24
7.8 SYSTEM PROGRAMMING - ANALOG OUTPUT CODES
“3231” Output Channel Enable or Disable: This code allows the user to enable or
disable any of the four system analog output channels. To achieve this, input code
“3231”, then depress push-button “3” for enable or “1” for disable. Depress push-
button “2” to scroll to the next channel. Once this function is finished, continue to
depress push-button “2” until you reach the last channel and the system will
automatically start to scroll through all “active” channels.
Selection: “Yes or No”
“3112” Monitor Input Channel: This code allows the user to select the input
channel each analog output channel will monitor. Each output can monitor only one
input channel. To achieve this, input code “3112”, then depress push-button “3” to
increment or “1” to decrement to the desired channel. Depress push-button “2” to
scroll to the next channel. Once this function is finished, continue to depress push-
button “2” until you reach the last channel and the system will automatically start to
scroll through all “active” channels.
Selection: “1, 2, 3 or 4”
“1321” Setting Analog Output Low Range: This code allows the user to select the
low range measurement for each channel. Default is 4.0 mA = “0”. This is a locked
function. To achieve this, first input the software unlock code, then input code
“1321”, then depress push-button “3” to increment or “1” to decrement the value.
Depress push-button “2” to scroll to the next channel. Once this function is finished,
continue to depress push-button “2” until you reach the last channel and the system
will automatically start to scroll through all “active” channels.
Selection: “0 to 1000”
“1322” Setting Analog Output High Range: This code allows the user to select
the high range measurement for each channel. Default is 20.0 mA = “full sensor
measurement scale”. This is a locked function. To achieve this, first input the
software unlock code, then input code “1322”, then depress push-button “3” to
increment or “1” to decrement the value. Depress push-button “2” to scroll to the
next channel. Once this function is finished, continue to depress push-button “2” until
you reach the last channel and the system will automatically start to scroll through all
“active” channels.
Selection: “ 0 to 10,000”
Note: Carbon Dioxide (CO2) is the only gas sensor type that provides a measure-
ment range selection from “0 to 50,000”.
AC 1 Menu 3231
Enabled ? Yes
AC 1 Menu 3112
Mon Channel 1
AC 1 Menu 1321
Range Low 0
AC 1 Menu 1322
Range High 200
5
1.0 GENERAL
The PAC-44 series systems are rugged, microprocessor based, programmable
controllers for use in non-hazardous (non-explosion rated) environments for
commercial and industrial applications. They can be configured for use with one to
four remote analog transmitters. They can also be configured with one integral
electrochemical sensor.
A standard system provides an LCD digital display, a common set of LED indicating
lights for fail, low, mid and high alarms, audible alarm with silence button, four
analog inputs, four analog outputs and four dry contact relays.
A large selection of “AST” series analog transmitters, utilizing electrochemical,
catalytic, infrared and MOS (Metal Oxide Semiconductor) sensor elements, are
available for use with this controller.
2.0 SPECIFICATIONS
Physical: a) Dimensions: 8.78” (223 mm) Wide X 10.5” (267 mm) High X
6.25” (159 mm) Deep
b) Weight: 6.33 pounds (2.87 kg)
Construction: Water/dust tight, corrosion resistant fiberglass with hinged,
secured door and Lexan door label
Power: 90 to 240 VAC, 47 to 63 Hz.
Current Load: Maximum allowable system current load is 1.36 Amps @ 24 VDC
Relays: Standard: Four only S.P.D.T. dry contact relays rated 5 amps @
240 VAC each
Output Signal: Linear, analog 4 - 20 mA or 0 - 10 VDC, jumper selectable
Visual: a) Common set of LED indicating lights for: Fault Alarm (red),
Low (Warning) Gas Alarm (amber), Mid Gas Alarm (red), High
Gas Alarm (red)
b) 16-character, two-line, back-lit LCD digital display
c) Amber colored, LED light, relay coil status indicators (internal)
d) Red colored, LED light “open loop” indicators for analog inputs
and analog outputs (internal)
