BBG: BBG-2000

BBG-2000
Universal Conversion Engine

Introduction	NMEA-0183 Compatible 90Vl-l or 11.8Vl-l Synchro-to-Digital Conversion 6.8V Resolver-to-Digital Conversion 6 and 12 degree step RS-232, RS-422, RS-423, RS-485, and MIL-STD-188C On-board micro-controller The Universal Conversion Engine provides data format conversion of digital, analog, serial, step, synchro, and resolver signals. These 4 inch x 4 inch modules are factory configurable to customer requirements for easy field installation. Applications include data acquisition of ownship heading, speed, pitch and roll; wind speed and direction monitoring; rudder angle indicator; antenna azimuth positioning; and many others.
	The Universal Conversion Engine interfaces to NEMA-0183 message formats using RS-232, RS-422, RS-423, RS-485, or MIL-STD-188C protocols. This information is then converted to/from analog, step, digital, or synchro formats.
	An optional LCD display provides visual monitoring of information and functions as a remote repeater.
	Synchro inputs/outputs: 90V and 11.8V, 0 - 20000 Hertz Resolvers inputs/outputs: 6.8V, 0 - 20000 Hertz Accuracy to +/- 2 arc minutes
	Serial message inputs/outputs: NMEA-0183 Serial protocol inputs/outputs: RS-232/422/423/485 or MIL-188C Step inputs/outputs: 6 Step/degree, 12 Step/degree Digital input/outputs: 16 bit TTL or 70Vdc Analog input/output: 0/+5, -5/+5, -10/+10 volts

BBG-2000 Specifications
Power Input	Volts MiliAmps	5 500
Operating Temperature Storage Temperature	C° C°	0 to +50 -65 to +150
Physical Characteristics	in. cm.	4.0 x 4.0 x 1.2 10.2 x 10.2 x 3.0

BBG-2000 Overview	The BBG-2000 or Universal Conversion Engine (UCE) is a stand-alone module which interfaces to several types of analog and digital inputs outputs (I/O). An onboard micro-controller reads the input and can provide scaling or other manipulation of the input information. The micro-controller then writes the information to the output. The card can support any of its interfaces as an input or output of the card.. An optional LCD display enables display of raw or converted data.
	During power up or reset, an onboard micro-controller reads the configuration switch that is used to select baud rate of the serial interface. The switch can also be used to select other features of the card. One switch might switch the data rate from a 1 to 10 Hertz output.
	Example uses: radar systems (antenna azimuth), navigation systems gyrocompass, speedlog, course, pitch, and roll), industrial (position, velocity), and meteorological instruments(wind).

Serial
Format

Serial data interfaces use the standard National Marine Electronics Association (NMEA) message formats NMEA-0183 as shown below. This I/O is available in RS-232, RS-422, RS-423, RS-485, or MIL-STD-188C protocols. Standard output update rate is once per second. Custom serial data formats and frequencies are available upon request.

Serial baud rate selection and checksum checking is determined from the configuration switches at power up or reset. Selectable baud rates include:

1200, 2400, 4800, 9600, and 19,200 bits per second.

The default baud rate is 9600 and 8 bits, no parity, one stop bit (9600, 8, N, 1). Checksum validation is controlled by bit 2 of the configuration switch. Table 3 defines the switch position for the available baud rates and checksum validation.

BBG-2000 Baud Rate Selection and CheckSum Validation
Configuration Switch S1	Baud Rate
XX3	1200
XX4	2400
XX5	4800
XX6	9600
XX7	19200
1 = off, 0 = on, X = Don't Care

NMEA-0183
Format

The UCE can be factory programmed for any NMEA-0183 data format. Default data format is following proprietary NMEA-0183 message:

$PTBBG,XXX.XX,A*CSCRLF

$ - Start of message (ASCII character 24 hex)
PT - Proprietary message
BBG - BBG Incorporated
XXX.XX - Angular information (ie. 45.01 degrees)
A - Validity ( A = valid, V = Invalid )
* - Checksum marker (ASCII character 24 hex)
CS - checksum (8 bit XOR of characters between the $ and * the checksum is inaccordance with NMEA-0183. The checksum is the converted to its ASCII value and represented in hexadecimal notation.
CR - Carriage return (ASCII 0D hex)
LF - Line feed (ASCII 0A hex)

Other standard formats include the HDT message, from the NMEA-0183 specification, with selectable update rates of 1 Hertz or 10 Hertz.

Synchro/Resolver
Interfaces

Synchro inputs are jumper selectable for synchro or resolver signals. The voltage can be configured by a simple chip and resistor replacement. Synchro and resolver inputs are fused and are transient protected. Standard Synchro input voltages are 90Vrms, 25Vrms, 11.8Vrms and custom inputs voltages available upon request. The required voltage for reference and line-to-line voltages must be specified at time of order. We have knowledgeable engineers on staff who can help in the determination of the required voltages.

Synchro or resolver outputs can be factory configured for any required voltage and frequency. The voltages required must be specified at time of order or quote. The synchro or resolver outputs can be powered from the reference or can be operated from external +/- 15Vdc power supplies.

Analog Interfaces	The analog inputs are factory configurable for full scale ranges of -10V to +10V. Custom ranges are available upon request so please specify the desired voltage range when ordering.
	The analog outputs are factory configurable for full scale ranges of -10V to +10V. Custom ranges are available upon request so please specify the desired voltage range when ordering.

Connector List
for BBG-2000

I/O Connector type: 50 pin male header
Connector mate: 50 pin female header

Pin No.	Signal	Pin No.	Signal
1	GND (Analog)	26	BCD12 (INPUT/OUTPUT)
2	RXD232 (INPUT)	27	BCD13 (INPUT/OUTPUT)
3	TXD232 (OUTPUT)	28	BCD14 (INPUT/OUTPUT)
4	RXC232 (INPUT)	29	BCD15 (INPUT/OUTPUT)
5	TXC232 (OUTPUT)	30	BCDH (OUTPUT)
6	RXD422- (INPUT)	31	BCDV (OUTPUT)
7	RXD422+ (INPUT)	32	+12V FUSED
8	TXD422- (OUTPUT)	33	WR
9	TXD422+ (OUTPUT)	34	+5V FUSED *
10	RXC422- (INPUT)	35	+15V
11	RXC422+ (INPUT)	36	GND
12	TXC422- (OUTPUT)	37	-15V
13	TXC422+ (OUTPUT)	38	GND
14	BCD0 (INPUT/OUTPUT)	39	S4_2/+COS_2 (OUTPUT)
15	BCD1 (INPUT/OUTPUT)	40	S3_2/-SIN_2 (OUTPUT)
16	BCD2 (INPUT/OUTPUT)	41	S2_2/-COS_2 (OUTPUT)
17	BCD3 (INPUT/OUTPUT)	42	S1_2/+SIN_2 (OUTPUT)
18	BCD4 (INPUT/OUTPUT)	43	RH2 FUSED (INPUT)
19	BCD5 (INPUT/OUTPUT)	44	RL2 (INPUT)
20	BCD6 (INPUT/OUTPUT)	45	S4_1/+COS_1 (INPUT)
21	BCD7 (INPUT/OUTPUT)	46	S3_1/-SIN_1 (INPUT)
22	BCD8 (INPUT/OUTPUT)	47	S2_1/-COS_1 (INPUT)
23	BCD9 (INPUT/OUTPUT)	48	S1_1/+SIN_1 (INPUT)
24	BCD10 (INPUT/OUTPUT)	49	RH1 FUSED (INPUT)
25	BCD11 (INPUT/OUTPUT)	50	RL1 (INPUT)

* NOTE: +5v is an output if using internal AC power supply and an input if using an external DC power supply