Grass Valley 3e Student CameraMan Rev.B - Manual (Page 8)

Page 5
Mounting And Connecting The PRM
Connecting the PRM to the CameraMan
Using a 4-conductor cable, wired in a “straight-through” mode and terminated with modular
handset connectors, connect the RS-485 port on the back of the PRM to the
RS-485 port on the back of the CameraMan Camera.
Connecting the Contact Closure Outputs
The PRM’s AUDIO RELAY and VIDEO RELAY contact closure outputs are activated when a
“press-to-talk” microphone button is pressed, and deactivated when the button is released.
Your specific application will determine how to connect these to your system.
AUDIO RELAY
The intended application of this relay is to activate the mute switch of the audio system in the
room to prevent feedback when the microphone is active. The relay activates and the contacts
close only when a microphone button is pressed. In a typical application, the Audio Relay
contact closure would connect to an amplifier or audio switcher.
VIDEO RELAY
The intended application of this relay is to activate a video switcher to select between various
video sources. The relay activates and the contacts close only when a microphone button is
pressed. When the contact relay is closed, there is a two second delay to allow time for camera
movement before the video is switched. In a typical application, the Video Relay contact
closure would connect to a video switcher.
To Connect the Audio, or Video Relay:
1. Connect one end of a 2-conductor cable to the green connector block:
• Strip a short section (approximately 0.15”) off the end of the wire
• Insert the wire into the AUDIO RELAY or VIDEO RELAY screw terminal slot on
the connector block to the far right (the positive “+” lead is on top, the
negative “-” lead is on the bottom).
• Tighten the terminal screw
2. Connect the other end of the cable to your audio equipment per their instructions.
PRM connected to CameraMan via RS-485 cable
PRM Audio and Video
Relay Outputs