TC Communications TC8927 User Manual

TC8927

6+2-Ch. Paging System

w/ Dry Contact

User Manual

MNL-89270-01-00

TC Communications
17881 Cartwright Road
Irvine, California U.S.A. 92614
Tel. [phone]
Fax [phone]
E-Mail: sales @tccomm.com
Website: tccomm.com

All Rights Reserved
Copyright © 2019 by TC Communications. Products described in this publication are protected
by one or more U.S. and foreign patents.

Trademarks

The TC Communications® logo is a registered trademark.

JumboSwitch® is a registered trademark of TC Communications.

Other product and brand names may be trademarks or registered trademarks of their respective owners.

Documentation Disclaimer

This document is provided “as-is” and is to be used only as a general guide. TC Communications disclaims all
warranties, express or implied, regarding the accuracy of the information. TC Communications shall not be liable for
any indirect, special, incidental, or consequential damages (including damages for loss of business, loss of profits,
loss of business information, business interruption or other pecuniary loss) arising out of errors in this document.

The information given in this document is reviewed regularly and any necessary corrections will be included in
subsequent editions. We appreciate any suggested improvements. We reserve the right to make technical
improvements without notice.

Dissemination or reproduction of this document, or evaluation and communication of its contents, is not authorized
except where expressly permitted. Violations are liable for damages. All rights reserved, particularly for the
purposes of patent application or trademark registration. This document contains proprietary information, which is
protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced or
translated to another language without the prior written consent of TC Communications.

Record of Revisions

Revision Date Description of Changes

1.0

2 TC8927 Rev 1.0 User Manual

06/04/19 Initial Release of TC8927.

Guide to Alert Symbols

These alert symbols are used in Caution, Warning, and Danger notes.

Symbol Meaning

Pinching or crushing hazard

Electrical hazard.

Equipment alert: be careful of
damage from static electricity

General alert: used for all
other hazardous conditions
(referring to people, not
equipment).

TC8927 Rev 1.0 User Manual 3

TABLE OF CONTENTS

1Introduction

1.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.2.2 Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

2 Installation

2.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.3 Equipment Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.4 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.5 Dry Contact Alarm Relay (DCAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.6 System Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.7 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.7.1 Front Panel (Analog Pin Assignments) . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.7.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.7.3 Electrical Signal Interface Connection & Pin Assignments . . . . . . . . 2-6

5 Troubleshooting

5.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 All LEDs are OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.3 Alarm LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Appendix A 19” Rack Mount Card Cage

A.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.3 Chassis Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Appendix B Return Policy

B.1 Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

B.1.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

B.1.2 Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

TOC-1 TC8927 Rev 1.0 User Manual

Chapter 1 Introduction

In this chapter:

• Product Description, on page 1-1

• Specifications, on page 1-5

1.1 General Information

This manual is intended to describe the features and functionality in addition to
aiding in the planning, configuring, commissioning and maintaining of the
TC8927 Paging System with Dry Contact.

1.2 Product Description

The TC8927 bridges/broadcasts analog audio and dry contact from a central location
to remote sites. An incoming analog/dry contact signal coming into the primary host
port will be broadcast to 6 slave ports. A backup host port is available for
redundancy. The dry contact channel is typically used to actuate the end equipment
to broadcast the audio. When both Primary and Backup host ports receive signal,
Primary will take precedence.

Diagnostic LEDs are available to quickly identify issues with your analog lines.

Figure 1-1 TC8927 6+2 Channel Paging System with Dry Contact

TC8927 Rev 1.0 User Manual 1-1

Chapter 1 Introduction Product Description

Figure 1-2 TC8927 Front Panel LED Definitions

1-2 TC8927 Rev 1.0 User Manual

Chapter 1 Introduction Product Description

Figure 1-3 TC8927 Rear Panel LED Definitions

1.2.1 Features

• 2 Channel Inputs as Host Ports

6 Channel Outputs as Slave Ports

• Modular Design with 8 Channels per Module

• 64K Full Bandwidth Voice Transport

• Passes All Tones used for FSK, EIA Tone Control/Remote and Paging

• Supports Pilot/Guard Tone Operation

• Optional Power Redundancy

• 1U or 4U Rack Mount or 1S Standalone Chassis

• 12VDC, 24VDC, -48VDC, 125VDC

TC8927 Rev 1.0 User Manual 1-3

Chapter 1 Introduction Product Description

• LEDs for Analog Volume, Alarm Status, Channel Release Tone, and
Loopback

1.2.2 Applications

The TC8927 bridges/broadcasts analog audio and dry contact from a central location
to remote sites.

Figure 1-4 Typical Application using the TC8927

1-4 TC8927 Rev 1.0 User Manual

Chapter 1 Introduction Specifications

1.3 Specifications

Connection Capacity

600Ω (4-Wire) 2 ports (Host), 6 ports (Slave)

Dry Contact 2 ports DCD (Host), 6 ports DCC (Slave)

Electrical

Analog/Dry Contact Connector RJ-11

Impedance 600Ω

System

Visual Indicators System: PWR A, PWR B, Vcc, ALM

Paging: P#, R-Tone

Channel Status:

TX (1 each Ports 1-8)

RX (1 each Ports 1-8)

Diagnostic Functions Local Loopback

Power Source

Standard 12VDC @500mA

Optional 24VDC, -48VDC, 125VDC, or 100/240VAC

Temperature

Operating -10°C to 50°C

(Optional Hi-Temp Version) -20°C to 70°C

(Optional Extreme-Temp Version) -40°C to 80°C

Storage -40°C to 90°C

Humidity 95% non-condensing

TC8927 Rev 1.0 User Manual 1-5

Chapter 1 Introduction Specifications

Physical (Rack mount 1U “Pizza Box”)

Height (4.3 cm) 1.7"

Width (48.3 cm) 19"

Depth (26.7 cm) 10.5"

1-6 TC8927 Rev 1.0 User Manual

Chapter 2 Installation

In this chapter:

• Power Supply, on page 2-2

• System Configuration, on page 2-2

2.1 General Information

The installation section describes how to:

• Unpack the unit

• Ensure an optimum site location

• Install the power supply and dry contact connection

2.2 Unpacking

Before unpacking any equipment:

• Inspect all shipping containers for evidence of external damage caused during
transportation

• Inspect for damage after it is removed from the containers

IMPORTANT

Any claims concerning shipping damage should be made directly to
the pertinent shipping agencies. Any discrepancies should be
reported immediately to the Customer Service Department at TC
Communications, Inc. at [phone].

2.3 Equipment Location

The TC8927 should be located in an area that provides adequate light, work space
and ventilation.

Important

Avoid locating it next to any equipment that may produce electrical
interference or strong magnetic fields, such as elevator shafts or
heavy duty power supplies.

As with any electronic equipment, keep the unit from excessive
moisture, heat, vibration and freezing temperatures.

TC8927 Rev 1.0 User Manual 2-1

Chapter 2 Installation Power Supply

2.4 Power Supply

The TC8927 can be powered by external DC power. Available
power options are 12 VDC, 24 VDC, -48 VDC, and 125 VDC.
There are two terminal block connectors labeled "PWR A" and
"PWR B" only one is required to power up the unit. Since each
TC8927 card is equipped with a power redundancy capability,
the power LEDs on the front panel will light according to
which power jack (A or B) is connected. Both LEDs will light when power
redundancy is utilized.

Important

Read and only connect a supply voltage that corresponds to the
type plate of your device. Make sure that the contact load capacity
of the signal contact is not exceeded.

2.5 Dry Contact Alarm Relay (DCAR)

A terminal block connector at the rear panel provides for the Dry Contact Alarm
Relay. This relay can be used in NO (Normal Open) or NC (Normal Close)
configuration.

When used in NO (Normal Open) configuration, the relay will close if the unit loses
power completely or the Alarm is on. The relay remains open during normal
operation.

When used in NC (Normal Close) configuration, the relay will open if the unit loses
power completely or the Alarm is on. The relay remains close during normal
operation.

2.6 System Start Up

Apply the power by plugging the power plug into a power jack (both PWR A &
PWR B for dual power units).

After power is applied, all LEDs (except PWR & VCC LEDs) will flash
momentarily and the following LED status should be observed from the front and
back panels:

1. The Power "A" and/or "B" and VCC LEDs should be lit.

2.7 System Configuration

The TC8927 has been pre-tested and switches have been set per factory
specifications.

2-2 TC8927 Rev 1.0 User Manual

Chapter 2 Installation System Configuration

8 RJ-11 Connectors for
Analog connections
(refer to pin assignments
in following sections)

2.7.1 Front Panel (Analog Pin Assignments)

Figure 2-1 TC8927 Front Panel Analog & Dry Contact Connectors

2.7.2 Rear Panel

Figure 2-2 TC8927 Rear Panel (Main & Extension)

TC8927 Rev 1.0 User Manual 2-3

Chapter 2 Installation System Configuration

2.7.2.1 Rear Panel DIP Switch Functions

The DIP switch functions on the TC8927 are described below. To activate the
function, set the appropriate switch to the “On” (Up) position.

• LOCLB: Local Loopback. This switch (SW1) initiates the Local Loopback
function. The analog signals are received on the “RX Data” pins and looped
back to the ”TX Data” pins for diagnostic testing.

Local Loopback Test (for 4-Wire analog only)

When the rear panel SW1 (LOCLB) in the “On”(Up) position the analog signals are
received on the “Input” pins and looped back to the ”Output” pins on the TC8927.

1. The “TX” LED will be flashing green for that particular channel being tested
and the "ALM" alarm LED will flash to indicate that the unit is in local
loopback mode. (Note, the RX LED will be solidly lit green when an analog
signal is detected.)

2. The Customer’s Analog Device should receive a 6dBm lower audio signal
back as that of the transmitted signal.

3. Upon successful completion of this test, please return DIP switch
SW1(LOCLB) to the “Off” (Down) position..

• P#: Paging Number. This switch (SW2) is used to enable the two channels
broadcast function. "Off" (Down) for only allow single channel to broadcast.
"On" (Up) allows two channels to broadcast simultaneously.

2-4 TC8927 Rev 1.0 User Manual

Chapter 2 Installation System Configuration

• R-Tone: Channel Release Tone. This switch (SW3) is used to enable the unit
to generate a tone after a channel is release (Stop broadcasting). "Off" (Down)
will disable the channel release tone. "On" (Up) will enable the channel
release tone.

• Mode: 8/16 Channel Mode. This switch (SW4) is used to setup the number of
Channels. "Off" (Down) is for 8 channels mode. "On" (Up) is for 16 channels
mode.

• T1, T2: Channel Release Time. These switches are used to set the channel
release time (stop broadcasting) after the channel stop receiving audio.

SW5, SW6: Channel Release Time

T1 T2 Release Time

Down Down 0.6 sec

Up Down 0.8 sec (Default)

Down Up 1.0 sec

Up Up 1.2 sec

• V1, V2: Output (Tx) Volume. These switches are used to set the output
volume for all the channels.

SW7, SW8: Output (Tx) Volume

V1 V2 Volume

Down Down -16 dB

Up Down -10 dB

Down Up -6 dB

Up Up 0 dB (Default)

TC8927 Rev 1.0 User Manual 2-5

Chapter 2 Installation System Configuration

6543 12

6543 12

2.7.3 Electrical Signal Interface Connection & Pin Assignments

The RJ-11 connectors are located at the front panel of the TC8927.

600Ω Analog Connections

RJ-11 600Ω Analog 4-Wire Port Pin Assignment (Host Ports)

1 Detector Input

RJ-11 Jack

2 Output RING

3 Input RING

4 Input TIP

5 Output TIP

6 Detector Input (GND)

RJ-11 600Ω Analog 4-Wire Port Pin Assignment (Slave Ports)

1 Relay Output

RJ-11 Jack

2 Output RING

2-6 TC8927 Rev 1.0 User Manual

3 Input RING

4 Input TIP

5 Output TIP

6 Relay Output

Chapter 5 Troubleshooting

5.1 General

Under normal operation, PWR, and Vcc LEDs should be lit.

5.2 All LEDs are OFF

If no LEDs are lit on the unit, check the DC power supply, connector plug, and/or
the power source. If the problem persists, contact the Technical Support Department
at TC Communications, Inc. @ [phone].

5.3 Alarm LED

Alarm conditions occur whenever local loopback is enabled and the ALARM LED
will flash.

TC8927 Rev 1.0 User Manual 5-1

Appendix A 19” Rack Mount Card Cage

   µ       FP 

   µ       FP 

 µ        FP 

  µ      FP 

1U Chassis

A.1 Features

• 1U height (1.75")

• Universal Power Supply Accepts 90V to 264V AC and 47 to 63 Hz AC

• Standard Power Supply is 12VDC, Optional 24VDC, -48VDC, 125VDC, or
AC Power Supply Available

• Over Load & Short Circuit Protection

A.2 Description

This 1U "Pizza Box" Rack Mount Card Cages hold up to 2 single multiplexer type
cards.

It operates with one power supply. The AC power supply automatically adjusts for
90V to 264V AC input and 47 to 63 Hz operation. The DC power supply accepts
24VDC, -48VDC, or 125VDC input (Optional).

This 1U rack assembly is 19" wide by 1.75" high, and is 9" deep.

A.3 Chassis Ground

The Stand alone and Rack mount chassis provide a connection point for chassis
ground with a dedicated chassis ground screw and lock washer. The chassis ground
screw is located on the rear side of the chassis. This chassis ground connection point
is available in case chassis ground is taken into design consideration by the end user.

TC8927 Rev 1.0 User Manual A-1

Appendix B Return Policy

B.1 Return Policy

To return a product, you must first obtain a Return Material Authorization number
from the Customer Service Department. If the product’s warranty has expired, you
will need to provide a purchase order to authorize the repair. When returning a
product for a suspected failure, please provide a description of the problem and any
results of diagnostic tests that have been conducted.

B.1.1 Warranty

Damages by lightning or power surges are not covered under this warranty.

All products manufactured by TC Communications, Inc. come with a five year
(beginning 1-1-02) warranty. TC Communications, Inc. warrants to the Buyer that
all goods sold will perform in accordance with the applicable data sheets, drawings
or written specifications. It also warrants that, at the time of sale, the goods will be
free from defects in material or workmanship. This warranty shall apply for a period
of five years from the date of shipment, unless goods have been subject to misuse,
neglect, altered or destroyed serial number labels, accidents (damages caused in
whole or in part to accident, lightning, power surge, floods, fires, earthquakes,
natural disasters, or Acts of God.), improper installation or maintenance, or
alteration or repair by anyone other than Seller or its authorized representative.

Buyer should notify TC Communications, Inc. promptly in writing of any claim
based upon warranty, and TC Communications, Inc., at its option, may first inspect
such goods at the premises of the Buyer, or may give written authorization to Buyer
to return the goods to TC Communications, Inc., transportation charges prepaid, for
examination by TC Communications, Inc. Buyer shall bear the risk of loss until all
goods authorized to be returned are delivered to TC Communications, Inc. TC
Communications, Inc. shall not be liable for any inspection, packing or labor costs
in connection with the return of goods.

In the event that TC Communications, Inc. breaches its obligation of warranty, the
sole and exclusive remedy of the Buyer is limited to replacement, repair or credit of
the purchase price, at TC Communications, Inc.’s option.

TC8927 Rev 1.0 User Manual B-1

B Return Policy Return Policy

To return a product, you must first obtain a Return Material Authorization (RMA)
number and RMA form from the Customer Service Department. If the product’s
warranty has expired, you will need to provide a purchase order to authorize the
repair. When returning a product for a suspected failure, please fill out RMA form
provided with a description of the problem(s) and any results of diagnostic tests that
have been conducted. The shipping expense to TC Communications should be
prepaid. The product should be properly packaged and insured. After the product is
repaired, TC Communications will ship the product back to the shipper at TC's cost
to U.S. domestic destinations. (Foreign customers are responsible for all shipping
costs, duties and taxes [both ways]. We will reject any packages with airway bill
indicating TC communications is responsible for Duties and Taxes. To avoid
Customs Duties and Taxes, please include proper documents indicating the
product(s) are returned for repair/retest).

B.1.2 Limitation of Liability

1. In no event shall the total liability of T C COMMUNICATIONS, INC. to
purchaser and/or end user for all damages including but not limited to
compensatory, consequential and punitive damages, exceed the total amount
paid to T C Communications, Inc. by purchaser for the goods from which the
claim arose, in no event shall T C COMMUNICATIONS, INC. be responsible
for indirect and consequential damages.

2. In no event shall liability attached to T C COMMUNICATIONS, INC. unless
notice in writing is given to T C COMMUNICATIONS, INC. within ten days
of the occurrence of the event giving rise to such claim.

3. T C COMMUNICATIONS, INC. shall not be responsible for delays or non­deliveries directly or indirectly resulting from or contributed to by foreign or
domestic embargoes, seizure, fire, flood, explosion, strike, act of God,
vandalism, insurrection, riot, war, or the adoption or enactment of any law,
ordinances, regulation, or ruling or order or any other cause beyond the control
of T C COMMUNICATIONS, INC.

4. T C COMMUNICATIONS, INC. shall not be responsible for loss or damage
in transit and any claims for such loss or damage shall be filed by the purchaser
with the carrier.

B-2 TC8927 Rev 1.0 User Manual

Index

C

cabling, 2-2

D

DCAR, 2-2

E

electrical, 5-1

environmental

requirements, 2-1

F

front panel, 2-2

W

web

interface, 1-5

M

mechanical

installation, 2-2

P

power

unit, 2-2

S

specifications, 1-5

T

troubleshooting, 5-1

U

unpacking, 2-1

TC8927 Rev 1.0 User Manual Index-1