Crown IQPSI Brochure

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IQ-PSI Pocket Serial Interface

* System

* System

®

®

®

®

Product Reference

Product Reference

OVERVIEW

The pocket interface is a product de­signed as a tool for use by installers
and servicers of IQ Systems. The
PSI is a physically small inter­face between RS232 to a com­puter and one Crown Bus se­rial data loop.

APPLICATIONS

Applications for the product are
primarily for setup of IQ Systems where
an INT II or other interface product is not
meant to be a permanent part of the
system. This tool allows the installer to
bring the pocket interface with him to a
site, program the system with a laptop,
then take his laptop and PSI with him
when he leaves. This is particularly true
for relatively small installations. In larger
systems the PSI is very valuable for
mobility, particularly when checking
parts of a system that may be located
remotely.

C D

POWER

RS232

ENABLE DSPI

A

POCKET SERIAL INTERFACE

B



AUX CROWN BUS

Elkhart, IN 46517 U.S.A.

1718 W. Mi shawaka Rd.

10 VDC IN

E

F G

PSI Top View PSI End View

HARDWARE

• The PSI is about the size of your hand.

• It has a black finish.

ENABLEDSPI

POCKET SERIAL INTERFACE

1718 W. Mishawaka Rd.

Elkhart, IN 46517 U.S.A.

10 VDC IN

ENABLEDSPI

ENABLE

ODEP
IOC
SPI

CH1 CH2

OFF

ENABLE

ODEP
IOC
SPI

CH1 CH2

OFF

ENABLE

ODEP
IOC
SPI

CH1 CH2

OFF

PSI Example Application

128
64
32
16
8
4
2

IQ ADDRESSBAUD RATE

1

12345678

ON

(DOWN)

4,800

VER:

9,600



19,200

INSIDE THE BATTERY COMPARTMENT.

38,400

1234

THE SWITCHES SHOWN BELOW ARE LOCATED

PSI Bottom View

CAUTION: USE ALKALINE BATTERY ONLY!

AUX CROWN BUS

RS232

POWER

RS232

+–+–

INPUT OUTPUT

IN OUT

+10

VDC

AUX CROWN BUS

MODEL: IQ-PSI

EXT

PWR

INPUT

S/N:

H

• Power switch (A). It connects or

POWER

disconnects power from the bat­tery or AC source. Any time the

POWER

PSI is off or loses power drop-out
relays bypass the Crown Bus
connection to the unit.

• Attached RS232 cable (B) with

POWER

female DB9 serial connector. The

CROWN BUS LOOP

PSI automatically senses the pres­ence of a PC at its RS232 connec­tor. If there is no PC present the
unit closes its loop to operate as
a component. When an RS232

connection is sensed it opens the loop
to serve as interface.

• Data LED (C). It lights to indicate
reception of data being addressed to
the unit.

• Enable LED (D). It indicates AC or
battery power is available and that the
unit is switched on.

• +10 VDC input (E) for a standard AC
adaptor.

• Aux port (F). It has a three pin remov­able barrier block connector. Most IQ
components have such a port to pro-

IQ-PSI (Page 1 of 2)

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* System

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IQ-PSI Poc ket Serial Interface (P a ge 2 of 2)

®

Product Reference

vide a control voltage for external use as
well as an entry point for a control volt­age into the system.

• Crown Bus loop connector (G). It uses
a four pin removable barrier block.

SETUP

To access the battery compartment and
setup switches slide the battery cover
off the back panel. Before inserting a
battery configure the baud and ad­dress switches as necessary. Note that
no two PSI units on the same loop may
have the same loop address, valid ad­dresses range from 1 to 250. Baud may
be set for 38,400, 19,200, 9,600, or
4,800.

SWITCHES

1

2

3

ON

4
OFF
OFF
OFF

ON

BAUD

38,400
19,200

9,600
4,800

ON
OFF
OFF
OFF

OFF

ON
OFF
OFF

OFF
OFF

OFF

IQ2 SUPPORT

The IQ-PSI is an IQ2 component and, as
an interface, it supports both IQ2 and
legacy protocol.

SPECIFICATIONS

Internal Controls — One 8-segment DIP

switch to set the address, one 4-seg­ment DIP switch to set RS232 baud
rate.

External Controls — Power on-off.
Connectors — One 4-pin “Euro-style”

removable barrier block Crown Bus
connector, one 3-pin “Euro-style” re­movable barrier block aux port connec­tor, one female 9-pin RS232 connector
on attached cable, one male coaxial
+10VDC external power input jack.
Indicators — Green Enable LED shows
unit is powered and switched on and a
yellow Data LED that indicates data
transmitted to/from the unit or may be
forced on via software.

Power — Standard 9 VDC battery or
external 10 VDC supply.
Finish — Molded black high-impact sty­rene.
Crown Bus Isolation — Data is optically
coupled to 20 mA current loop.
Data Rate — 38.4K baud on Crown Bus
loops; 4.8 to 38.4K baud to computer.
Data Format — Serial, binary, asynchro­nous, 1 start bit, 1 stop bit, 8 data bits,
no parity.
Crown Bus Interface Type — Isolated 20
mA current loop.

PC Interface Type — RS232.
Operation — Half duplex.
Crown Bus Transmission Distance — 300

to 3000 feet (90 to 900 m), depending
on wire type, size, and capacitance.
Typically 1000 feet (300 m) with shielded
twisted pair 26AWG or larger; extend­able via IQ Repeater.
Transmission Distance RS232 — 50 feet
(15 m).

Baud Rate Selection

GENERATOR

RS-232

GENERATOR

GENERATOR

IQ ADDRESS

BAUD RATE

BAUD RATE

BAUD RATE

SWITCH

MICROPROCESSOR

PSI Basic Block Diagram

RELAYSOPTOCOUPLER

BUFFER

BUFFER

CROWN BUS

AUX

AUX

Guaranteed Excellence

@crown

Crown International, Inc.

PO Box 1000 Elkhart, IN 46515-1000

Ph. 800-342-6939/219-294-8200

Fax [phone]

Internet: www.crownintl.com

Trademark Notice:Trademark Notice:

Trademark Notice:

Trademark Notice:Trademark Notice:

IQ System

Crown International Inc.

®

is a registered trademark of