ControlByWeb X-600M, User Manual

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X-600M Users Manual Installation and Wiring
2.3.5 Optional Power Injector
As described in Section 2.3.2 above, the expansion modules draw their power from the X-600M thru the
expansion bus ribbon cable. The X-600M can provide up to 1.7 Amps for powering the attached
expansion modules. In applications where a large number of expansion modules are used and additional
current capacity is needed, a DC power injector can be employed. This accessory has two ribbon cable
connectors and a connector for supplying 9-28V to the expansion bus separately from the X-600M. The
communication signals pass-thru the power injector but the DC power from the X-600M does not. The
power injector thus provides power for all of the expansion modules to the left side of the injector. The
ribbon cable itself can only carry 1.7Amps maximum. Install one or more power injectors such that no
portion of the ribbon cable carries more than 1.7Amps
Note: It is recommended to power the X-600M and power injectors using the same power supply.
2.3.6 Temperature/Humidity Sensor Connections
The X-600M can communicate with external digital temperature or humidity sensors for monitoring
environmental conditions. The “1-Wire” data bus allows up to 32 temperature sensors to share the same
terminals. Together with power and ground the 1-wire bus requires three connections (+5V, Ground,
Data). Every sensor on the 1-Wire bus is assigned a unique serial number when it is manufactured. That
number is used to address the device during communication. The sensors have three wires as shown in
the table below.
Sensor Wire Color Connection
Red 5V Out
Black Gnd
Blue, White, Yellow Data
Multiple sensors can be connected in two ways: Directly connected (star topology) or “daisy chained”
(linear topology) as shown below.
A linear (daisy chain) topology minimizes signal reflections, providing a more reliable connection and will
allow longer cable length than a star topology. Appropriate strain relief should be used at the X-600M
and other connections that may be subjected to vibration, movement, or repeated handling.
Many factors determine the maximum length of the cable. Some of these include, but are not limited to
the type of cable used, the number of sensors, ambient electromagnetic noise, and/or sensor network
topology.
Combined cable lengths (to all sensors) of 600 ft using Cat 5e cable have been successful; however,
due to the uniqueness of installation environments, results may vary. Please test in the desired
Xytronix Research & Design, Inc. Page 15
Temperature Sensor