Guardian Telecom PSCU Guide

Paging System Control Unit
Model PSCU
Installation & Operation
P006773 Rev. C 151109 11/9/2015 12:45 PM
Ph: 403.258.3100 \ email:[e-mail] \ www.guardiantelecom.com

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 2
Table of Contents
Package Contents.................................................................................2
Overview...............................................................................................3
Features................................................................................................3
Installing the PSCU...............................................................................8
Field Repairs & Adjustments.................................................................8
Control Console DB25 Connector.......................................................10
Engineering Specifications..................................................................11
Warranty..............................................................................................12
Disclaimer ...........................................................................................12
Warning...............................................................................................12
Service Number ..................................................................................12
Feedback ............................................................................................12
Guardian Product Return....................................................................13
Table of Figures
Figure 1 - Dimensions...........................................................................4
Figure 2 - Back View.............................................................................4
Figure 3 - Features................................................................................5
Figure 4 - Circuit Board Features..........................................................7
Figure 5 - Wiring Table........................................................................10
Table 1 - Circuit Board Connections.....................................................6
Package Contents
(1) P9005 PSCU Paging System Control Unit
(1) Cable with DB25 connector
(1) Installation & Operation Manual

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 3
Overview
PSCU Paging System Control Unit
The custom made Guardian Paging System Control Unit (PSCU) is the main control console that
includes Gooseneck Microphone (785L) with push-to-talk switch, alarm activation and reset buttons
(with indicator lights), indicator lights for Digital Recorder (if system equipped), Pilot Tone Generator,
Backup Amplifier status and RF Failure indication. It also contains a built-in page system monitor
speaker with respective volume control. The PSCU is remote powered and connected to the main
system rack via a 25 conductor cable.
Features
16 gauge steel enclosure - zinc dichromate plated and powder coated
10 gauge steel faceplate - zinc dichromate plated and powder coated
Heavy duty gooseneck microphone
Ergonomic angled top deck
Three alarm channel activation buttons plus one reset button
PA system monitoring capability
Monitor speaker volume control
Remote device indication: RF Detector/Voice Recorder
Quick disconnect wiring harness
Large Push-to-Page (PTT) button
Internal telephone (RJ11) jacks for optional telephone termination

Guardian Telecom Inc. Installation and Operation
Model PSCU
220mm [8.7"]
151mm [6.0"]
298mm [11.7"]
203mm [8.0"]
Figure 1 - Dimensions
1
Figure 2 - Back View
DB25 Connector
Page 4

Guardian Telecom Inc. Installation and Operation
Model PSCU
21 4 3
5
6
7
8
10
11
12
9
RECORD PILOT BACKUP RF FAIL
OIL FIRE
RESET
VOLUME
Figure 3 - Features
Record Activation Indicator Light
(Console Power Indicator if not equipped with Recorder option)
Pilot Tone Generator Status Indicator Light
Backup Power Amplifier Activated Indicator Light
RF Detector Failure Indicator Light
PTT (Push-to-Talk) Button for PA Override + Recorder Control (if equipped)
Console Monitor Speaker Volume Control
Alarm Trigger #3
Alarm Trigger #2
Gooseneck Microphone
Alarm Trigger #1
⑪Alarm Reset Button
⑫Console Monitor Speaker
Page 5

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 6
Component Function
J15 (Dynamic) Microphone Input
R31 Potentiometer for high frequency cutoff adjustment
R22 Potentiometer for low frequency cutoff adjustment
J21 Microphone output signal
J20 Receiver indicator output (LED can be mounted)
J3 Page/Talk output indicator (when the Page/Talk button is pressed these contacts
J3-1; J3-2 are shorted)
J1 24V AC or DC input (pins 1 & 2)
F1 0.5 Amp fuse (fast blow)
S1 #3 alarm switch (contacts 1 - 5 of J5)
S2 #2 alarm switch (contacts 2 - 5 of J5)
S3 #1 alarm switch (contacts 3 - 5 of J5)
S4 Reset alarm switch (contacts 4 - 5 of J5)
J14 (Amplified) Page input signal
R28 Potentiometer for speaker volume adjust (on the PCB)
J19 Header for panel mount volume adjust speaker (R28 has to be removed)
J13 Speaker output
J4 Mute speaker (1 - 2 mute on, 2 - 3 mute off)
J2 Phone line 1 in (header) [optional usage]
J18 Phone line 1 out (RJ11) [optional usage]
J16 Phone line 2 in (header) [optional usage]
J17 Phone line 2 out (RJ11) [optional usage]
Table 1 - Circuit Board Connections

Guardian Telecom Inc. Installation and Operation
Model PSCU
Figure 4 - Circuit Board Features
Page 7

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 8
Installing the PSCU
Inspect the product for shipping damage.
Follow all appropriate electrical codes and use only approved electrical
fittings for the installation.
Tip: If the product is
damaged, notify the
carrier immediately.
Place the PSCU in the desired location.
Ensure that none of the electrical circuits are live.
Wire up to the Guardian System Rack.
Adjust the control console speaker volume potentiometer (R28) to the
desired volume level.
Adjust high and low frequency cut off filter potentiometers to desired levels.
The high frequency filter (potentiometer R31) can reduce any possible noise
on the PSCU monitor speaker. The low frequency filter (potentiometer R22)
can help reduce any possible distortion to the PSCU monitor speaker.
Test all input/outputs and audio according to system option configuration.
See: Figure 5 - Wiring
Table
See: Figure 4 - Circuit
Board Features
Field Repairs & Adjustments
This device has no user serviceable internal components; the only maintenance
possible is replacement of the fuse. See: Figure 4 - Circuit
Board Features
Fuse Replacement
Remove the top deck of the control console to access the fuse, which is
mounted on the PCB. Replace the blown fuse with new 0.5 amp 250V
2AG fast blow fuse. Re-assemble the top deck to the base and re-test.
WARNING!
Replace only with a 0.5 amp 250V 2AG fast blow fuse. Failure to do so will
void the warranty.
If the fuse fails again on reconnecting power, check the system wiring.

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 9
LED displays:
* Record LED: Digital Recorder ready display
* Pilot LED: Pilot Tone Generator in use display
* Backup LED: Backup Amplifier fail display
* RF fail LED: RF transceiver fail warning display
The following LED displays are integral to the Alarm switches.
* Oil LED (Alarm #1)
* Major LED (Alarm #2)
* Fire LED (Alarm #3)
Switches:
A. Alarm switches
There are three optional Alarm activating switches and one Alarm Reset switch.
The Oil (#1), Major (#2), and Fire (#3) Alarm switches are illuminated switches.
B. Push to Page switch
The Push to Page (PTP) switch is a heavy duty shrouded switch. Pressing the PTP switch will
activated the Microphone and the MIC Pre-amplifier.
Microphone:
The goose neck Microphone is the Paging Microphone that is designed to override telephone
accessed paging. Pressing the PTP switch will enable the Microphone and the Microphone
Pre-amplifier. A control signal from the PTP switch will activate a Digital Recorder (if
equipped).
Speaker and Volume Control:
The built-in speaker monitors the paging system output (from any activated zone). Its output is
controlled by the Volume Control Potentiometer.

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 10
Cable and Connector:
The PSCU is linked to the PA system through a DB25 connector. Its pin designation is defined
in the table below.
Control Console DB25 Connector
DB25 PCBA connectors DB25 wire colors Functions
Pin # Base/strip/strip
1 J1-1 RED 24VDC (POS)
2 J1-2 BLK 24VDC (NEG)
3 J5-1 RED/BLK FIRE SWITCH
4 J5-2 RED/BLK/ WH MAJOR SWITCH
5 J5-3 RED/GRN OIL SWITCH
6 J5-4 RED/WH RESET SWITCH
7 J5-5 BLK/RED GROUND
8 J6-1 ORG/RED FIRE LED
9 J7-1 ORG MAJOR LED
10 J8-1 ORG/GRN OIL LED
11 J8-2 ORG/BLK GROUND
12 J20-1 GRN/WH REC-EN
13 J20-2 GRN/BLK GROUND
14 J3-1 GRN PTT CONTACT A
15 J3-2 GRN/BLK/WH PTT CONTACT B
16 J19-1 BLU/WH RF FAIL LED
17 J10-1 BLU RECORD READY LED
18 J11-1 BLU/BLK PILOT TONE LED
19 J28-1 WH/BLK AUDIO AMP FAIL LED
20 J28-2 BLK/WH GROUND
21 J14-1 BLU/RED PAGE LINE TO CONSOLE A
22 J14-2 WH/RED/BLK PAGE LINE TO CONSOLE B
23 J21-1 WH MIC PRE-AMP O/P A
24 J21-2 WH/RED MIC PRE-AMP O/P B
25 J21-3 BLK/WH/RED GROUND
1) CONNECTOR ON THE BACK OF THE CONSOLE IS MALE.
2) CONNECTOR ON THE CABLE IS FEMALE. APPLY ON ONE END OF CABLE.
Figure 5 - Wiring Table

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 11
Engineering Specifications
POWER SUPPLY
VOLTAGE 24 VDC
FUSE 0.5 AMP;TYPE 2AG FAST BLOW
70 VPAGE LINE INPUTS
FREQUENCY RANGE 250 HZ TO 8KHZ
MICROPHONE PRE-AMP OUTPUT
FREQUENCY RANGE 250 HZ TO 8KHZ
SPEAKER OUTPUT
FREQUENCY RANGE 250 HZ TO 8KHZ
OUTPUT VOLUME 85 dB MAXIMUM
MIC LOGIC OUTPUT
OPEN DRAIN OUTPUT 60 VDC @400 mA MAXIMUM

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 12
Warranty
Guardian Telecom warrants your product to be free of defects in material and workmanship for a period
of one year. Guardian Telecom will repair or replace any defective unit that is under warranty free of
charge.
This warranty is null and void if any non-authorized modifications have been made to this product, or if
it has been subjected to misuse, neglect, or accident. This warranty covers bench repairs only; such
repairs must be made at Guardian Telecom or an authorized service depot. Guardian Telecom is not
responsible for costs incurred for on-site service calls, freight, or brokerage.
A return authorization must be obtained prior to warranty claims or repairs.
Disclaimer
The products covered by this manual are designed for use in Industrial Environments and/or Hazardous
Locations. Due to the range of possible applications for these instruments the manufacturer will not be
responsible for damages or losses of any kind suffered as a result of the use of this product, including
consequential damages.
Warning
This device has no user serviceable internal components; the only maintenance possible is the
replacement of the fuse – which is available inside on the PCB.
Service Number
1-800-363-8010
Guardian Telecom provides a customer service number which is toll-free within North America. If you
need assistance when installing or operating this product, please call the toll-free number between
regular business hours (8:00AM-5:00PM), Mountain Standard Time. If you are calling outside of regular
business hours, please leave a detailed message, and a member of Guardian Telecom’s Service
Department will return your call as soon as possible. If your product requires service, Guardian
personnel will supply you with an RMA (return materials authorization) number over the or through our
web site product return page. This number must be included with your return address and the name of
the person to contact.
Guardian Telecom Inc.
Toll-free 1-800-363-8010
Ph. [phone]
Fax. [phone]
www.guardiantelecom.com
Feedback
Guardian Telecom continually strives to make reliable, durable, and easy to use products. If you, as an
installer or user of our equipment, have any suggestions for improvements to this or any of our products
or documents, including this manual, we would appreciate hearing from you.

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 13
Guardian Product Return
Guardian products have been quality tested and are in full working order when shipped from
the factory, given the rugged nature of these products shipping is not expected to damage a
unit. In the unlikely event of a malfunction, Guardian follows the three step procedure below.
Step I - On-Site Correction
The most common source of difficulties with a new product is improper installation in one of
two ways: incorrect wiring connections or connection to an incorrect power source.
Product wiring needs to be properly connected to the on-site wiring. Correct wiring
instructions are shown in the user manual included with the product.
Step II - Return Materials Authorization (RMA)
When a product has been installed following user manual instructions, and the unit fails to
operate, the user must contact Guardian Telecom to obtain authorization to return the
product. This can be done by completing a RMA form online at
www.guardiantelecom.com, or by calling the service number given in this manual.
After providing information on the product, the owner and the nature of the problem,
Guardian will issue a RMA number, to be shown on documentation returned with the
product.
In addition to the RMA number, shipping documents should include name, address and
number of the owner along with contact information for the person responsible for the
repair and/or the user who identified the malfunction.
(Where a product is being returned for repair from outside of Canada, customs
documentation must show the product’s serial number, date of export [date of purchase],
and a notation that the equipment is: “Canadian goods returning.”)
Step III - Factory Authorized Service
Once received, each product is carefully inspected and tested. If the product is under
warranty, repairs are completed and the product returned to the owner, generally within
five working days of receipt by the factory.
A product that has been subjected to misuse, neglect or accident or is beyond the warranty
period will be evaluated. The service department will provide the owner’s representative
with a repair cost estimate. Once approved, repairs are completed and the product
returned, generally within five working days.

Guardian Telecom Inc. Installation and Operation
Model PSCU
Page 14
Notes:
Model No.
Part No.
Serial No.
Date of Purchase

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Guardian Telecom Inc.
Toll-free 1-800-363-8010
Phone [phone]
Fax. [phone]
www.guardiantelecom.com
E-mail: mailto:[email protected]
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CONNECTED. PROTECTED.
© Guardian Telecom Inc. 2015