Advantech BB-232OTTL

Model 232OTTL converts RS-232 signals to 0-5 VDC TTL ("Transistor-Transistor Logic") levels. The 232OTTL provides 1500V optical isolation. Two channels are used to convert from RS-232 to TTL signals and two channels are used to convert from TTL signals to RS-232. These converters support RD, TD, RTS, and CTS. The RS-232 side is a DB25P male connector (DCE). The TTL side is a DB25S female connector. The 232OTTL supports up to 38.4K baud. It is important that only TTL logic (0 to 5V) is used for the TTL side of the converter. The maximum sinking current for one TTL output is 8 mA. The maximum source current for one TTL is 0.8 mA. Signal levels are inverted by the converter in its standard configuration as shown in Table 1. Model 232OTTL has the option for non-inverted outputs - see Table 2, "Operations Requiring Modification" if non-inverted outputs are desired. Port power is derived from the outputs of the host RS-232 port. TD, RTS, and DTR lines may be used to port power the RS-232 side. A minimum of two of these lines in either high or low states is required for proper operation. To externally power the RS-232 side, connect the positive lead of the 12VDC power supply to pin 25 and the GND lead to pin 12 of the DB25 female connector.Model 232OTTL requires both port power on the RS-232 side, and an external 12VDC power supply connected either through 2.5mm jack or pins 12 (GND) and 25 ( 12VDC) on the TTL side.

SPECIFICATIONS

SERIAL TECHNOLOGY
Data Rate	38.4 kbps maximum
RS-232
Connector	DB25 female (DCE)
Signals	TD, RD, RTS, CTS, GND
TTL
Connector	232OTTL: DB25 male
Signals	2 Input/2 Output Channels, GND
Logic	CMOS
VDC Level	5V
ISOLATION
Isolation	2,000 V optical
POWER
Source	RS-232: port-powered from RS-232 handshake lines TTL: requires +12 VDC external power supply
Input Voltage	12 VDC (<100 mA)
MECHANICAL
Dimensions	7.8 x 5.4 x 2.1 cm (3.1 x 2.1 x 0.8 in)
Enclosure	Plastic, ABS, Inline
Weight	0.011 lbs (49.9 g)
MEANTIME BEFORE FAILURE (MTBF)
MTBF	2107197 hours
MTBF Calc. Method	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 - 232TTL
	FCC Part 15, CISPR, EN 55022 + AC Class A Emissions
	CE
	EN 61000-6-1 Generic Standards for Residential, Commercial and Light-Industrial Environments
	EN 61000-4-2 Electro-Static Discharge (ESD)
	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