Model 282 Total Interface 
Isolation Module

Reference Manual

0315-0169 Rev. A

Print 08.01.01

Table of Contents

 
1.0 General Description

The Model 282 Total Interface Isolation Module provides for a complete full-duplex electrical isolation between two RS-232 devices (including all asynchronous control signals). This isolation is an important consideration if the systems to be connected use different power sources, have noisy signals, or must operate at different ground potentials.

2.0 Specifications

2.1 Interface

Conforms to EIA RS-232 and CCITT V.24 specifications. Pin 2, Transmit Data; Pin 3, Receive Data; Pin 4, Request to Send; Pin 5, Clear to Send; Pin 6, Data Set Ready; Pin 7, Signal Ground; Pin 8, Data Carrier Detect; Pin 20, Data Terminal Ready; and Pin 22 Ring Indicator.

2.2 Connectors

DTE = DB-25F

DCE = DB-25M

2.3 Isolation

1000V

2.4 Data Rate

0 to 64 kb

2.5 Power

110V AC 60Hz (220V 50Hz optional) (-48V DC optional)

2.6 Size

2.25" W x 6.75" L x 1" H (57mm W x 171 mm L x 25mm H)

2.7 Environment

0 to 50C, 5% to 95% RH (no condensation)

3.0 Operation

The male DB-25 connector is a DCE port and will connect to the DTE device, such as a terminal or PC. The DB-25 female connector is a DTE port and is connected to a DCE device, such as a dial-up modem. The direction of each signal is shown in Figure 1.

 
4.0 Connector Pin Assignment

5.0 Power

 The Model 282 has a built-in isolated DC-to-DC converter. Low voltage AC is supplied by a small wall-mounted transformer. This AC voltage is converted to DC voltage which is used to power the DCE side of the Model 282. The DC voltage is also applied to the isolated DC-to-DC converter, which is also used to power the DTE side of the Model 282.

Alternatively, the Model 282 can be ordered as the Model 282-48 which includes a _48 VDC Converter assembly with the Model 282 housings. The user simply connects the supplied cord to the _48 VDC supply.

6.0 Help

Assistance can be obtained by visiting our Technical Support Center.

Appendix A.
Power Plug Connection

Warranty

TELEBYTE warrants the equipment to be free from defects in material and workmanship, under normal and proper use and in its unmodified condition, for 12 months, starting on the date it is delivered for use. TELEBYTE's sole obligation under this warranty shall be to furnish parts and labor for the repair or replacement of products found by TELEBYTE to be defective in material or workmanship during the warranty period. Warranty repairs will be performed at the point of manufacture. Equipment approved for return for warranty service shall be returned F.O.B. TELEBYTE factory and will be redelivered by TELEBYTE freight prepaid, except for non-continental U.S.A. locations. Non-continental deliveries will be sent COD freight plus import/export charges.

The above warranty is in lieu of all other warranties, expressed or implied, statutory or otherwise, including any implied warranty of merchantability or fitness for a particular purpose. TELEBYTE shall not be liable for any damages sustained by reseller or any other party arising from or relating to any equipment failure, including, but not limited to consequential damages nor shall TELEBYTE have any liability for delays in replacement or repair of equipment.

Out of warranty equipment may be returned to the Greenlawn, NY customer service facility prepaid as described above. Return shipping charges will be billed to the customer. The repaired unit will have a 90-day warranty. In those cases where "NO TROUBLE" is found, a reduced charge will be billed to cover handling, testing and packaging.

Whether in or out of warranty, a Return Material Authorization (RMA) number is necessary. Assistance can be obtained by visiting our Technical Support Center.

Document No. 0315-0169/Rev. A