Direct Digital Control
The ASIC/3-9536 represents a new generation of communicating distributed direct digital control. The ASIC/3-9536 controller is designed to be compatible with the ASIC/2 Programmable controllers and offers expanded communication capability including USB, BACnet, and Ethernet.
The ASIC/3-9536 provides energy management and control of systems and equipment including:
- Air handlers
- Cooling towers
The ASIC/3-9536 controller can be applied to integrations of retail stores, branch banks, or other larger commercial buildings to maintain and manage building automation systems.
The controller is easily configured using ASI Visual Expert. Users can specify scheduling, PID control, alarming, optimum start, trending, run-time accumulation, electrical demand management, and other variables. The ASIC/3 has an on-board battery-backed calendar clock and allows special events, holidays, and schedules to be defined in advance. Configuration data is stored and retained through power loss.
The ASIC/3 controller has separate RS-485 system and local buses and allows local communication with the controller. The system bus is used to network multiple controllers, or can support BACnet MS/TP. The local bus can poll terminal controllers and make control decisions based on the data received. A central system is not needed to supervise the controller, and either local bus can support Modbus Master RTU. Red and green LEDs indicate the controller’s is functioning.
The ASIC/3 can operate as part of a larger communicating control network. The ASIC/3 offers Ethernet communication and alarm notification via wired 10/100 Mbps connection. The ASIC/3 also features a full-speed 12 Mbps USB Device connection for service in the field. The RS-485 connections support baud rates up to 57,600 bps, and standard BACnet MSTP baud rates up to 76,800 bps are also supported.
Under selected event conditions the controller can send notify messages via Ethernet to a computer running ASI Weblink software. Temperatures, setpoints, and other controller data may be easily reported to ASI WebLink or other OPC client software.
The twelve 24 Vac relay outputs are ideal for driving contactors and starters. The eight analog outputs are used for modulated actuators, electronic-pneumatic transducers, variable speed drives and other analog signal devices. The 16 universal inputs may be used for counting pulses, for reading thermistors and contact closures directly, and for reading 4 to 20 mA, 0 to 5 Vdc or 1 to 5 Vdc input signals. The ASIC/3-9536 Molex interface is pin-compatible with ASIC/2-7540 and -7040 controllers, and it accepts the same MWH-74 wiring harness as ASIC/2-7×40 controllers.