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Code: IC620A
SuperSwitch 8
10/100
MARCH 1998
IC620A-F IC623A-M
IC620A-M IC624A-F
IC623A-F IC624A-M
RS-232/485 Converter
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FCC AND IC STATEMENTS FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communi- cation. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC
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RS-232/485 CONVERTER NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas. 5. El a
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NOM STATEMENT 10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor. 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato. 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuen
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RS-232/485 CONVERTER TRADEMARKS Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. 4
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TABLE OF CONTENTS CONTENTS 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .6 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .8 2.1 Description . . . . . . . . . . . . . . . . . . . . . . .8 2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . .9 3. Configuration . . . . . . . . . . . . . . . . . . . . . . . .11 3.1 Accessing the DIP Switches . . . . . . . . .11 3.1.1 DIP Switch S1 Settings . . . . . . . .16 3.1.2 DIP Switch S2 Settings . . . .
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RS-232/485 CONVERTER 1. Specifications Transmission Format — Asynchronous Data Rate — Up to 115,200 bps Range — Up to 9 miles (14.4 km) Serial Interface — EIA/TIA-574 standard RS-232 DCE Connectors — IC620A-F: (1) DB9 female, (1) 5-position terminal block, IC620A-M: (1) DB9 male, (1) 5-position terminal block; IC623A-F: (1) DB9 female, (1) RJ-11 female, IC623A-M: (1) DB9 male, (1) RJ-11 female; IC624A-F: (1) DB9 female, (1) RJ-45 female, IC624A-M: (1) DB9 male, (1) RJ-45 female Transmit Li
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CHAPTER 1: Specifications CTS turns ON after the terminal raises RTS RTS/CTS Delay — 8 msec or “no delay” Carrier — The carrier is switch-selected either continuous operation or switched operation, controlled by RTS Surge Protection — 600 W power dissipation at 1 ms Temperature — 32 to 122°F (0 to 50°C) Humidity — 5 to 95%, noncondensing Maximum Altitude — 10,000 ft. (304.8 m) MTBF — 209,384 hours Power — Draws operating power from EIA/TIA-574 data and control signals; no AC power or batteries r
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RS-232/485 CONVERTER 2. Introduction 2.1 Description The RS-232/485 Converter (IC620A) is an ultra- miniature interface converter. Requiring no AC power or batteries for operation, the Converter supports asynchronous communication up to 115.2 Kbps over one or two unconditioned twisted pairs. Distances up to 15 miles (24 km) are attainable at lower data rates (1.2 Kbps, 19 AWG twisted pair). The Converter can handle up to 31 terminal drops in a multipoint polling environment. For RS-485 appl
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CHAPTER 2: Introduction Six models are available: • DB9F/Term (IC620A-F) • DB9M/Term (IC620A-M) • DB9F/RJ-11 (IC623A-F) • DB9M/RJ-11 (IC623A-M) • DB9F/RJ-45 (IC624A-F) • DB9F/RJ-45 (IC624A-M) 2.2 Features • Operates asynchronously, point-to-point or multipoint, over 2 or 4 wires. • Up to 31 multipoint device drops in a polling environment. • Data rates up to 115.2 Kbps. • Passes transmit and receive data, one control signal in each direction. • No AC power or batteries required. • Variable high
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RS-232/485 CONVERTER • Twisted-pair connection via strain relief, RJ-11, or RJ-45. • Silicon Avalanche Diode surge protection. • A Transmitter On signal received at the RS-485 RCV connection will cause DCD output at the RS-232 connector to assert High. 10
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CHAPTER 3: Configuration 3. Configuration The Converter is configured using two internal 4-position DIP switches. This section shows how to access the DIP switches, provides an overview of the factory-default settings, and describes all possible configuration options. For instructions on how to configure the Converter for specific applications, see Section 3.2. 3.1 Accessing the DIP Switches The Converter has a main PC board and a daughter- board. DIP switch S1 is located on the underside of t
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RS-232/485 CONVERTER Switch S1 Figure 3-1. Underside of the Converter’s main PC board, showing the location of DIP switch S1. 12
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CHAPTER 3: Configuration Switch S2 RCV XMT ++ - G - Figure 3-2. Top of the Converter’s daughterboard, showing the location of DIP switch S2. 13
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RS-232/485 CONVERTER To access the Converter’s internal PC boards, insert a small flat-blade screwdriver between the connector and the lip of the case and twist gently as shown in Figure 3-3. Figure 3-3. Opening the Converter’s plastic case with a small screwdriver. 14
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CHAPTER 3: Configuration Both DIP switch S1 and S2 are marked with individual switch numbers 1 through 4. Use these numbers, and the “ON” designation to orient the switch properly (see Figure 3-4). Use a small screwdriver or similar instrument to set each individual switch. ON ON 1 2 3 4 OFF Figure 3-4. Close-up of DIP switches S1 and S2, showing ON/OFF orientation. 15
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RS-232/485 CONVERTER 3.1.1 DIP SWITCH S1 SETTINGS DIP switch S1 is used to configure receive impedance (termination), 2-wire/4-wire operation and “echo” enable/disable. Table 3-1 shows the factory-default settings for switch S1. Following Table 3-1 is a detailed description of each switch. Table 3-1. Switch S1 Summary Table (factory defaults in bold) Position Function OFF Position ON Position S1-1 RCV impedance (termination) 16 K ohms, typ. 120 ohms S1-2* 2-wire/4-wire 4-wire 2-wire S1-3* 2-wire
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CHAPTER 3: Configuration S1-1: Receive Impedance (Termination) The setting for switch S1-1 selects the impedance of the input receiver. You may select either a “low” impedance of 120 ohms or a “high” impedance of 16 K ohms. By selecting the proper impedance for each drop, you can have up to 50 receivers in one application. S1-1 Setting On Low (120 ohms) Off High (16 K ohms typical) S1-2 and S1-3: 2-wire/4-wire Modes Switches S1-2 and S1-3 are set together to determine whether the Converter is i
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RS-232/485 CONVERTER S1-4: Echo Mode The setting for switch S1-4 determines whether the Converter echoes data back to the transmitting device (half-duplex mode only). S1-4 Setting On Echo On Off Echo Off 3.1.2 DIP SWITCH S2 SETTINGS DIP switch S2 is used to configure carrier control, RTS/CTS delay, and communication protocol. Table 3-2 shows the factory-default settings for switch S2. Following Table 3-2 is a detailed description of each individual switch. Table 3-2. Switch S2 Summary Table (fa
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CHAPTER 3: Configuration S2-1: Carrier Control Method The setting for S2-1 determines whether the carrier is “Constantly On” or “Controlled by RTS.” This allows for operation in switched carrier, multipoint, and/or hardware handshaking applications. S2-1 Setting On Controlled by RTS Off Constantly On NOTE When in Controlled mode, RTS must go negative to turn off the Transmitter and enable the Receiver. S2-2: RTS/CTS Delay The setting for switch S2-2 determines the amount of delay between the tim
