RS-232 Interface Tester with Overvoltage Protection

RS232 Tester, TXD, RXD, CTS, RTS, DTR, DSR, DCD

RS-232 Tester: enlarge image >>

Serial signals all at one glance

The RS-232 Interface Tester (Fig. 1) can display serial RS232 signals (at a SUB-D9 interface). The interface tester is installed at an existing serial connection. Its two jumper blocks allow you to switch through signals individually.
The interface tester offers easy direct switching from 1:1 mode to modem or null modem as well as a loop-back connection which saves additional cables.
Its seven bicolor LEDs indicate whether a line signal is active (high/low, +/-).

On the input side of the RS 232 interface, a multi-pin connector provides easy 1:1 access to all interface pins, allowing you to perform tests (e.g. with a multimeter test set, oscilloscope, etc.) during runtime.
For maximum protection, we have equipped the output side of the RS 232 Interface Tester (sub D connector) with suppressor diodes (signals to GND) and a decoupling capacitor (between the screen and GND). The suppressor diodes provide overvoltage protection, activated at signal levels higher than 18V (Fig. 2).
All these features are compactly integrated on less than 4.2cm X 9.3cm.

Fig. 2: Overvoltage protection

Advantages of the RS232 Interface Tester:

Individual signal configuration (speed selection of 1:1, modem, null modem and loop-back thanks to simple jumper settings)
Visual diagnostic indicators for the DTR, DSR, RXD, RTS, CTS, and DCD signals with clearly arranged bicolor LEDs
Test points for direct access to the input side of RS232 SUB-D9 connector (for connecting devices such as multimeter test sets, oscilloscopes, etc.)
Overvoltage protection through suppressor diodes at every signalling line to ground and decoupling capacitor (activated at output signal power >18V)
Excellent workmanship with high-quality components and professional design
Compact size (small measurements) facilitates testing in locations with difficilt access
No DB25 to DB9 adaptors required
Only one cable required for all tests
Additional test adapters are not required because they have already been integrated.

Numerous integrated functions make accessory components such as adapters, cables, etc. unnecessary.
Compared to most other interface testers our product does not require any DB25 to DB9 adapers which create additional sources of possible error.

Application

Wide range of application areas

Testing and monitoring of serial RS232 interfaces

Overvoltage protection for tested devices

Compact design provides easy access even in difficult locations

Supports frequently changing cable configurations

Research and development

Function testing of serial interfaces

Ideal companion for the service technician

... and more

Specifications

RS-232 Interface-Tester	Specifications
Interfaces	1 x RS232 SUB-D9 jack (full pin configuration) 1 x RS232 SUB-D9 plug (full pin configuration)
Interfaces	9-pin row for measuring instruments
Diagnostics LEDs	TXD, RXD, DTR, DSR, RTS, CTS, DCD, each in 2 colors (gn/rd) for displaying voltage level (+/-)
Power supply	RS232 Interface
Casing	Plastic case
Measurements w/h/d	Approx. 93/20/42 mm
Operating/Storage temperature	5° C to 55° C / -10° C to 70° C
Relative humidity	5 % to 90 %, non-condensing
Overvoltage protection	Overvoltage protection at >18V due to suppressor diodes at each signal line against GND. Screen-lateral overvoltage protection due to capacitor.
Scope of supply	RS-232 Interface Tester 10 jumpers Readme
Purchase order number	0202021
Pricing in EUR plus VAT	49.00
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