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1 INTRODUCTION
1.1 General Information
The DVP-120 Gas Detection and Ventilation Control Panel is a microcomputer based control panel used to
operate ventilation fans based on the inputs from remotely mounted gas transducers. The unit is fully tested
prior to leaving the factory, and is ready for operation after the wiring is complete and the user system
configuration is entered.
System wiring includes the main power connection for the DVP-120, current loop and power connections
between the remote sensors and the DVP-120, the fan control connections and/or alarm connections from the
DVP-120 to the building ventilation and automation systems. Refer to Figure 1-1 for a representative system-
wiring diagram.
The system configuration is entered by the user through the LCD display and keypad. Refer to Figure 1-2 for
equipment locations. The system display provides the user with the system status, and the status of each
configured sensor. In addition, all control functions of the DVP-120 may be accessed through the system
display and keypad.
1.2 Features
– Twelve analog (current loop) input channels
– Three 16A, 240 VAC SPDT fan/alarm relays
– Drivers for external Horn and Strobe
– Externally visible system, alarm and relay status indicators
– Externally visible LCD display showing the status of each transducer and relay
– External keypad for user selection of the transducer/alarm display and setting the configuration
(password protected)
– Up to three ventilation control zones can be defined
– Each zone can be controlled based on transducer signals and/or time of day
– Each relay is configurable for delay before activation and minimum on time
– Fail safe operation can be implemented
– Lockable Nema 1 type enclosure
– Modular input and output connectors
1.3 Compatible Macurco Transducers
Carbon Monoxide (CO):
– CM-2B – Solid State sensor with local concentration display (ppm)
– CM-3 – Electrochemical sensor with local concentration display (ppm)
Nitrogen Dioxide (NO):
– ND-2 – Electrochemical sensor with local concentration display (ppm)
Combustible Gasses (EX):
– GT-11A – Solid State Sensor
Revision 0.07
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