4.2
Output Control
This CV determines how the output will respond when it is turned on. The following table
shows how each output control is defined. See section 7 for CV numbers.
The normal state for the outputs is to drive common anode LEDs . If you want to use a
common cathode connected LED select the invert normal state. If you want to change all
the outputs set Option 8 of the Decoder Configuration CV.
The delay effect causes the output to delay turn on once it has been commanded.
Reciprocal is used only with the flash effect to cause two outputs to flash alternately. Both
outputs have to be selected to flash with the same dura-
tion. One of the outputs is selected for reciprocal. This
can be used for grade crossing flashers.
The duration of time works only when one of the ef-
fects is selected. It determines the flash rate and delay
time. See the table to get the value for selection based
on the time.
12
5
Output Control CV
Value
Select
Invert the normal state (for common cathode)
128
Select
Normal state
0
One
Effect, flash
16
Select
Effect, delay
8
No effect
0
One
Reciprocal or alternate (use with flash effect only)
4
Duration time, use with effect (see duration table)
0 - 3
Program this value into the appropriate output control CV
6 Applications
6.1 Switch Machine drive
The SRC16 is capable of driving low current stall type switch machines. It has been tested
with the Tortoise
TM
switch machine and can drive up to eight of them. Programming is the
same whether using a switch machine or LEDs. A group of two outputs for throw and close
needs to be used. “Smart” programming will automatically do this when addresses are
assigned.
Each switch machine is connected to one of the SRC16 group outputs. When the SRC16
receives a switch command for that group, lets say a close command, that output is
grounded. The thrown output is at 5 volts, so 5 volts is applied to the motor. It then moves
in the close direction. Likewise, when a throw command is received for that group, that
output is grounded. The closed output is now at 5 volts, so 5 volts is applied to the motor in
the opposite direction. Consequently, it moves in the throw direction.
Since the SRC16 uses 5 volts for motor drive, the switch machine moves slower than if 12
volts were applied. If a higher voltage is desired use the Team Digital MotoD. A MotoD is
a satellite motor driver that is controlled by the SRC16. Up to four MotoDs can be con-
trolled by the SRC16.
See section 5.4 for more information.
If an address greater than 255 is needed then use the address adder. The address adder value
represents a number that is added to the address value to give the ‘actual’ address. The fol-
lowing table shows the CV value to use for the adder. To set addresses for output groups see
“Smart” Programming for easier programming.
Address Adder
CV Value
0
1
2
3
4
5
6
7
8
9
ADD
0
256
512
768
1024
1280
1536
1792
2048
2304
SRC16
Serial bus
To other serial
bus devices
Cut
Termination
resistor
SRC16
Serial bus
Data
RS
Ground
RS
Data
Ground
RJ12 Connector
5.5
Serial Bus
The SRC16 has two RJ12 connectors for ease in making connections as shown below. In a
Digitrax system the data pins are LocoNet
and the RS pins are Rail Sync. In a Digitrax sys-
tem Rail Sync is a replica of the track power signal but has limited power. One of its uses is
to provide power to throttles connected to LocoNet. In the SRC16 the RS is only connected
to the two terminal RS connector. In a system where the SRC16 is NOT connected to Lo-
coNet the RS may be used to pass power from one SRC16 to another.
In a systems when more than 10 SRC16s are used the bus terminating resistor should be cut
on any additional devices.
Cables are wired pin 1 to pin 1
Duration Time
Value
Flash
Delay
0
.5 sec
5 sec
1
1 sec
10 sec
2
2 sec
20 sec
3
4 sec
40 sec
Output
Address CV
Value
Select
Address
1 - 255
Program this value into the appropriate address CV
Type CV
Value
Select
Close
64
Select
Throw
0
one
Message type, sensor
32
Select
Message type, feedback (actual switch position)
16
Message type, switch (commanded switch position)
0
one
Address adder (see the address adder table for amount to add)
0 - 9
Program this value into the appropriate type CV
