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ASCII Serial Interface

The DataLink DL2000-ASM is a compact freestanding ASCII serial interface that enables scanning devices to write to PLC integer files via Data Highway Plus. This facilitates ASCII data transfer to any PLC including models without an ASCII port, such as A-B’s ControlLogix. A block of data is temporarily stored in the ASM’s 240-byte buffer until the buffer is filled or an ASCII carriage return is detected in the data. Once the data is terminated, the bytes are transmitted to the PLC in DH+ protocol format.  All bytes are retransmitted in the order they were received minus the carriage return.


Features:

Flexible System Layout: scanners located anywhere on a DH+ network can send ASCII messages to PLCs in other locations
Compact and Lightweight: Small footprint for installation convenience
Easy Configuration: All parameters are menu-driven
High Speed: Serial speeds from 300 baud to 19.2 Kbaud and also 57.6 Kbaud

Specifications:

  
Interfaces 
Channel A: Synchronous; SDLC Transformer-coupled
Channel B: Asynchronous; RS232C/RS422/RS485

Physical Dimensions 
Size: 7.5" D x 5.5" W x 1.5" H
(190mm x 140mmx 38mm)
Weight: 2.2lbs (1kg.)

Power
AC: 110/220 VAC (+/- 25%); 50/60 Hz; 5 Watts
DC: 10 - 35 VDC; 5 Watts

Installation
Freestanding; Metal enclosure

Environment
Operating: +32°F to 122°F (0°C to +50°C)
Storage: -40°F to +185°F (-40°C to +85°C)
Humidity: 5% to 95% non-condensing

Protocols
Channel A: Allen-Bradley Data Highway Plus
Channel B: Allen-Bradley DF1 (ANSI X 3.28); Custom

Configuration
PC program software menu for communications
parameters		 Selection
Jumpers select supply voltage and  
serial interface type

Indicators
1 LED for power-on; 5 LEDs for communications activity

Switches
Reset and Configure/Diagnostics mode pushbuttons

Error Detection
Channel A: CRC
Channel B: BCC or CRC

Communications
Channel A: Synchronous, DH+ at
57.6 Kbaud
Channel B: Asynchronous; 300 baud to
19.2 Kbaud;
High-speed 57.6 Kbaud selection

Hardware
Z180 Processor; 32 Kbyte Flash-PROM;
8 Kbyte RAM; 32 byte EEPROM;
1 DH+ and 2 serial interface connectors
   

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