HC Bridge SRC
User Guide
REVISION: 1.1

HC Bridge SRC User Guide

Contents®

Begbroke, Oxford, England, OX5 1RU • +44 (0)1865 842300
545 8th Avenue, Suite 2110, New York, NY, 10018, USA • +1 (1) 212 315 1111
19801 Nordhoff Place, Unit 108 Chatsworth, CA 91311 • +1 (1) 213 249 9229
3-55-14 Sendagaya, Shibuya-Ku, Tokyo 151-0051, Japan • +81 (0)3 5474 1144
7 bis, rue de la Victoire, le Blanc Mesnil, Paris 93150, France • +33 (0)1 48 67 84 85

Visit SSL® at: www.solidstatelogic.com© Solid State Logic
All Rights reserved under International and Pan-American Copyright Conventions
SSL and Solid State Logic are ® registered trademarks of Solid State Logic
System T™, Network IO™, Netbridge™ , SuperAnalogue™,Eyeconix™ are ™ trademarks ofSolid State Logic
Dante™ and Audinate™ are ® registered trademarks of Audinate Pty Ltd
All other product names and trademarks are the property of their respective owners and are hereby
acknowledged.

No part of this publication may be reproduced in any form or by any means, whether mechanical orelectronic, without the written permission of Solid State Logic, Oxford, OX5 1RU, England.
As research and development is a continual process, Solid State Logic reserves the right to change
the features and specifications described herein without notice or obligation.
Solid State Logic cannot be held responsible for any loss or damage arising directly or indirectly fromany error or omission in this manual.
PLEASE READ ALL INSTRUCTIONS, PAY SPECIAL HEED TO SAFETY WARNINGS.
E&OE

Document Revision History
FIRST DRAFTSECOND RELEASE

JAN 2020
Rev 1.1 Formatting corrections

JULY 2020

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HC Bridge SRC User Guide

Contents

Table of ContentsHC Card ResetIntroduction

4Overview

4Key Features

4HC Bridge SRC Front Panel

4HC Bridge SRC Rear Panel

4Status LEDs and User Buttons

5Hardware Connections

67Appendix A – Physical Specifications

8Appendix B - GPIO Connector Pin Outs

9GP Inputs

9GP Outputs

10

Appendix C – Safety Notices

11General Safety

11

Installation Notes

11

Power Safety

12For EU

12

Mains Power Connections

6

Dante Connections

6HC Link Audio Transport Connections

6GPIO

6

Environmental Declaration

13

Usage Cases

7RoHS Notice

13For USA

13

Electromagnetic Compatibility

13

Environmental

13

Standalone Sample Rate Conversion ofDante Sources

7

Connection of Dante Devices Operating ata Different Sample Rate
7
Tie Lines to a Second Dante Domain
Dante Controller

77

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HC Bridge SRC User GuideContents

Introduction
Overview
The HC Bridge SRC provides 256 bi-directional channels of sample rate conversion for use withDante networks. The 1U unit contains two Dante HC cards which can each independently set sample
rate. When used in a standalone configuration this facilitates the routing of audio between devices
running at different sample rates or in different clock domains on a Dante, AES67 or ST 2110-30
network. The two network connections can be physically or virtually separate networks, providing
control isolation between two sets of equipment where an “AoIP discovery and control firewall” isrequired.
Connections from each Dante HC card to the Dante network are made through front-facing SFPs,
which can be fitted with RJ45, single-mode or multi-mode LC fibre connectors. Connections from theSFP cages on the rear are looped between the two Dante HC cards to provide a standalone 256
channel Dante SRC device.
The HC Bridge SRC also contains 12 pairs of GPIO for use with connected System T consoles.

Key Features●●●●●●Standalone sample rate conversion of Dante and AoIP sources between two sample rates
AoIP discovery and control “firewall” between physically or virtually separate networks
12 pairs of GPIO for use with a System T
Redundant PSUs and Dante network connections
Front facing Dante network connections
Rear facing HC Link and GPIO connections

HC Bridge SRC Front Panel
Status LEDsand User
Buttons

HC Card 1 Dante ports

HC Card 1 USB
Program port(service use only)

HC Card 2 Dante ports

HC Card 2 USB
Program port
(service use only)

HC Bridge SRC Front Connections

HC Bridge SRC Rear Panel

HC Link 2 SFP cages

Status LEDs

Status LEDs

HC Link 1 SFP cages

GP Inputs 1-12

GP Outputs 1-12

Cooling fan

Redundant PSUs

HC Bridge SRC Rear Connections

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Status LEDs and User Buttons
LK1 S and LK2 S indicate thecurrent sync status of therespective HC card:

SRC 1 and SRC 2indicate the SRC
status of therespective HCcard:

NET1 S and NET2 S indicate the current sync statusof the respective HC card:

Green (flashing) - Resyncing

Green (solid) SRC on

Red (solid) - No sync, primary AND secondary
Dante connections inactive

Red (solid) - No sync

Red (solid) Audio muted

Red-green (flashing) - Primary OR secondary
connection to Dante network inactive

Off - HC card not set to sync toincoming HC Link audio data

Off - SRC off

Off - HC card not set to sync to incoming Dante
network clock

Green (solid) - Synced to incoming
HC Link audio data

Green (solid) - Synced to incoming Dante network
Green (flashing) - Resyncing

Green - normal operation,both power supplies
activeRed - primary or
secondary power supply
inactive

Pressing 1A or 2A toggles
whether the respective HCcard syncs to the incoming
HC Link audio data orDante network

Pressing 1B or 2B
toggles the SRC
on/off for therespective HC card

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Hardware Connections
Mains Power Connections
The HC Bridge SRC includes redundant PSUs with IEC connectors,
either supply can individually power the unit. Ideally these should
be connected to separate power circuits to provide redundancy ofincoming AC power.

Dante ConnectionsHC Card 1 Dante port primary andsecondary SFP cages can be fittedwith either RJ45, single-mode or
multi-mode LC fibre connectors

HC Card 1 USB
Program port
(service use only)

HC Card 2 Dante port primary andsecondary SFP cages can be fittedwith either RJ45, single-mode or
multi-mode LC fibre connectors

HC Card 2 USB
Program port
(service use only)

HC Link Audio Transport Connections
HC Card 1 Dante port primary andsecondary SFP cages can be fittedwith either RJ45, single-mode or
multi-mode LC fibre connectors

HC Card 1 USB
Program port
(service use only)

HC Card 2 Dante port primary andsecondary SFP cages can be fittedwith either RJ45, single-mode or
multi-mode LC fibre connectors

HC Card 2 USB
Program port
(service use only)

GPIO
12 General Purpose opto-coupled inputs and 12 General Purpose relay
outputs are available for use with a connected System T console.
N.B. These GPIO are only available to a System T console connected tolink 1.
See Appendix B for pinout information.

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HC Bridge SRC User GuideContents

Usage Cases
N.B. The following diagrams omit secondary network connections for clarity.

Standalone Sample Rate Conversion of Dante Sources
The HC Bridge SRC contains two independent Dante HC cards. These each offer 256 channels ofconversion between Dante network audio and serial audio data with SRC functionality. With one HC
card set to a sample rate of 48 kHz and the second set to 96 kHz, when the serial audio data
connections are looped between the two Dante HC cards this provides 256 channels of sample rate
conversion in each direction.
A Dante network can contain devices operating at different sample rates, but only devices operating
at the same sample rate can have routes made between them. Using the HC Bridge SRC as astandalone sample rate converter provides a go-between for routing a large number of channels
across devices running at different sample rates.
Both Dante HC cards will appear on the Dante network. Audio routed to one Dante HC card will beavailable for routing from the corresponding output of the second Dante HC card at the new sample
rate.

Connection of Dante Devices Operating at a Different Sample Rate
With SRC functionality enabled each Dante HC card can convert incoming Dante network audio tothe sample rate of a connected HC Link card in a Tempest Engine.
For example, a Dante network may have some I/O devices running at 48 kHz and others at 96 kHz.
A System T console running at 48 kHz would only be able to route audio to and from the devices at48 kHz. With an HC Bridge SRC containing an HC card set to 96 kHz it would become possible toroute 256 channels to and from the Dante devices running at 96 kHz. Setting both Dante HC cards
within the HC Bridge SRC to 96 kHz would double the channel count to 512 channels.

Tie Lines to a Second Dante DomainWith no clocking dependence. For operational or security reasons a facility may have multiple Dante
Networks. These may not be clocked from the same systems.
N.B. This is not to be confused with Dante Domain Manager and shared audio between domains.
However Network I/O HC bridge SRC can easily be used to provide tie lines between DDM managed
Dante domains with different clocking.

Dante Controller
HC Card Reset
Resetting the Dante HC cards to default settings is performed from Dante Controller. Under the‘Device Config’ tab for a device select ‘Clear Config’. This clears the device name, channel labels, IPaddress settings, sample rate, latency, and existing audio routes.

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Appendices
Appendix A – Physical Specifications
HC Bridge SRC
Height

1RU, 44.5mm (1.75”)

Width483mm (19”)

Depth

340mm (13.4”)

Weight4.5kg

Power<100W

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Appendix B - GPIO Connector Pin Outs
GP Inputs
Inputs are triggered by applying an AC or DC voltage of between 4V and 24V. The current drawn isapproximately 10mA. Minimum input pulse duration 50mS.

GP Inputs
Connector Type:25-way D-type male

PinDescription

Notes:

Input
1A
Input
1B
Input
2A
Input
2B
Input
3A
Input
3B
Input
4A
Input
4B
Input
5A
Input
5B
Input
6A
Input
6B
Input
7A
Input
7B
Input
8A
Input
8B
Input
9A
Input
9B
Input
10A
Input
10B
Input
11A
Input
11B
Input
12A
Input
12B
0V Common

See input requirements above

1142153164175186197208219221023
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GP Outputs
All output switch closures are via DIL relay.
DO NOT use these outputs to directly switch capacitive or reactive loads; ALWAYS use a separate
external relay with suitable contact rating.
DIL Relay Ratings:• 100V DC, 125V AC• 100mA max.
GP Outputs
Connector Type:25-way D-type Female

PinDescription

Notes:

Output1A
Output1B
Output2A
Output2B
Output3A
Output3B
Output4A
Output4B
Output5A
Output5B
Output6A
Output6B
Output7A
Output7B
Output8A
Output8B
Output9A
Output9B
Output10A
Output10B
Output11A
Output11B
Output12A
Output12B+12V Output

450 mA maximum

1142
153
164
17518
619
720
821
922
1023
1124
1225
13

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Appendix C – Safety Notices
General Safety1.

Please read and keep this document.

2.

Adhere to all warnings and follow instructions.

3.

This electrical equipment should not be used near water.

4.

Cleaning should only be with dry cloths or products compatible with electrical devices –never when the unit is powered.

5.

Keep the unit free of dust and use in a clean environment.

6.

Do not use near any heat source or in direct sunlight.

7.

Do not use near naked flames.

8.

Do not place heavy objects on the unit.

9.

Only use attachments/accessories recommended by the manufacturer.

10.

Unplug the device during lightning storms or long periods of non-use.

11.

The unit can only be serviced by qualified personnel – Seek immediate service if:
I.
The unit has been exposed to moistureII.
The unit has been dropped
III.
The unit does not operate normally

12.

Do NOT modify this unit – alterations may affect performance, safety, and/or international
compliance standards.

13.

SSL does not accept liability for damage caused by maintenance, repair, or modification by
unauthorised personnel.

Installation Notes
1.

When installing this apparatus either fix it into a standard 19” rack or place the apparatus
on a secure level surface.

2.

When this apparatus is rack mounted, fit all rack screws. Rack shelves are recommended
for this apparatus.

3.

Allow a 1U gap above and below this apparatus for cooling.

4.

Do not obstruct any ventilation cut-outs or exhaust fans.

5.

Ensure that no strain is placed on any cables connected to this apparatus. Ensure that all
such cables are not placed where they can be stepped on, pulled, or tripped over.

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Power Safety
1.

The unit is not supplied with a mains lead allowing you to use IEC distribution of mains
cables of your choice. Any mains cable used must fulfil the following:
I.
Refer to the ratings label on the rear of the unit and always use suitable mainscords.
II.
The unit should ALWAYS be earthed with the earth on both the IEC sockets (whenboth are used).
III.
Please use - compliant 60320 C13 TYPE SOCKETS. When connecting to supply
outlets ensure that appropriate sized conductors and plugs are used to suit local
electrical requirements.
IV.
Maximum cord length should be 4.5m (15’).
V.
The cord should bear the approval mark of the country in which it is to be used.

2.

The appliance coupler is used as the disconnect device, ensure that it is connected to an
unobstructed wall outlet.

3.

The mains inlets are designed for connection to a single phase AC supply however each
inlet can safely be connected to a separate phase of a three phase mains supply.
Warning: if connected to separate phases up to 400V potential phase to phase may bepresent.

4.

The clear markings regarding redundant power supplies detailed on the unit must betransferred into the installation to ensure both power sources are removed before qualified
personnel service the unit.

GBThe apparatus shall be connected to mains socket outlets with a protective earthing
connectionDEN

Apparatets stikprop skal tilsluttes en stikkontakt med jord, som giver forbindelse tilstikproppens jordFIN

Laite on liitettävä suojamaadoituskoskettimilla va rustettuumpistorasiaan

NOR

Apparatet må tikoples jordet stikkontakt

SWE

Apparaten skall anslutas till jordat uttag

ATTENTION! This equipment must be Earthed. Refer to manual for installation
instructions.
CAUTION! Disconnect all power sources before removing any panel (s). No userserviceable parts inside – to be serviced only by qualified personnel.
WARNING! Un-Earthed metal parts may be present inside enclosure. Check forhazardous voltages before touching.
For protection against risk of fire – replace only with same type / rating of fuse. Donot expose to rain or moisture.

For EUThe stagebox is CE compliant and fully conforms with the current protection requirementsof the European community council directives on EMC and LVD. Note that any cables
supplied with SSL equipment may be fitted with ferrite rings at each end. This is to comply
with the current regulations and these ferrites should not be removed. Any modifications
to this equipment may adversely affect the CE compliance of this product.

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Environmental Declaration
The symbol shown here, which is on the product or its packaging, indicates that thisproduct must not be disposed of with other waste. Instead, it is the user’s responsibility todispose of their waste using a designated collection point for recycling of waste electricaland electronic equipment. The separate collection and recycling of your waste equipment
at the time of disposal will help to conserve natural resources and ensure that it isrecycled in a manner that protects human health and the environment. For more
information about where you can dispose of your waste equipment for recycling, please contact yourlocal city office, your household waste disposal service or where you purchased the product.

RoHS Notice
Solid State Logic has conformed and this product has conformed to European Union’s Directive
2011/65/EU on Restrictions of Hazardous Substances (RoHS) as well as the following sections ofCalifornia law which refer to RoHS, namely sections 25214.10, 25214.10.2, and 58012, Health andSafety Code; Section 42475.2, Public Resources Code.

For USATo the User:
1. Do not modify this unit! This product, when installed as indicated in the instructions
contained in the installation manual, meets FCC requirements.
2. Important: This product satisfies FCC regulations when high quality shielded cables are used
to connect with other equipment. Failure to use high quality shielded cables or to follow theinstallation instructions may cause magnetic interference with appliances such as radios andtelevisions and will void your FCC authorisation to use this product in the USA.
3. Note: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in acommercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.

Electromagnetic Compatibility
EN55103-1:2009, EN55103-2:2009 Environments E1, E2, E3 and E4
Typical average initial in-rush current: ___ Typical peak in-rush current: ___.
The audio input/output and network ports are screened-cable ports and any connections to themshould be made using braid-screened cable and metal connector shells in order to provide a low
impedance connection between the cable screen and the stagebox. All network connections should
be of Cat5e standard or above.

Environmental
Temperature
Vibration
Shock

Operating: +5 to 40 deg. C
Operating: < 0.2 G (5–200 Hz)
Operating: < 3 G (11 ms max.)

Storage:-20 to 50 deg. C
Non-operating: < 0.4 G (5–200 Hz)
Non-operating: < 10 G (11 ms max.)

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