Profile: Building Controls & Services, Inc. specializes in offering products & services for HVAC, lighting, security, energy conservation, commissioning and related construction fields. Our services include energy services, building automation & controls, HVAC mechanical, facilities management, commisioning, web technologies and integrated security systems. Building automation systems include computerized maintenance management systems, custom operated interfaces, integrated lighting controls, integrated fire alarm systems, web based platforms and fume hood control systems. The DPC-3 series of digital input cards are available in two varieties. Each card allows for conversion of a single universal input channel to accept up to three voltage free contacts. The card allows for conversion of a single universal input channel to accept up to three voltage free contacts of any mixture such as mercury wetted & triac, which may have inherently large and varying resistances.