ULTRA 4 INSTRUCTION MANUAL 
 
24 
Interface Connections 
The SD card slot labelled ‘SD’, and the RJ11 socket labelled ‘PC’ are situated 
on the LCD display board as detailed below: 
 
 
 
 
 
 
 
Terminal Connections 
Power 
Ultra 4 can operate from mains AC and automatically from DC or battery 
backup in the event of a power failure or can be operated permanently from 
DC or batteries. 
Transducer/sensor 
The transducer should be installed, and connected, in accordance with the 
installation instructions contained in the Transducer User Guide. 
The entire range of, standard dB transducers and mmWave dBR sensors are 
certified for use in hazardous areas. See the product label for certification 
details. Wire the transducer to the Ultra 4’s transducer terminals, as follows: 
When using 2-core screened extension cable, the Black and Green wires of 
the transducer should be connected to the screen of the extension cable 
which in turn should be connected to the appropriate 0 volts’ terminal of the 
Ultra 4.