Operating Manual (Good information for all CAS units)
• Code activated switch for RS485 (2-wire, half-duplex) or RS485/RS422 (4-wire, full-duplex) multi-drop networks, using non-addressable RS232 target/remote devices.
• Network multiple RS232 devices over either RS485 (2-wire) or RS485/RS422 (4-wire), at distances up to 4000 ft. and data rates up to 115.2Kbps.
• Software/hardware configuration of "Node address," Data rate, Parity, "Attention character," Unit address, time-out value, and operating modes.
• Think of the CAS24 as an addressable interface converter that can communicate with RS232 devices using the same and/or different protocols/command structures.
GENERAL DESCRIPTION and TYPICAL APPLICATIONS:
The CAS24 "Code activated switch" allows RS232 devices that are normally non-addressable and only usable in point-to-point applications to be added to new or existing RS485 and/or RS422 networks. User programmable settings allow the CAS24 to be used as a versatile tool for constructing networks of almost any size (2-1000+ nodes).
The unit has jumpers for bias, termination, RS232 DTE/DCE selection, mode control, and "external/hardware" unit address (see manual and schematic).The unit has edge mounted LED indicators, a removable screw terminal connector, and SN75LBC184P limited slew rate transceivers (1/2 unit load) with built-in transient protection.
The CAS24 is designed for office and/or industrial applications (non-isolated), and provides superior characteristics/features normally found only on more expensive units. The CAS24 can also be used as a flexible interface converter. A host/remote network can be constructed using only 3 units (One converter and two addressable nodes).
| Download: | ||
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CAS24.pdf | Converter schematic/physical |
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CAS24 Manual.pdf |
Operating Manual (Good information for all CAS units) |
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CAS24.exe | Setup Software for CAS24 Windows 95,98,NT |
Click on this image of the CAS24 for full-size photograph:
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PHYSICAL PROPERTIES and FEATURES:
| RS232: | 3-wire interface to RJ11/12 Connector (TX, RX, Common). |
| RS485: | Removable screw terminal (Common, TX/RX-, TX/RX+, RX-, RX+, Common). |
| Power: | 2.1mm center positive "Barrel" connector (9VDC) and Wago terminals. |
| LEDs | Power(YEL), TX-RS485(RED), and RX-RS485(GRN), and RS232 enabled(GRN). |
| Bias: | 620 Ohm pull-up and pull-down (jumper selectable). |
| Termination: | 120 Ohm (jumper selectable)or 240 Ohm (jumper selectable). |
| Special: | Switching regulator, Windows software for setup. |
| Protection: | Up to 400W typical per SN75LBC184P specification. |
SPECIFICATIONS:
| Distance: | RS485 up to 4000 ft. (1250 meters) |
| Operation: | 2-wire half-duplex RS485or 4-wire RS485/RS422 |
| Format: | Asynchronous 8-data bits, parity optional |
| Speed: | 2400, 4800, 9600, 14.4K, 19.2K, 28.8K, 38.4K, 57.6K, 115.2Kbps |
| Temperarure: | 0-65C (32-150F) ambient. |
| Humidity: | 10-90% non-condensing. |
| Voltage: | 8-35VDC. |
| Power: | Under 3/4 Watt(typical) + external load. |
| Size: | 3.50" X 3.00" X 0.9" (PC Board), with connectors: 3.50" X 3.25" |
| Mounting: | 4-Holes 3.00" X 2.25" (built-in standoffs for #6 hardware) |
OPTIONS AND ORDERING INFORMATION: (Model CAS24)
| CAS24: | $100.00 ea. (Circuit board only) |
| Enclosure: | $10.00 ea. (Medium) |
| Cable: | $7.50 ea. (RS232, 7 ft., Specify DB9F-7 or DB25F-7) |
| Supply: | $8.50 ea. (12VDC @ 200/300 mA wall power supply) |
| * CAS24 with all options (DB9F cable/Enclosure/PS): CAS24-B9FSPS @ $126.00 ea. (Qty. 1-9) |
Please call us at: 513-874-4796
 Contact Information:R.E. Smith 10330 Chester Rd., Cincinnati, Ohio 45215 Phone: 513-874-4796 Fax: 513-874-1236 |