MPN IC821A
Item no. W126132554
EAN/UPC 5715063124338
Stock level
Quick Facts
- Convert RS-232 to 4-wire RS-422 or to 2- or 4-wire RS-485.
- Features 2000-VAC isolation.
- RoHS compliant.
- Selectable RS-422 operation.
- Select RS-485 for 2-wire half-duplex or 4-wire full-duplex.
- Auto RS-485 driver control.
Further Details
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...
Convert RS-232 to 4-wire RS-422 or to 2- or 4-wire RS-485.
Enable you to select RS-485 2-wire half-duplex or RS-485 4-wire full-duplex operation.
Selectable RS-422 operation with transmit and receive always enabled.
Automatic RS-485 driver control, so it works without any special programming for handshaking signals.
No external power is required if two RS-232 output handshake lines are available.
Universal RS-232 to RS-422/485 Converter
Bidirectional data conversion.
Enables transmitter from RS-232 TD signal and receiver when not transmitting.
Set operating mode with four switches.
Converts using either port power or power from an external 12VDC power supply (not included).
0.18 kg
0.028 A
10 - 48 V
0.18 kg
24.765 cm
5.715 cm
15.875 cm
RS-232
RS-422/485
2
1 Year(s)
23 x 99 x 43 mm
Quick Facts
- Convert RS-232 to 4-wire RS-422 or to 2- or 4-wire RS-485.
- Features 2000-VAC isolation.
- RoHS compliant.
- Selectable RS-422 operation.
- Select RS-485 for 2-wire half-duplex or 4-wire full-duplex.
- Auto RS-485 driver control.
Further Details
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 for 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.
NOTE: Power Supply (PS1003) is not included, but is required.
*The product data above is provided by Icecat. EET cannot be held responsible for errors in relation to this.