Grass Valley Maestro Master Control v.1.7 - Manual (Page 159)

Maestro Channel Branding User Guide 155
5th Step: Input/Output Sets
Table 1. Maestro Rear Panel, GPIO 44-pin Connector Pinouts
Figure 118. GPIO Port Circuitry
Shielded 44-Pin D; socket
contacts
Pin GPIO Pin GPIO
1 1A 23 10A
2 1B 24 10B
3 2A 25 GND
4 2B 26 11A
5 GND 27 11B
6 3A 28 12A
7 3B 29 12B
8 4A 30 GND
9 4B 31 13A
10 GND 32 13B
11 5A 33 14A
12 5B 34 14B
13 6A 35 GND
14 6B 36 15A
15 GND 37 15B
16 7A 38 16A
17 7B 39 16B
18 8A 40 GND
19 8B 41 NC
20 GND 42 NC
21 9A 43 LTC RX IN+
22 9B 44 LTC RX IN–
D-50 Female
Pin
18
Pin
34
Pin
34
Pin
1
Pin
50
Pin
17
V CC
From
Maestro
logic
GPIO
rear panel
connector
To
Maestro
logic
V OUT
ON = 3-10 V, 4.25 mA max.
Input photocoupler
NEC PS2705-1
Maximum current through relay = 250 mA
Maximum voltage for relay = 10 V
Output relay
International Rectifier PVG613
2.2 K, 0.1 W
B
A
10K
Note: To prevent a ground loop, use pins
"A" and "B" only when connecting Maestro
to an external device. Do not connect a third
conductor as a common ground path (e.g.,
do not connect the connector shields).