Daktronics 2000 Rodeo OmniSport - Manual (Page 22)

14 Timing System Setup
Horn Outputs
Connect the 150' (47.5 m) 4-pin horn cable (part # 0A-1163-0007) between the J34 HORN
RELAY jack and the J1 SIGNAL IN jack of the external horn assembly (part # 0A-1163-0005).
The horn is connected to an enclosure with a 12 VDC battery (part # BT-1009). A 12 VDC wall
plug-in charger (part # 0A-1088-0013) may provide power and charge the batteries.
To broadcast a horn tone to a public address (PA) system, connect a male-RCA-to-male-XLR
audio cable (part # 0A-1163-0032) between the J35 HORN AUDIO jack and the PA system
(by others).