AirTest CN9000 Series Manual - Página 9

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AirTest Model CN9000 Basic Input/Process Module Detail
(4) – Output Channel Selector Block
Each comparators' digital (on/off, 1/0) output signal can be assigned to any one of 16 interconnect signal lines referred to
as channels. A comparator output can use the same channel as another output to provide a logical "OR" configuration.
This allows for a common signal to be present when any (1 OR 2 OR ...etc.) sensor level is above a TP. A typical system
will combine all Low level, all High level and all Fault TP's signals to drive 3 individual Low, High and Fault/Fail dry contact
relays.
Each output channel selector block is identified by white lettering printed on the circuit board just to the left of each block.
NOTE – Since a module can be plugged into the interconnect board on the left or right, the lettering and component
positions will be inverted to the images shown.
Even though selection of a channel is totally arbitrary some logic should be applied to the decision. The factory default
settings are jumpers placed on selector position 1 (channel 1) for TP1, on selector position 2 (channel 2) for TP2 and on
selector position 16 (channel 16) for sensor Fail/Fault. These selector block pins are marked with white outlined
rectangles in the image below. Jumper pin positions or channels are identified with white numbers printed on the circuit
board. NOTE – Only the odd number pins are marked.
This feature is no longer available unless specified at order time. The channel selection is factory set (hard
wired) as required be system specification.
(5) – Module Status Indicator.
A multi-colored LED is provided as status indication of the four output states of the module.
State Color
4
Red
3
Amber
2
Green
1
Off
State 1 – An LED that is not lit is an indication of a fault in the system. An "ON" signal is generated and placed onto
channel 16 (factory default) of the interconnect board. Refer to troubleshooting section on steps to resolve
this abnormal condition.
State 2 – No output signals are generated in this state.
State 3 – An "ON" signal is generated and placed onto channel 1 (factory default) of the interconnect board. This is a
normal condition as the long as it is expected that the sensor signal is at or above the TP1 level.
State 4 – An "ON" signal is generated and placed onto channel 2 (factory default) of the interconnect board. This is a
normal condition as the long as it is expected that the sensor signal is at or above the TP2 level.
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Distributed By:
(800) 821-4863 TOLL FREE
Description
Sensor signal level is at or above TP2 level.
Sensor signal level is at or above TP1 level.
Sensor signal in range and below all TP's.
Sensor signal is out of range or module has failed.
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GLOBAL CONTROLS, INC.
3008-B 16TH AVE W.
(206) 282-4666 TEL
SEATTLE, WA 98119
(206) 282-4888 FAX