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RS485 to 5V TTL Converter

Model TTL-485-5P + External 5V Power Supply

Category: RS232 / RS485 to TTL Converters

DESCRIPTION

The TTL-485-5P is a bi-directional 5V externally powered RS485 to 5V TTL converter which converts a half-duplex RS485 port to a 5V TTL signal. A built-in data direction auto-turnaround feature automatically enables the TTL driver when data is present from the RS-485 port, eliminating the need for software drivers, and making the device fully plug-and-play. The TTL-485-5P has a DB9 male connector on the RS485 port, and DB9 male connector on the TTL port. Two separate terminal blocks are included with the product - one for the RS485 port and the other for the TTL port. The terminal blocks plugs into the RS485 and TTL ports, providing screw-lug wire terminations for the ports. The unit is enclosed in a rugged ABS housing, and is externally powered. This converter operates from 300 to 115,200 bps.

TTL VOLTAGE LEVELS

TTL INPUT TTL OUTPUT
HIGH (>2.0) HIGH (5.0V)
LOW (<0.8)< /td> LOW (0.0V)

FEATURES

  • Plug-and-Play (Hot-pluggable)
  • Externally Powered - 5V External Power Needed
  • Included UL Listed 5V/120VAC/220VAC Power Adapter
  • Data Direction Auto-turnaround - No Flow Control is Necessary
  • Built-in 600W Surge and 15KV Static Protection
  • 5 Year Manufacturer's Warranty
  • RoHS 3, CE, FCC and REACH Certified
RS485 to 5V TTL converter
RS485 to 5V TTL converter plus blocks
PRICE: $29.95

IN STOCK

30 Day Money Back Guarantee!

5 Year Replacement Warranty!

ISO 9001:2015 QUALITY MANAGEMENT

ISO-9001:2015

Our internationally recognized ISO 9001:2015 Quality Management System (Cert. No. 743003912) with a scope of “Design, Sales, Distribution of Data Communication and IT Support Services“ was recognized and certified by TÜV Rheinland of North America known for its very demanding and stringent requirements. For more details see our Quality Policy.

COMMUNICATION
STANDARDS: RS-485 Standard
BAUD RATES: From 300 bps To 115,200 bps
CONNECTOR TYPES: RS-485 Side: DB9 Male or 5-way Terminal Block and TTL Side: either DB9 Male or 5-way Terminal Block
DISTANCE: RS-485 Side: 4000 ft (1.2km) and TTL Side: up to 10 ft (3m)
ELECTRICAL
POWER SOURCE: Included 5VDC/100VAC-240VAC Power Adapter
CURRENT CONSUMPTION: Less Than 10 mA
STATIC PROTECTION: 15KV Electric Static Discharge (ESD) Protection
SURGE PROTECTION: 600W Surge Protection
CONVERSION IC: Exar SP485EEN - For information from Exar; follow this link.
MECHANICAL
HOUSING: Rugged ABS
WEIGHT: With Terminal Block: 1.7oz (50 grams)
Without Terminal Block: 0.8oz (24 grams)
DIMENSIONS: With Terminal Blocks: 3.98 X 1.35 X 0.70 in (99.8 X 34.1 X 17.8 mm)
Without Terminal Blocks: 2.47 X 1.33 X 0.70 in (62.8 X 33.8 X 17.8 mm)
ENVIRONMENTAL
OPERATING TEMP.: -4ºF to 140ºF (-20ºC to 60ºC)
STORAGE TEMP.: -40ºF to 185ºF (-40ºC to 85ºC)
OPERATING HUMIDITY: 5% To 95% - No Condensation
QUALITY
PRODUCT SAFETY: CE, FCC and RoHS Conformance Certified
QUALITY MANAGEMENT: Manufactured and Distributed to ISO 9001:2015 QMS
RELIABILITY: Low Failure Rate - 99+% Reliability Since Inception
WARRANTY: 5 Year Replacement Warranty

RS485 Side DB9 Male or Terminal Block

Signal GND +5V NC D+ D-
Pin # 1 2 3 4 5
Function GND +5V NC D+ D-

5V TTL Side DB9 Male or Terminal Block

Signal GND NC TTL OUT TTL IN GND
Pin # 1 2 3 4 5
Function GND NC TTL OUT TTL IN GND

Using one TTL-485-5P unit:

  1. Check that all connections comply with the connection diagrams.
  2. Perform a loop back test on one unit:
    1. Connect the IN to OUT on the TTL port.
    2. Connect the RS-485 port to the PC RS-485 port.
    3. Running a hyper terminal program on the PC, send ASCII characters to the TTL-485-5P converter from one PC port, and check that the characters are received at the same PC port. This tests that the transmit and receive functions of the TTL-485-5P unit is working properly.

Using two TTL-485-5P units:

  1. Check that all connections comply with the connection diagrams.
  2. Perform a loop back test on two units:
    1. Connect the two TTL ports. Connect TTL IN to TTL OUT and TTL OUT to TTL IN.
    2. Connect the two RS-485 ports to two PC RS-485 ports.
    3. Running hyper terminal programs on both PCs, send ASCII characters to the TTL-485-5P converter from one PC port, and check that the characters are received at the 2nd PC port. Repeat the test in the opposite direction. This tests that the transmit and receive functions of both TTL-485-5P units are working properly.

Download FREE FULL VERSION AccessPort Advanced Serial Monitor, Simulation and Data Analysis Software Tool. This software tool is great for testing converters. Supports Windows 98/XP/VISTA/WIN 7/WIN 8/WIN 10.   DOWNLOAD SOFTWARE AND USER MANUAL

Below are some of the RS485 to TTL converter applications.

FIGURE 1: Extending TTL Distance

FIGURE 2: Master/slave multiple drop configuration

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