User manual

46
Powered Output
NOTE: Determine the type of powered output according to the following information
before attempting any connection to the Interface connector of the eyesite 550.
Relay Control
Relays requiring less than 150mA and 12 VDC to drive the relay coil.
Connect the relay control coil across pins 3 (-) and 4 (+).
Relays requiring more than 150 mA or a different drive voltage.
1. Attach a power source capable of powering the relay control coil in series with
the relay control coil.
2. Complete the loop using the Common Ground (5) and Relay Out (4) terminals.
Audio Inputs
Unbalanced Audio
Connect an unbalanced (grounded) line level (1v p-p) audio source between
pins 5 (Common Ground) and 8 (Audio In +). Input impedance is 47kOhm
(i.e. Hi-Z).
Balanced Audio
Connect a balanced line level audio source between pins 7 (Audio In-) and 8
(Audio In +). Input impedance is 94 kOhm (i.e. Hi-Z). If a long line is used a
600 Ohm termination resistor may improve the signal.
Audio Outputs
Unbalanced Audio
Connect to an unbalanced (grounded) line level (1v p-p) audio output between
pins 5 (Common Ground) and 1(Audio Out +).Output impedance is 600 Ohms
Balanced Audio
Connect a balanced line level audio output between pin1(Audio Out +) and
2(Audio Out-). Output impedance is 600 Ohms.