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RCS20 M:N Redundancy Switch Revision 15
Electrical Interfaces MN-RCS20 and CD-RCS20
5–22
Pin No.
Signal Name
Signal
Direction
59 IDR ESC Transmit 8 Kbps Output Data B ESCTXD-B Input
60 IDR ESC Receive 8 Kbps Clock Output B ESCRXC-B Output
61 IDR ESC Receive 8 Kbps Data Output B ESCRXD-B Output
62 IDR ESC Backward Alarm Out 4 Normally Open ESCBWO 4NO ---
63 IBS Transmit Octet Input B TXO-B Input
64 Synchronous Data Data Mode Out B SYNC DM-B Output
65 Synchronous Data Clear to Send B SYNC CS-B Input
66 IBS Receive Octet Output B RXO-B Output
67 Synchronous Data Request to Send B SYNC RS-B Input
68 Synchronous Data Receiver Ready B SYNC RR-B Output
5.3.2.2 J9 | MODEM 9 | BACK UP 2 68-Pin High Density Min DSUB Connector
J9 | MODEM 9 | BACK UP 2 connects to Backup Modem 2 in a 2:N configuration, or to the prime modem
9 in a 1:9 configuration. See section 5.3.2.1for pinout table.
5.3.2.3 J10 | BACK UP 1 68-Pin High Density Min DSUB Connector
J10 | BACK UP 1 always connects to backup modem 1 since there is always at least one backup modem
in a redundancy system. See section 5.3.2.1for pinout table.
5.3.2.4 J31 | RCU-20 15-pin High-Density DSUB Connector
J31 | RCU-20 connects the DDS20 to the RCU20 providing power, ground, and serial control.
Pin No.
Signal Name
Signal
Direction
1 Serial Control Clock DDS_LCLK IN
2 Relay +6 Volts VCC_RELAY IN
3 Serial Control Data 2 DDS_LDAT2 Bidirectional
4 Ground GND ---
5 Ground GND ---
6 Logic +5 Volts VCC IN
7 Relay +6 Volts VCC_RELAY IN
8 Relay +6 Volts VCC_RELAY IN
9 Ground GND ---
10 Ground GND ---
11 Relay +6 Volts VCC_RELAY IN
12 Serial Control Data 1 DDS_LDAT1 Bidirectional
13 Ground GND ---
14 Serial Control Data 3 DDS_LDAT3 Bidirectional
15 DDS20 Interrupt INT OUT
- M:N Redundancy Switch 1
- Blank Page 4
- Table of Contents 5
- Table of Contents - ii 6
- Table of Contents - iii 7
- Table of Contents - iv 8
- FIGURES 9
- Table of Contents - vi 10
- PREFACE 11
- Preface - ii 12
- Electrical Safety 13
- Related Documents 13
- Comtech EF Data Headquarters 13
- Warranty Policy 14
- Limitations of Warranty 14
- Exclusive Remedies 14
- Chapter 1. Introduction 15
- 1.3.2.1 Universal DDS20 18
- 1.3.3.1 70/140 IFS20 22
- Chapter 2. Installation 25
- 2.2.1 Test Data Sheet 26
- 2.3 Removal and Assembly 26
- 2.4 Installation Planning 26
- 2.4.1 Rack Information 26
- 2.4.3 Electrical 28
- 2.4.3.1 Grounding 28
- 2.4.3.2 Battery 29
- 2.4.3.3 Fuses 29
- 2.5 Connecting the RCS20 29
- 2.8 Storage 30
- 3.1 Overview 31
- 3.2 RCU20 Major Assemblies 31
- 3.2.2 Front Panel 31
- Chapter 4. User Interfaces 35
- 4.2.1 Modem Control Keys 36
- 4.2.1.1 MODEM MOD CONFIG 36
- 4.2.1.2 MODEM DEMOD CONFIG 36
- 4.2.1.3 MODEM INTFC CONFIG 36
- 4.2.5 Switch Status LEDs 38
- 4.2.6 Numeric Keypad 38
- 4.2.7 Soft Keys (S1 - S4) 38
- 4.3 Front Panel Screens 41
- 4.3.1.2 MODEM ADDRESSES 42
- Key Label Function 48
- Numeric Keypad 48
- 4.3.1.19 MOD FAULT DELAY 58
- 4.3.1.20 DEMOD FAULT DELAY 59
- 4.3.1.21 DEMOD AQU DELAY 60
- 4.3.2.13 SET DATE 75
- 4.3.2.14 SET TIME 76
- 4.3.2.22 CnC SWITCHING 82
- 4.3.3.3 EVENTS 89
- 4.3.3.4 NEXT EVENTS SCREEN 90
- 4.3.4 TEST Menu Tree 93
- 4.3.4.1 SWITCH SYSTEM TESTS 93
- 4.3.4.4 LAMP TEST 96
- 4.3.4.6 REMOTE PORT TEST 97
- 4.4 Remote Interface 97
- 4.5 Terminal Port Control 98
- 4.5.1 Terminal Interface 98
- 5.1 Overview 101
- 5.2.2 Chassis Ground 102
- 5.2.3 Expansion Slots 103
- 5.2.3.2.1 J1 106
- 5.2.3.2.2 J2 106
- 5.2.3.2.3 J3 107
- 5.2.3.2.5 J2 108
- 5.2.3.2.6 J3 108
- 5.2.3.2.4 J1 108
- Female Connectors 120
- G.703B DDO-B SYNC ST-B 121
- 5.4.2.4 J21 124
- BLANK PAGE 134
- Chapter 6. Maintenance and 135
- Troubleshooting 135
- 6.3 Active Major Alarms 136
- 6.4 Active Minor Alarms 137
- 7.1 General Specifications 139
- 7.2 IFS20 (70/140 MHz) 139
- 7.3 IFS20 (L-Band) 140
- 7.4 Terrestrial Interfaces 140
- 7.5 Options 141
- 7.6 Power and Environmental 141
- 7.8 Complementary Products 142
- A.1.1 Protocol Structure 143
- A.1.2 Protocol Wrapper 144
- A.1.5 Collision Avoidance 148
- A.1.8 RLLP Summary 152
- Configuration 168
- Appendix B. System Cabling 179
- B.2 RCS20 Interconnects 180
- Setup and Configuration 199
- 480 • 333 • 2200 PHONE 202
- • 333 • 2161 FAX 202
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