Preliminary Copy Section 1 Introduction & Specifications Introduction This section includes the following overviews of the SEL-3021 Serial Encrypting Transceiver: ➤ Product Overview ➤ Connections, Reset Button, and LED Indications ➤ Software System Requirements ➤ General Safety and Care Information ➤ Specifications Date Code 20041005 Instruction Manual SEL-3021 Transceiver
1.2 Introduction & Specifications Product Overview Preliminary Copy Product Overview The SEL-3021 Serial Encrypting Transceiver is a bump-in-the-wire encryption device designed to add strong cryptographic security to new serial communications links and to provide an easy and effective security solution for existing serial communications networks. It is designed for use on both point-to-point byte oriented communications links and multidrop SCADA networks.
Introduction & Specifications Product Overview Preliminary Copy 1.3 Encrypted Communications Over an Insecure Channel SEL-3021 SCADA Master SEL-3021 Modem Unauthorized Communication Blocked by an SEL-3021 Insecure Channel Modem SCADA RTU Modem Unauthorized Communication Blocked by an SEL-3021 Unauthorized Device or Attacker Figure 1.
1.4 Introduction & Specifications Connections, Reset Button, and LEDPreliminary Indications Copy Connections, Reset Button, and LED Indications The figure below shows typical connections for the SEL-3021. + 125 Vdc 5–24 Vdc Fuse Modem EIA-232 Contact Input Trusted Interface SEL-2030 SEL-2506 Figure 1.3 SEL-421 SEL-311L EIA-232 Untrusted Interface Insecure Network AES Encrypted Wireless 802.11b link from computer to SEL-3021 PC Computer or PDA with 802.
Introduction & Specifications PreliminaryConnections, Copy Reset Button, and LED Indications 1.5 Alarm Output Connection Use the solid-state alarm contact to alert you to problems either with the communications channel or the SEL-3021. See Section 5: Testing and Troubleshooting for more details. To maintain the UL rating of the SEL-3021, connect the alarm output contact as follows: 1. Use an external load to limit current to less than 100 mA through the alarm contact.
1.6 Introduction & Specifications Connections, Reset Button, and LEDPreliminary Indications Copy 0.5 A, 250 V Fast Blow Fuse + SEL-3021 Alarm Output Contact — Wetting Voltage 125 Vdc Do not apply 125 Vdc directly to the SEL-3021 power supply connections Optional Load Resistor SEL-2030 Contact Input Typical SEL contact inputs draw 4 mA of nominal wetting source voltage Figure 1.
Introduction & Specifications PreliminaryConnections, Copy Reset Button, and LED Indications Table 1.2 1.7 DCE (Female DB9) Pin Description 1 Data Carrier Detect (Output) 2 Transmitted Data (Output) 3 Received Data (Input) 4 Data Terminal Ready (Input) 5 Ground 6 Data Set Ready (Output) 7 Request to Send (Input) 8 Clear to Send (Output) 9 Ring Indicator (Output) Reset Button Use the {RESET} button to reset and delete all security related settings.
1.8 Introduction & Specifications Software System Requirements Preliminary Copy Software System Requirements The SEL-3021 comes with configuration and monitoring software, referred to as the SEL-5809 Settings Software. The SEL-5809 Settings Software is the only means to set and monitor the SEL-3021. The software comes in two versions: one version is for a Personal Computer (PC) and one is for a Personal Digital Assistant (PDA) operating system.
Introduction & Specifications Preliminary CopyGeneral Safety and Care Information 1.9 General Safety and Care Information General Safety Notes The SEL-3021 is designed for restricted access locations. Access shall be limited to qualified service personnel. The SEL-3021 should not be installed or operated in a condition not specified in this manual. CAUTION: The SEL-3021 is an intentional radiator.
1.10 Introduction & Specifications Specifications Preliminary Copy Specifications Indicators Green LED: Electromagnetic Compatibility Immunity Conducted RF Immunity: Device Status Solid-State Output 100 mA continuous 250 Vdc or 120 Vac Operational Voltage Max. On Resistance: 50 Ω Min. Off Resistance: 10 MΩ Insulation: 1500 Vdc Wiring size: 14 AWG Max. 26 AWG Min. 0.4 mm Min. Insulation 105° C, 250 V Min.
Preliminary Copy Introduction & Specifications Specifications 1.11 Certifications ISO: Listings: FCC: IC: FIPS: Date Code 20041005 Device is designed and manufactured using ISO 9001 certified quality program. CE Mark UL 61010C-1/CSA C22.2 No. 1010-1-92/ EN 61010-1 15.
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