with the same number of
units on the other end of a data link. All units must have dip-switches 5 and 6 turned
ON, and the unit addresses must have a corresponding unit on the other end of the
link set to the same address. For example, if you have two units on each side set to
address 0 and 2, then the two units on the other side of the data link must also be set
to 0 and 2.
All units will automatically transmit the states of their inputs on power up, every ten
seconds and when any input changes state. If a unit does not receive an update from
its corresponding paired unit for a period of about 10 seconds, it will begin flashing
the red RX LED one second on, one second off. When communication is restored,
the LED will cease to flash.
NOTE:
To daisy-chain multiple SRC-16 Plus’s, only use the supplied one foot RED
straight-through CAT 5 (daisy-chain) cable to connect multiple SRC-16 Plus’s
together. Limit to 18 inches.
Pair mode can also be used to broadcast input closures from one unit to many using
a shared data link. The inputs on the transmit SRC-16 Plus will appear on all of the
receive units as long as their address codes match. If only one unit is used at each
site, it must be set to an address of zero. The red RX LED will blink on the transmit
side to indicate it is not getting return data from the remote units. However, the data
being broadcast will still cause the remote relays to follow their corresponding
inputs on the broadcasting unit.
Note:
If jumpers JP23 and 24 are ON and the SRC-16 Plus is in pair mode, it will
control its own relays, essentially being a pair with itself. This is an easy way to test
the inputs and outputs of a single unit. Normally JP23 and 24 should BE
REMOVED, or you may have unintended consequences of a unit’s relays respond-
ing to input closures generated from the same board.
Mode 5
Not used.
