Chapter 8: Wiring Diagrams and Pin
Bi-Phase/GPI/Pilot Pin Diagram
Bi-Phase/GPI/Pilot
GPOUT3_B XREF=9
12V_OUT VR1
6 7 8
3 2 1
XREF=9 GPOUT0_B
XREF=9 GPOUT1_A
XREF=9 GPOUT1_B
XREF=9 GPOUT2_A
XREF=9 GPOUT2_B
XREF=9 GPOUT3_A
XREF=9 OPTRETURN
XREF=9 BIPHB_I
XREF=9 BIPHA_I
XREF=8 PILOT_IN+
XREF=9 RET0
XREF=9 GPIN0
XREF=9 RET1
XREF=9 GPIN1
XREF=9 RET2
XREF=9 GPIN2
XREF=9 RET3
XREF=9 GPIN3
XREF=9 GPOUT1
XREF=9 GPOUT0
XREF=9 GPOUT0_A
XREF=8 PILOT_IN-J3
27
26 1 14 25 24 23 22 21 20 19 18 17 16 15 13 12 11 10 9 8 7 6 5 4 3 2
C4
C3
FB33 1
2
3
V.REG,78L12ACM,+12V,0.1A,S0-8 SOL8
480508807-00 VOUT
GND3 GND4 VIN
GND1 GND2
5 4
NC NC VCC_P15V
GND
5V DB25F_RA
0.1UF
1.0UF
GND_C
GND_C
DSS306_55Y271M FILTER_EMI
270101433 L_3P
Biphase/GPI/Pilot
Bi-phase/Tach OptoCoupler Input
Bi-phase/Tach
XREF=13 BIPHB
XREF=13 BIPHA
XREF=9 BIPHA_I
XREF=9 BIPHB_I
U5
3 2
5 7
6
XREF=9 OPTRETURN
R79
R77 U6
3 2
5 7
6
R49
C27
C25 R47
R46
5V
GND 6N137_DP
IC, OPTOCOUPLER 320003987
DIP8
+ EN
-8 VCC GND
GND 1K
1K 6N137_DP
IC, OPTOCOUPLER 320003987
DIP8
+ EN
-8 VCC GND 5V
1K
0.1UF
0.1UF 634
634 GND_C
GPI Relay Outputs
GPI Relay Output
XREF=9 GPOUT2_E2 XREF=9 GPOUT3_E2 XREF=9 GPOUT3_A
XREF=9 GPOUT2_A
XREF=9 GPOUT1_E2 XREF=9 GPOUT1_A
XREF=9 GPOUT0_A XREF=9 GPOUT0_E2
K1 K2 K3 K4
XREF=9 GPOUT3_B
XREF=9 GPOUT2_B
XREF=9 GPOUT1_B
XREF=9 GPOUT0_B
GND GND GND GND
RELAY 1 3
7 5
RLY_SIP4_DG1A_BW RELAY 1 3
7 5
RLY_SIP4_DG1A_BW RELAY 1 3
7 5
RLY_SIP4_DG1A_BW RELAY 1 3
7 5
RLY_SIP4_DG1A_BW
GPI (TTL)/MTC Outputs
GPI TTL/MTC Output
NC FB20
1 2
3R3
J10 742 6531 XREF=4MIDI_OUT XREF=13GPOUT3_E XREF=13GPOUT2_E XREF=13GPOUT1_E XREF=13GPOUT0_E XREF=13GPOUT1_O XREF=13GPOUT0_O
XREF=9GPOUT3_E2 XREF=9GPOUT2_E2 XREF=9GPOUT1_E2 XREF=9GPOUT0_E2
FB21
1 2
3U269 8 7 6
11 12 13 14 15 16 17 18 20191 10
5 4 3 2
C87
C86
R4 R119R121 C85 XREF=9GPOUT0
XREF=9GPOUT1 FB30
1 2
3 FB29
1 2
3
NC
NC GND_CGND_C
DSS306_55Y271M FILTER_EMI 270101433 L_3P
5V GND_C
221R DIN_5F_PIN 210401223 DIN5
DIN5F_DIN5 GND_C
5V
DSS306_55Y271M FILTER_EMI 270101433 L_3P GND
GND74FCT2541_SL 326904606
D0
D1
D2
D3 GNDVCC
D4
D5
D6
D7 Y6
Y7 Y5 Y4 Y3 Y2 Y1 Y0 OE1 OE2 GND
220PF
220PF GND
221R 221R221R 0.1UF
GND_C GND_C
DSS306_55Y271MFILTER_EMI 270101433 L_3PDSS306_55Y271M FILTER_EMI 270101433 L_3P
MTC OUT
GPI (opto) Inputs
GPI (opto) Input
XREF=2 GPIN3_I
XREF=2 GPIN2_I
XREF=2 GPIN1_I
XREF=2 GPIN0_I
XREF=9 GPIN0 XREF=9 GPIN2
XREF=9 RET0 XREF=9 RET1 XREF=9 RET2 XREF=9 RET3
R85 R86
XREF=9 GPIN1 XREF=9 GPIN3
R56
R88
R55
R87
R54
R53
R52
U8
3 2
5 7
6 U9
3 2
5 7
6 U10
3 2
5 7
6 U11
3 2
5 7
6
C36
C35
C34
C33 5V
5V
GND 5V
GND GND GND
1K 1K 5V
1K
1K
392
1K
392
392
392
6N137_DP IC, OPTOCOUPLER
320003987 DIP8
+ EN
-8 VCC GND
6N137_DP IC, OPTOCOUPLER
320003987 DIP8
+ EN
-8 VCC GND
6N137_DP IC, OPTOCOUPLER
320003987 DIP8
+ EN
-8 VCC GND
6N137_DP IC, OPTOCOUPLER
320003987 DIP8
+ EN
-8 VCC GND
0.1UF
0.1UF
0.1UF
0.1UF
Connector Pin Assignments
Mac Serial Port Connector Pin Assignments
Mac Serial Port
Pin # Name Description Mac Connection
1 NC No connection Pin 2 (HSKiB)
2 RTS_IN Request To Send (input to SYNC HD) Pin 1 (HSKoB)
3 RX_OUT Transmitted data (output from SYNC HD) Pin 5 input (RXDB–)
4 GND Chassis ground Ground
5 TX_IN Received data (input to SYNC HD) Pin 3 output (TXDB–)
6 GND Chassis ground Pin 8 input (RXDB+)
7 CTS_OUT Clear To Send (output from SYNC HD) Pin 7 input (GPiB)
8 NC No connection Pin 6 (TXDB+)
Shell GND Chassis ground Ground
Bi-phase/Tach/GPI/Pilot Port (Accessory Port) Connector Pin Assignments
Pin # Name Description
1 GPOUT0 GPI TTL-level output 0
2 GPOUT1 GPI TTL-level output 1
3 GPOUT0_A GPI Relay 0, contact A
4 GPOUT0_B GPI Relay 0, contact B
5 GPOUT1_A GPI Relay 1, contact A
6 GPOUT1_B GPI Relay 1, contact B
7 GPOUT2_A GPI Relay 2, contact A
8 GPOUT2_B GPI Relay 2, contact B
9 GPOUT3_A GPI Relay 3, contact A
10 GPOUT3_B GPI Relay 3, contact B
11 OPTRETURN Return from Bi-phase/Tach opto-isolators
12 BIPHB_I Input to Bi-phase/Tach opto-isolator B
13 BIPHA_I Input to Bi-phase/Tach opto-isolator A
14 GND Chassis ground
15 PILOT_IN– Pilot tone input, negative
16 PILOT_IN+ Pilot tone input, positive
17 RET0 Return from GPI opto-isolator “0”
18 GPIN0 Input to GPI opto-isolator “0”
19 RET1 Return from GPI opto-isolator “1”
20 GPIN1 Input to GPI opto-isolator “1”
21 RET2 Return from GPI opto-isolator “2”
22 GPIN2 Input to GPI opto-isolator “2”
23 RET3 Return from GPI opto-isolator “3”
24 GPIN3 Input to GPI opto-isolator “3”
25 VDD +12V DC
Shell GND Connected to chassis ground
SYNC HD Cable Pin Assignments
SYNC HD Serial Cable A 12-foot Serial cable is included with the SYNC HD to support connection of the SYNC HD to the serial port on a Avid HDX card, HD Native card, or HD Native Thunderbolt peripheral.
If you need to make a custom serial cable, refer to the following pin assignment table for the SYNC-to-Serial port cable.
Bi-phase/Tach/GPI/Pilot Port Interfacing Notes
The six opto-isolators are 6N137 devices. The four GPI input ports pass through 390 ohm series resistors to the cathode. The two Bi-Phase/Tach in-puts pass through 634 ohm series resistors to the cathode.
The two TTL-level GPI outputs are driven by a 74FCT541. Each output passes through a 220 ohm series resistor.
12 volts is supplied at the connector for the pur-pose of driving the opto-isolators in film tach ap-plications. It is regulated and can supply up to 100mA.
For Tach, the “rate” input is “BIPHA_I” and the
“direction” input is “BIPHB_I.” The polarity of
“BIPHB_I” is software programmable and de-faults to “low” for “forward.”
For Bi-phase, the default polarity relationship between A and B is software programmable. The default setting for “forward” is “A leads B.” This means that the rising edge of A (0° phase) must precede the rising edge of B (90° phase).
For highest signal quality, use a 25-pin cable with individually shielded conductors.
GPI Relay Wiring for Fader-Start
SYNC HD has a total of four Relay-level GPI out-puts on pins 3/4, 3-10 of the DB25 connector (see the circuit diagram GPI (TTL)/MTC Outputs).
The GPI Relay outputs are intended to drive Relay loads only.
SYNC-to-DigiSerial cable
Mini DIN 8-pin Male to Mini DIN 8-pin Male
1 2
2 1
3 5
4 4
5 3
6 8
7 7
8 6
GPI Triggers
GPI output signals information:
0 (relay) = Play
1 (relay) = Record Ready 2 (relay) = fader start #1 3 (relay) = fader start #2 4 (TTL) = Stop
5 (TTL) = Record
Logical GPI numbers 0 through 3 are associated with GPI relay outputs 0 through 3 (pins 3 through 10). GPI numbers 4 and 5 are associated with GPI TTL outputs 0 and 1 (pins 1 and 2).
GPI TTL WIring
The circuit can drive approximately 2 mA through a load of 1.6K and maintain a logic high level of 3.3V. In an application where the equipment being controlled has more demanding power require-ments, an external buffer or relay circuit mst be used. This would typically be constructed as part of a custom electrical interface.
Each GPI TTL output is fully short-circuit pro-tected via a 220-ohm series resistor.
Before attempting to wire any type of custom interface, always check the electrical specifications provided by the equipment manufacturer, including voltage levels, current, loading and polarity. Incorrect wiring may damage your equipment, the SYNC HD, or cause personal injury.