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4.1 ANALOG OUTPUT MODULE DESCRIPTION AND OPERATION

The analog output module consists of eight only 4-20 mA output channels. These

outputs are current sourced. Each channel can be independently scaled using the

code menu system on the PDC controller. These channels can also be assigned to an

individual sensor or to a group of sensors through zoning. If zoned, the output will

always be from the sensor with the highest output in the zoned group of sensors.

Once power has been applied to the analog output module circuit board, any enabled

outputs without connected loop wiring will illuminate the channel specific red LED.

This circuit utilizes eight red LEDs as “open loop” indicators. If a red LED open loop

indictor is illuminated, even though the wiring for that specific 4-20 mA output channel

has been terminated, it means there may still a problem with the wiring connection or

one of the output channels has been enabled but not utilized. Double check the wiring

or disable any unused output channels.

The analog output module is shipped pre-programmed and calibrated from the factory,

as long as the desired operational details have been supplied to us. Without opera-

tional details, we input a basic generic program providing one analog output per chan-

nel for systems with eight or less sensors. We require operational details for systems

with more than eight sensors.

The analog output module is programmed from the PDC controller programming push-

buttons. Reference the table of codes and their descriptions on the following pages.

This optional device will work only with PDC systems that have software version

“PDCa020.726” or later. Earlier version of the PDC software must be updated to utilize

this optional module. Contact the factory for information and costs associated with

updating your PDC controller.

IMPORTANT NOTE: WHEN UPDATING THE MAIN SOFTWARE IN THE PDC MAIN

CIRCUIT BOARD, ALL PREVIOUS PROGRAMMING WILL BE LOST. TAKE WRIT-

TEN NOTE OF THE DETAILS OF THE PREVIOUS PROGRAMING. IT WILL BE

REQUIRED TO SET P THE SYSTEM AGAIN, AFTER INSTALLATION OF THE

NEW SOFTWARE.

5.0 PROGRAMING GENERAL

The PDC controller has an extensive menu system that allows the user maximum

flexibility, through programming, to achieve a wide range of system functions. Please

carefully read through the programming section of this manual before attempting to

make programming changes.

The following table indicates available programmable functions and the codes for the

analog output module only. Detailed descriptions for each function code can be found

on following pages.

Note: Holding down a button for more than 2 seconds will allow the user to scroll

very quickly.

3.1 WIRING ANALOG OUTPUT MODULE

The analog output module can be powered from three alternative sources.

a) Daisy-chain, 4-wire run from the system power.

b) Remote 24VAC power source

c) Remote 24VDC power source

Incoming Wiring

a) Daisy-chain, 4-wire run connection:

Place a jumper on “J3” and connect the power, 24V and common, to “24V” and

“COM” at either of the 4-position

terminal strips located along the bottom edge of the

circuit board. Either one can be utilized as the incoming terminal strip with the second

one assuming the position of outgoing terminal strip. These terminals are clearly

marked as “COM”, “B”, “A”, “24v’.

Connect the twisted-pair, communications cable to “B” and “A” of the same terminal.

MPORTANT: ENSURE THAT THE COMMUNICATION CABLES ARE CONNECTED

CORRECTLY. IF A

AND B ARE CONNECTED WRONG, THE SYSTEM WILL NOT

COMMUNICATE WITH THE ANALOG OUTPUT MODULE AND COMMUNICATION

WITH DEVICES FURTHER DOWN THE WIRE RUN MAY BE INTERRUPTED.

b) Remote 24VAC Power Source:

Ensure that no

jumper is installed at “J3”. Connect the two wires from the remote 24

VAC power source to the first two

terminal positions of the 3-position, terminal strip

located at the centre, bottom edge of the circuit board. These terminal positions are

clearly marked “24VAC”.

Connect the twisted-pair, communications cable to “B” and “A” of the same terminal.

MPORTANT: ENSURE THAT THE COMMUNICATION CABLES ARE CONNECTED

CORRECTLY. IF A

AND B ARE CONNECTED WRONG, THE SYSTEM WILL NOT

COMMUNICATE WITH THE ANALOG OUTPUT MODULE AND COMMUNICATION

WITH DEVICES FURTHER DOWN THE WIRE RUN MAY BE INTERRUPTED.

c) Remote 24VDC Power Source:

Ensure that no

jumper is installed at “J3. Connect the positive wire from the remote

power source to terminal position one

of the 3-position, terminal strip located at the

centre, bottom edge of the circuit board. Connect the negative wire from the remote

power source to terminal position three

of the 3-position, terminal strip located at the

centre, bottom edge of the circuit board. These terminal positions are clearly marked

“24VAC/DC”.

Connect the twisted-pair, communications cable to “B” and “A” of the same terminal.

MPORTANT: ENSURE THAT THE COMMUNICATION CABLES ARE CONNECTED

CORRECTLY. IF A

AND B ARE CONNECTED WRONG, THE SYSTEM WILL NOT

COMMUNICATE WITH THE ANALOG OUTPUT MODULE AND COMMUNICATION

WITH DEVICES FURTHER DOWN THE WIRE RUN MAY BE INTERRUPTED.

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Critical Environment Technologies PDC Series Especificaciones Pagina 7

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