Async RS232 to RS422/485 Interface Converter DB9 Terminal Block
Model: IC821A
- Transmit data up to 115 kbps or at distances up to 4000 ft.
- Operates in point to point or multipoint applications
- Operates 2-wire half-duplex or 4-wire half- or full-duplex.
- async (data leads) only.
- Up to 32 RS485 devices can be attached to create a large multi-drop network
The BLACK BOX® Universal RS-232 to RS-422/485 Converter with Opto-Isolation isolates and converts RS-232 signals into RS-422/RS-485 signals and vice versa. Unlike other converters, external software is not required to control data flow. The RS-232 input is wired for DCE through a DB9 female connector, and RS-422/RS-485 signals are interfaced through a removable terminal block. To supply external power to the terminal block, you need our 120-VAC/12-VDC Wallmount Power Supply (PS1003).
For RS-232, the connection requires RD, TD, and Signal Ground.
In RS-422 mode, the driver is always enabled for full-duplex communications. A twisted pair is required for transmit, and a twisted pair is also required to receive. A ground reference wire is also needed. Switch settings are Switch 1: RS-422; Switch 2: Echo On; Switches 3 and 4: 4 Wire.
In both RS-485 modes, the RS-485 driver is automatically enabled during each space state by the presence of an RS-232 signal. When the RS-232 data is in a mark or idle state, the RS-485 driver is disabled and the RS-485 data lines are held in a mark state by the bias provided by a 4.7-ohm resistor; the value of this resistor may need to be changed, depending on the termination you use.
To connect to several RS-485 devices with minimal wire, select the unit's 2-wire, half-duplex RS-485 mode. When data is requested, the addressed device transmits and then reverts back to receive status. Switch settings for this mode are Switch 1: RS-485; Switch 2: Echo Off; Switches 3 and 4: 2 Wire.
For 4-wire master/slave circuits, select the unit's 4-wire, full-duplex RS-485 mode. In this mode, addressed devices can receive data while transmitting data from a previous request. When used as a master in a single-master system, Switch 1 may be selected because the unit is the only transmitter in the system. When used as an RS-485 slave, the RS-232 device must provide addressability. Biasing in a master/slave system is provided by the end-of-line slave. Switch settings for this mode are Switch 1: RS-485; Switch 2: Echo On; Switches 3 and 4: 4 Wire.
- Transmit data up to 115 kbps or at distances up to 4000 ft.
- Operates in point to point or multipoint applications
- Operates 2-wire half-duplex or 4-wire half- or full-duplex.
- async (data leads) only.
- Up to 32 RS485 devices can be attached to create a large multi-drop network
- The RS485 driver is automatically enabled during each spacing state on the RS232 side.
- Converter Type - Other
- ROHS Compliant - Yes
- Warranty - Yes
- Spec Sheet available - Yes
- Operating Temperature (Maximum): 70 F
- Operating Temperature (Minimum): 32 F
- Input Signal Types: RS-232
- Output (Converted) Signal Type: RS-422/RS-485
- AC Voltage: 120 Volts
- DC Voltage: 48 Volts
- Regulatory Compliance: WEEE, TAA
- Warranty (Length/Type): 1 Year
- Data Rate (Maximum): 115.2 kbps
- Isolation: 2000 VAC
- Connectors:
- RS-232: (1) DB9 F
- RS-422/RS-485: (1) removable terminal block
- Power: Current Draw: 28 mA at 12 VDC (typical)
- Shipping Height (with packaging): 2.25 in
- Shipping Weight: 0.41 lbs
- Shipping Width (with packaging): 6.25 in
- Shipping Depth (with packaging): 9.75 in
- Product Weight: 0.41 lbs
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Avidex Industries, LLC
8509 154th Ave NE
Suite 100
Redmond, WA 98052
USA
(425)643-0330
www.avidex.com