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Catalyst 2955 Hardware Installation Guide
78-14944-03
Chapter 4 Installation in a Hazardous Environment
Wiring the External Alarm Device Relays
Warning
The switch relays are rated at 1 Amp and have a voltage limit of 30 VDC and 0.3
Amp at a voltage limit of 125 VAC. It is dangerous to exceed these limitations in
a hazardous environment.
An electrical arc can occur when you connect or disconnect the relay wires
with field side power applied. This could cause an explosion in switch
installations in a hazardous location. Before proceeding, be sure that power is
removed or the area is not hazardous.
Statement 1061
.
Note For wire connections to the power and relay connector, you must use UL and CSA
rated, style 1007 or 1569 twisted-pair copper appliance wiring material (AWM)
wire (such as Belden part number 9318).
You must also use the ferrite that ships with the switch.
After you have completed the wiring for the DC power connections, follow these
steps to wire the switch to an external alarm device:
Note This procedure is optional.
Step 1 Measure one strand of twisted-pair wire (18 to 20 AWG) long enough to connect
to the external alarm device.
Step 2 Use a wire stripper to remove the casing from both ends of the wire to 0.25 inch
(6.3 mm) ± 0.02 inch (0.5 mm). Do not strip more than 0.27 inch (6.8 mm) of
insulation from the wire. Stripping more than the recommended amount of wire
can leave exposed wire from the power and relay connector after installation.
Step 3 Insert the exposed wires for the external alarm device into the two connections
labeled A1, as shown in Figure 4-13.
- November 2004 1
- CONTENTS 5
- 2 Overview 2-1 6
- 3 Installation 3-1 6
- 5 Troubleshooting 5-1 9
- B Connectors and Cables B-1 9
- Contents 10
- 78-14944-03 10
- Duration of Hardware Warranty 14
- Duration of Software Warranty 14
- Audience 17
- Conventions 18
- Varoitus 19
- Attention 19
- Avvertenza 20
- Advarsel 20
- ¡Advertencia! 21
- Varning! 21
- Related Publications 26
- Obtaining Documentation 26
- Cisco.com 27
- Documentation DVD 27
- Ordering Documentation 27
- Documentation Feedback 28
- • 1 877 228-7302 29
- • 1 408 525-6532 29
- Submitting a Service Request 31
- CLI-Based Setup Program 35
- Taking Out What You Need 36
- Connecting to a Power Source 36
- IP Settings 41
- Completing the Setup Program 41
- Step 10 These choices appear: 44
- Overview 45
- Features 46
- Chapter 2 Overview 46
- Front-Panel Description 47
- 3 Power and relay connector 48
- Warning Labels 49
- 10/100/1000 Ports 51
- Power Status LEDs 56
- 10/100 Port Status LEDs 57
- Uplink Port Status LEDs 58
- Alarm Relay LEDs 60
- Rear-Panel Description 61
- Management Options 63
- • SNMP network management 64
- Installation 65
- Class A Warning for Hungary 72
- • One ferrite 74
- 1 Power and relay connector 90
- Connector 96
- Preparing the AC Power Cord 99
- Statement 42 100
- Chapter 3 Installation 101
- Statement 122 108
- 2 DIN rail 111
- 2 DIN rail clip assembly 117
- Statement 1006 121
- Class 1 LED product 129
- Statement 1027 129
- Statement 1051 131
- Statement 1012 131
- Where to Go Next 133
- Installation in a Hazardous 135
- Environment 135
- Preparing for Installation 136
- EMC Regulatory Statements 142
- VCCI Class A Notice for Japan 143
- Class A Warning for Korea 143
- European Zone 2 Certification 144
- Installation Guidelines 145
- Verifying Package Contents 146
- Verifying Switch Operation 148
- 1 Console cable 150
- Grounding the Switch 152
- Wiring the DC Power Source 155
- Power On the Switch 164
- Running POST 164
- Step 2 Disconnect the cables 166
- Troubleshooting 189
- Understanding POST Results 190
- Diagnosing Problems 191
- Technical Specifications 195
- Catalyst 2955S-12 Switches 196
- Connectors and Cables 201
- 10/100 and 10/100 /1000 Ports 202
- 100BASE-FX Ports 203
- 100BASE-LX Ports 203
- Power and Relay Connector 204
- Console Port 205
- 10/100 ports 206
- 10/100 Ports 207
- Cable and Adapter Pinouts 209
- Connecting to a Terminal 210
- Identifying a Crossover Cable 211
- Translated Safety Warnings 213
- Waarschuwing 219
- Switch Relays Warning 223
- “Open Type” Equipment 230
- Grounded Equipment 234
- Console Cable Connection 236
- Overtemperature Warning 239
- Twisted-pair Supply Wires 244
- Port Connection 247
- Installation Instructions 250
- Service Personnel Warning 251
- Stacking the Chassis Warning 253
- Ground Connection Warning 254
- Jewelry Removal Warning 257
- Product Disposal Warning 259
- Class 1 Laser Product 261
- Class 1 LED Product 262
- Laser Radiation 264
- Laser Viewing Warning 266
- Laser Beam Exposure 268
- Grounded Equipment Warning 278
- Qualified Personnel Warning 280
- Restricted Area 281
- Chassis Power Connection 284
- Exposed DC Power Wire Warning 287
- Numerics 289
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