iPlayer 3 User Guide
32
Appendix B
C
onfiguring Remote Triggering Devices
Electrical
The RS-232 serial port connections on the iPlayer 3 are DB9F connectors, labeled
SERIAL
1 and
SERIAL 2
.
The following pinout information applies to each DB9F connector (the other pins are
unconnected):
+5 VDC is provided on pin 4 (normally the DTR pin). Other devices can use this voltage
provided they draw no more than 50 mA. If the voltage on pin 4 is not desired, it
can be disabled by moving configuration DIP switch 1 (for serial port 1) or DIP switch 2 (for
serial port 2) to the OFF position.
Protocol
The serial protocol used to control the Controller Keypad, AuxBox or third-party triggering
device is 9600 baud, 8 data bits, no parity, 1 stop bit. There is no flow control. Each command to
the iPlayer 3 consists of five characters. The first character is always
X
. The next two characters
are the ASCII representation of a hexadecimal command byte. The last two characters are a
hexadecimal data byte. The hexadecimal alpha characters are uppercase (
0
-
9
,
A
-
F
).
•
Replies from the iPlayer 3 are also in this format, but begin with
Y
instead of
X
.
•
Characters are not echoed by the iPlayer 3 when they are received.
•
Illegal characters or badly formatted packets are ignored with no error indication.
2
TxD
3
RxD
4
+5V DC controlled by the DIP switch setting
5
Ground
