BBG: BBG-SSBA

Introduction

The BBG-SSBA is a 6U VME FORMAT pc card which inputs a serial data message containning a speed or angular position. This information is processed by the onboard microcontroller and output in a synchro or resolver format. The BBG-SSBA is available in 25VA and 125VA output power configurations. An onboard microcontroller configures the card from power up or reset and provides all signals and control to read the serial information and output the synchro/resolver information. Serial data formats, power outputs, synchro and resolver voltages and frequencies are factory configurable to user requirements.

Synchro information is passed over the serial data bus in a binary angle measurement format (BAM) as shown in Table 2. The BBG-SSBA accepts serial data in RS-232, RS-422, RS-423, RS-485, or MIL-STD-188C protocols. Serial baud rates are switch selectable at: 1200, 2400, 4800, 9600, and 19,200 bits per second. Default data output is 9600, 8 bits, no parity, and one stop bit (9600, 8, N, 1). Table 3 defines the switch position for the available baud rates. Custom serial data formats and frequencies are available upon request.

BBG-SSBA Specifications
Power Supply	Volts MiliAmps Volts Amps Volt Amps	5 500 15 30 (125VA) 10 (25VA) -15 30 (125VA) 10 (25VA)
Operating Temperature Storage Temperature	C° C°	0 to +50 -65 to +150
Physical Characteristics 6U VME Card	Inches Centimeters	6.3 x 9.2 16 x 23.37

BBG-SSBA
Specifications

Power Supply

Volts
MiliAmps

Volts

Amps

Volt

Amps

5
500

30 (125VA)
10 (25VA)

-15

30 (125VA)
10 (25VA)

Operating Temperature
Storage Temperature

C°
C°

0 to +50
-65 to +150

Physical Characteristics
6U VME Card

Inches
Centimeters

6.3 x 9.2
16 x 23.37

BBG-SSBA Binary Angle Measurement Format
Bit	Deg./Bit	Min./Bit
1 (MSB)	180	10,800
2	90	5,400
3	45	2,700
4	22.5	1,350
5	11.25	675
6	5.625	337.5
7	2.813	168.75
8	1.405	84.38
9	0.7031	42.19
10	0.3516	21.09
11	0.1758	10.55
12	0.0879	5.27
13	0.0439	2.64
14	0.0220	1.32
15	0.0110	0.66
16 (LSB)	0.0055	0.33

BBG-SSBA Baud Rate Selection
BAUD RATE (bits per sec) Crystal X1 Frequency		Configuration Switch S1
11MHz	22Mhz	8	7	6	5	4	3	2	1
1200	2400	1	1	0	X	X	X	X	X
2400	4800	0	0	1	X	X	X	X	X
4800	9600	1	0	1	X	X	X	X	X
9600	19200	0	1	1	X	X	X	X	X
19200	38400	1	1	1	X	X	X	X	X
1 = off, 0 = on, X = Don't Care

NMEA-0183 Format

The BBG-SSBA can be factory programmed for any NMEA-0183 data format. Current data format is as follows:

$PTBBG,XXX.XX,A*CSCRLF

$        Start of message ascii character 24 Hex
PT       Proprietary message
BBG      BBG Incorporated
XXX.XX   Channel 1 synchro/resolver angle (ex: 045.01) 
A        Validity (A = valid, V = Invalid)
*        ascii character 2A Hex
CS       Checksum (8 bit XOR of characters between $ and *
CR       Carriage return
LF       Line feed

Optional Synchro/
Resolver Outputs

The BBG-SSBA can be factory configured for 90Vrms, 11.8Vrms, and/or 6.8Vrms synchro or resolver outputs at 60Hz or 400Hz. Two power outputs are available: 25VA and 125VA. Custom voltages and frequencies are available upon request. Please specify desired voltage when ordering card.

PIN NO SIGNAL PIN NO SIGNAL
1	RL26 (26V REF- INPUT)	20	+5 VOLTS (INPUT)
2	RL115 (115V REF- INPUT)	21	Do Not Connect
3	RH26 (26V REF+ INPUT)	22	GND
4	RH115 (115V REF+ INPUT)	23	GND
5	S1N	24	RELAY1 (OUTPUT)
6	S1 (OUTPUT)	25	S1 (OUTPUT)
7	S1P	26	RELAY2 (OUTPUT)
8	S2N	27	S2 (OUTPUT)
9	S2 (OUTPUT)	28	DISABLE (INPUT)
10	S2P	29	THERMAL SHUTDOWN (INPUT)
11	S3N	30	FAULT (OUTPUT)
12	S3 (OUTPUT)	31	S3 (OUTPUT)
13	S3P (OUTPUT)	32	-15VOLTS (INPUT)
14	CS-	33	+15VOLTS (INPUT)
15	CS+	34	S4 (S/D INPUT)
16	+15VOLTS (INPUT)	35	S3 (S/D INPUT)
17	-15VOLTS (INPUT)	36	S2 (S/D INPUT)
18	RL1 (S/D INPUT)	37	S1 (S/D INPUT)
19	RH1 (S/D INPUT)

PIN NO SIGNAL PIN NO SIGNAL
1	SPARE	14	RXD422+ (INPUT)
2	RXD232 (INPUT)	15	RXD422- (INPUT)
3	TXD232 (OUTPUT)	16	TXC422+ (OUTPUT)
4	RXC232 (INPUT)	17	TXC422- (OUTPUT)
5	TXC232 (OUTPUT)	18	RXC422+ (INPUT)
6	SPARE	19	RXC422- (INPUT)
7	GND	20	CTLI1 (INPUT)
8	SPARE	21	CTLO2 (OUTPUT)
9	SPARE	22	SPARE
10	SPARE	23	SPARE
11	SPARE	24	SPARE
12	TXD422+ (OUTPUT)	25	SPARE
13	TXD422- (OUTPUT)

PIN NO SIGNAL PIN NO SIGNAL
A9	GND	B23	GND
A11	GND	C9	GND
A15	GND	A32	+5 VOLTS
A17	GND	B32	+5 VOLTS
A19	GND	C32	+5 VOLTS
B20	GND		ALL OTHERS NOT CONNECTED