User's Manual
1678 RFD OPERATION MANUAL 30
(*) At the end of the 200 hours, the Electric Remote Unit can initiate 14 (2-Ohm) blasting
caps connected in series and attached to 100 feet (30 meters) of 18AWG firing cable.
(**) Actual charge time depends on the model of charger used, initial charge of the
battery, and the condition of the battery. This estimate does not include discharge or
reconditioning operations.
3.4. TIMING
ARM TIME 4 ± 0.5 Seconds *
ARM TIME PERIOD (BEFORE AUTO
DISARM)
1 – 60 Minutes (20 Minute Default) **
DISARM TIME 3 ± 0.1 Seconds *
ELECTRIC REMOTE FIRE TIME* 20 Milliseconds *
RSTI FIRE TIME* 225 ± 125 Milliseconds *
(*) This is the delay after the Remote Unit receives the command signal from the
Controller.
(**) This is the amount of time the unit will remain Armed (ready to fire), before
automatically returning to the disarmed state. This figure is normally set at 20 minutes
but can be changed to other values.
3.5. DETONATE OUTPUT
The Electric Remote Unit’s firing circuit has the following characteristics:
CAPACITOR 2,200µF Electrolytic
FIRING ENERGY 2.8 Joule (typical), 1.8 Joule (minimum)
PULSE VOLTAGE LEVEL 50 VDC (typical), 45 VDC (minimum)
MAX FIRING RESISTANCE* 28Ω
*This includes firing cables, detonators, & detonator leg wires.
The RSTI’s firing circuit has the following characteristics:
FIRING ENERGY 0.470 Joule (typical), 0.350 Joule (minimum)
PULSE VOLTAGE LEVEL 2,500 VDC (typical), 2,250 VDC (minimum)