Installation 
 
 
3M™ Drive-Thru Systems Model G5 and Model XT-1 
Installation Manual 
March 2014 – Revision 2.0 
Page 23 of 74 
Definition and Connection Information 
Positive phase grill monitor speaker 
Negative phase grill monitor speaker 
BACKUP INTERCOM: All of the wires on this terminal block go to the backup intercom 
Positive phase microphone 
Negative phase microphone 
Microphone wire shielding 
Positive phase order point speaker 
Negative phase order point speaker 
Positive phase of grill monitor speaker 
Negative phase of grill monitor speaker 
Vehicle detector (normally open) 
If backup intercom includes external vehicle detector module, use this terminal 
If installation includes external greeter module or timer module and backup 
intercom has an active low GRT_CNL output, use this terminal 
INTERBASE_1: All wires on this terminal block go to INTERBASE_1 terminals on the interconnected base station 
Positive in (connects to positive out on interconnected base station) 
Negative in (connects to negative out on interconnected base station) 
Positive out (connects to positive in on interconnected base station) 
  OUT-  negative out (connects to negative in on interconnected base station) 
INTERBASE_2: All wires on this terminal block go to INTERBASE_2 terminals on the interconnected base station 
  IN+  Positive in (connects to positive out on interconnected base station) 
  IN-  Negative in (connects to negative out on interconnected base station) 
  GND  Ground 
Positive out (connects to positive in on interconnected base station) 
negative out (connects to negative in on interconnected base station) 
UART (transmit) connects to UART_RX on interconnected base station 
UART (receive) connects to UART_TX on interconnected base station 
Network connection (crossover cable to PC or patch cable to network) 
Shorting this pin to GND will switch between Split Lane and Cross Lane modes 
Shorting this pin to GND will move through the order taking modes 
Shorting this pin to GND will switch between day and night modes 
Shorting this pin to GND will play a selected message (if optional greeter board 
is installed) 
Active low vehicle approaching