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PF1616L.pdf Converter
schematic/physicalGENERAL DESCRIPTION and TYPICAL APPLICATIONS:
The ASC24T is a fast Async bi-directional RS232 to RS485 interface converter for 2-wire, half-duplex applications, with an automatic TX enable circuit, that will operate at data rates up to 115.2Kbps. The unit has jumpers for bias, termination, RS232 DTE/DCE selection, and a setting for fast responding RS485 devices. The unit has edge mounted LED indicators, a removable screw terminal connector, and uses an SN75LBC184P limited slew rate transceiver (1/2 unit load) with built-in transient protection.
The ASC24T is designed for office and/or industrial applications (non-isolated), and provides superior characteristics/features normally found only on more expensive units. Can be used for point to point, or multi-drop 2-wire systems.
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PF1616L.pdf Converter
schematic/physical |
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PHYSICAL PROPERTIES and FEATURES:
| RS232: | 3-wire interface to RJ11/12 Connector (TX, RX, Common). |
| RS485: | Removable screw terminal (TX/RX+, TX/RX-, Common). |
| Power: | 2.1mm center positive "Barrel" connector (8-12VDC), linear regulator. |
| LEDs | Power(YEL), TX-RS485(RED), and RX-RS485(GRN). |
| Bias: | 620 Ohm pull-up and pull-down (jumper selectable). |
| Termination: | 120 Ohm (jumper selectable). |
| Special: | Jumper selection for fast responding RS485 devices. |
| Protection: | Up to 400W typical per SN75LBC184P specification. |
SPECIFICATIONS:
| Distance: | RS485 up to 4000 ft. (1250 meters) |
| Operation: | 2-wire half-duplex RS485 Data. |
| Format: | Asynchronous data with any combination of bits, parity, stop. |
| Speed: | Up to 115.2Kbps (slew limited driver). |
| Temperature: | 0-65C (32-150F) ambient. |
| Humidity: | 10-90% non-condensing. |
| Voltage: | 8-12VDC. |
| Power: | Under 1/2 Watt(typical) + external load. |
| Size: | 2.50" X 2.00" X 0.9" (PC Board), with connectors: 2.50" X 2.25". |
| Mounting: | 4-Holes at 2.00" X 1.50" (built-in standoffs for #6 hardware). |
OPTIONS AND ORDERING INFORMATION: (Model ASC24T)
| ASC24T: | $45.00 ea. (Circuit board only) |
| Enclosure: | $8.00 ea. (Small) |
| Cable: | $7.50 ea. (RS232, 7 ft., Specify DB9F-7 or DB25F-7) |
| Supply: | $7.50 ea. (9VDC @ 200/300 mA wall power supply) |
| *ASC24T with all options (DB9F cable): ASC24T-B9FPS @ $68.00 ea. (Qty. 1-9) |
Please call us at: 513-874-4796
| Contact
Information: R.E. Smith, 10330 Chester Road, Cincinnati, Ohio 45215 513-874-4796 Phone, 513-874-1236 Fax., rs485.com |
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