Advantech BB-422TTL

Model 422TTL converts RS-422 or EIA-530 signals to 5V TTL at data rates up to 115.2 kbps. Two channels are used to convert RS-422 to TTL and two channels are used to convert TTL to RS-422.

A DB25 male connector is used on the TTL side and a DB25 female connector is used on the RS-422/EIA-530 side. The converter supports RD, TD, RTS, and CTS. Pin 7 is signal ground for both connectors.

The converter supports baud rates up to 115.2 kbps. Open pads are provided for each line. If desired, you can change the pin connectors for any of the 4 channels. When converting a second RS-422 channel, use the corresponding RTS A and RTS B pins (refer to the Quick Start Guide).

The converter inverts the TTL signal. Refer to the specifications table to determine polarity. An external +12 VDC power supply is required (not included).

SPECIFICATIONS

SERIAL TECHNOLOGY
Data Rate	115.2 kbps maximum
RS-422
Connector	DB25 female
Signals (EIA-530 pinout)	TDA(-), TDB(+), RDA(-), RDB(+), RTS A(-), RTS B(+), CTS A(-), CTS B(+)
TTL
Connector	DB25 male
Signals	TD, RD, RTS, CTS
VDC Level	5 V
POLARITY (VOLTS)
TTL Input	V(A) - V(B)
High	Negative
Low	Positive
TTL Output	RS-422 / EIA-530 Input
High	Negative
Low	Positive
POWER
Power Source	External (2.5 mm positive tip)
Input Voltage	12 VDC (<100 mA)
MECHANICAL
Dimensions	5.4 x 5.1 x 1.6 cm (2.1 x 2.02 x 0.62 in
MEANTIME BEFORE FAILURE (MTBF)
MTBF	1539882 hours
MTBF Calc. Method	MIL 217F Parts Count Reliability Prediction
ENVIRONMENTAL
Operating Temperature	0 to +70 °C (+32 to +158 °F)
Storage Temperature	-40 to +85 °C (-40 to +185 °F)
Operating Humidity	0 to 95% non-condensing
APPROVALS / CERTIFICATIONS
	FCC Part 15, CISPR, EN 55022 +AC Class A Emissions
	CE
EN 61000-6-1	Generic Standards for Residential, Commercial, Light-Industrial Environments
EN 61000-4-2	Electro-Static Discharge (ESD)
EN 61000-4-3 +A1 +A2 +IS1	Radiated Field Immunity (RFI)
EN 61000-4-4	Electrical Fast Transients-Burst Immunity (EFT)
EN 61000-4-6	Conducted Immunity