Serial Protocol - Extron electronics HC 404 User Manual

Receiver connections for display or device control
The serial, IR, digital I/O, CEC, and LAN ports can all be used for device control. All of these
ports must be configured using Global Configurator. HC 404 systems come with a basic
configuration installed, which you can customize.
Serial
3-pole COM port, RS-232 only (see
K
) — Use the COM port on the HCR 102 for
K
serial control of a display or other device and to
receive status messages from the connected
device. This port can send commands from a
driver file.

Serial protocol:

300 to 115200 baud (9600 baud = default)
•
8 (default) or 7 data bits
•
1 (default) or 2 stop bits
•
No parity (default), even, or odd parity
•
Flow control support (default = none):
•
software-only (XON, XOFF)
Use the following diagram as a wiring guide to cable the HCR 102 to other devices.
COM
HCR 102
Select protocol via software.
Rear
Panel
COM port default protocol:
Tx Rx G
• 9600 baud
• 8 data bits
• no parity
• 1 stop bit
• no ow control
NOTE: If you use a cable that has a drain wire,
tie the drain wire to ground at both ends.
Heat Shrink
G Ground
Rx Receive
Tx Transmit
Figure 5. Wiring the COM Port for Serial Control
For bidirectional serial communication, the transmit, ground, and receive pins must be
wired at both the receiver and the other device. Each projector or other device may
require different wiring. For details, see the manual for that equipment or read the Extron
device driver communication sheet, which is included with the drivers.
NOTE: Maximum distances between the receiver and the device being controlled
are generally up to 200 feet (61 m) but may vary based on factors such as cable
gauge, baud rates, environment, and output levels (from the HCR 102 and the
device being controlled).
figure 3,
Serial (COM) Port
(RS-232)
NOTE: The COM port supports
software ow control only.
Strip wires
3/16" (5 mm) max.
RS-232-
Controllable
Receive (Rx)
Transmit (Tx) Device
HC 404 System • Hardware Features and Installation
TIP: STP 20-2P
3/16"
cable, shown
(5 mm)
Max.
at left, is
7/8"
(22 mm)
recommended
for these
connections.
Heat Shrink
on Outer
For best
Jacket to
Inner results,
Conductor
insulate the
Transition
common or
drain wires
using heat
Extron
shrink.
STP 20-2P Cable
15