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load. TTL output current is capable to drive standard solid state relay, but will not be
able to drive those coil based relays. Be aware of the current requirements of the
circuits/loads attached to these outputs. Damage will occur to the board if too much
current is allowed.
2.3 AUX Input Port
The AUX input connector offers digital and analog inputs that can be monitored or
programmed to set a single TTL output or several TTL outputs. Three analog inputs
are available, each have an input range of 0 to 10Vdc. Eight digital inputs are
available and use TTL input levels (0 and 5Vdc). The AUX Input Port pin out diagram
(labeled as J12AUX in Figure 1) shows the layout of this port in more detail. The
matching connector for this port is TYCO ELECTRONICS - 1658622-3 .
2.4 1-Wire Sensor Input
The 1-wire sensor port allows up to eight Maxim DS1822/DS18B20/DS18S20 1-wire
temperature sensors to be connected. It also allows one Maxim DS2417 real time
clock, and one DS2450 4 channel A/D converter. The temperature and analog input
can be displayed via the HTTP browser and can be used as inputs to the PLC engine
to control the TTL output port. Since hardware revision 2.2.2 uses 5V to power 1-
wire bus, there is no need for any external power to the sensors. Please note if more
than one DS2450 is attached to 1-wire bus, only the first one will be used by the
firmware. If more than 10 1-wire devices attached to the bus, only the first 10 will be
used.
2.5 Humidity Sensor Input
The current WebControl
series relative humidity sensor devices. Using any other humidity sensor without
careful consideration may result in malfunction of this feature. The RH sensor can be
used to display relative humidity via HTTP or be used to control the TTL outputs as
an input in the PLC engine.
Copyright(c) 2008,-2011 CAI Networks, Inc.
WebControl
TM
hardware has been designed to use the Honeywell 4000
Please make sure the temp sensor
and humidity sensor connected
similar to this picture. Reverse the
polarity may cause damage to the
board.
TM
PLC User Guide Version 3.02.17f
Figure 2.0 WebControl
connections
TM
sensor
3
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