User's Manual

 Safety hazard prevention
The scope of the 3M™ Dual Comm RF Monitoring Receiver safety features includes:
 Fire Resistance – Flame resistant material is incorporated into Receiver case
material. This provides a V0-94 flammability rating, which reduces the Receiver's risk
of fire hazard following an electrical short-circuit or a lightning strike. All plastic
materials within the Receiver (such as printed circuit boards, electrical wire coating,
etc.) are UL approved with a V0-94 flammability rating.
 High Voltage Isolation and Insulation – Protection is included against high-voltage
penetration via the Receiver's power supply, or via the phone line following a
lightning strike.
The 3M™ Dual Comm RF Monitoring Receiver's 110VAC or 220VAC to 12VDC power
adapter features double insulation; a single failure in the adapter will not transfer the
110 VAC or 220VAC into the unit. Furthermore, a 2A fuse is provided to compensate for
unexpected high-power consumption, which may be an indication of a short circuit.
The phone-related circuits feature a galvanic separation from the low-voltage circuits by
means of opto-couplers and transformers at the interfaces between the two circuit types.
In addition, the non-conductive plastic Receiver case provides insulation between the
user and the electronic components within the unit.
 Durability
The 3M™ Dual Comm RF Monitoring Receiver unit is made of a fire-resistant, rugged
ABS case. The V0-94 flammability rating of the unit case provides the highest degree of