Rothenbuhler Engineering Company Inc 1673-1 Manuel D’Utilisation
1673 OPERATION MANUAL REV A
5
2.2.
REMOTE UNIT
Figure 2-2 Remote Unit
2.2.1.
Figure 2-2 shows the Remote Unit. The Remote Unit contains the fire circuits
used for the initiation of detonators. The Remote Unit is normally positioned at a
protected location relatively close to the blast area.
protected location relatively close to the blast area.
2.2.2.
The electronic keys used in the Remote Unit are matched to the Controller
and must be installed for communication, arming and firing.
2.2.3.
The Remote
Unit’s electric detonator circuit develops a minimum of 350V DC
@ 5J with 27Ω of internal impedance. The maximum recommended series firing
resistance (firing cable plus detonators) is 150
resistance (firing cable plus detonators) is 150
Ω for group 1A detonators. Consult the
specifications for the specific detonator that you are using.