CFA633-RDI-KU datasheet(32/86 Pages) CRYSTAIFONTZ

32 / 86 page

Crystalfontz America, Inc.

Data Sheet Release Date 2012/02/21

www.crystalfontz.com

CFA633-RDI-KU LCD Module (Hardware v2.0 / Firmware u2v1)

February 2012

Page 32

CONNECT OPTIONAL CRYSTALFONTZ WR-DOW-Y17 TEMPERATURE

SENSORS

The Crystalfontz WR-DOW-Y17 cable has a DS18B20 Dallas Programmable Resolution One-Wire (DOW) temperature

sensor attached to a “daisy chainable” cable. (“Daisy chain” means several devices connected in a linear series.)

Connect one WR-DOW-Y17 to the connector labeled J_DOW.

Figure 13. J_DOW Connection for WR-DOW-Y17 Temperature Sensor

If desired, connect the WR-DOW-Y17’s 3-pin male connector to an additional WR-DOW-Y17 temperature sensor. Up to

32 WR-DOW-Y17 temperature sensors can be connected. (“Daisy chained”.)

The DS18B20 on the WR-DOW-Y17 has 0.5°C absolute accuracy. Or you make a temperature sensor cable using a

DS1822 Dallas Econo One-Wire Digital Thermometer with +2°C accuracy.

Any temperature sensor can be configured to be automatically read and display to the CFA633-RDI-KU's LCD in °C or

°F (see command 21 (0x15): Set Up Live Fan or Temperature Display (Pg. 47)). Independently, any temperature sensor

can be configured to report to the host (see 19 (0x13): Set Up Temperature Reporting (Pg. 46)). Any sensors configured

to be reported are updated once each second.

HOST COMMUNICATIONS

CFA633 communicates with its host using an RS-232 interface. The port settings are 19200 baud, 8 data bits, no parity,

1 stop bit by factory default. The speed can be set to 115200 baud under software control (see command 33 (0x21): Set

Baud Rate (Pg. 56)).

c 2010

America, Inc.

Crystalfontz

J_DOW

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