Specifications, 5 specifications – Crown Audio PSI User Manual

Page 13

Page 13

IQ–PSI IQ Pocket Serial Interface

5 Specifications

General

Internal Controls:

A 4-segment DIP switch is used to

configure the baud rate for communication with the
host computer. An 8-segment DIP switch is used to
set the IQ address of the interface. Both DIP switches
are located inside the battery compartment.

External Controls:

A two-position, Power On/Off

switch.

Connectors:

Crown Bus Input/Output: One 4-pin

male “Euro-style” connector and a mating screw-
terminal plug. AUX Port: One 3-pin male “Euro-style”
connector and a mating screw-terminal plug.
Computer: One female, 9-pin “D shell” connector
attached to the unit via a 16-inch (41-cm) serial cable.
External +10 VDC Power Input: One male coaxial DC
power connector.

Indicators:

A green Enable indicator is provided to

show that the unit is turned on and receiving power. A
yellow DSPI (Data Signal Presence Indicator) flashes
when a valid IQ command is sent or received from the
Crown Bus. It also provides a power-on battery
indicator and can be forced to stay on to facilitate
rapid troubleshooting of Crown Bus wiring. Both
indicators are located on the top side of the unit.

Power Supply:

An external power adapter is provided

to transform standard 120 VAC, 60 Hz power to +10
VDC for the unit. In addition, the unit can be powered
for about 1 hour with a 9-volt alkaline battery.

Finish:

Molded black high-impact styrene.

Crown Bus Data Communication

Data Rate:

38.4 K baud.

Data Format:

Serial, binary, asynchronous; 1 start bit;

1 stop bit; 8 data bits; no parity.

Interface Type:

Optically isolated 20 milliamp serial

loop.

Operation:

Half duplex.

Intelligence:

8-bit microprocessor.

Transmission Distance:

Variable from 200 to 3,000

feet (61 to 914 m), depending upon wire capacitance
and baud rate. Typically 1,000 feet (305 m) using
shielded twisted-pair wire, #26 AWG or larger. Can be
extended with an IQ Repeater.

Host Computer Data Communication

Data Rate:

4800, 9600, 19200, or 38400 baud.