BAS-3520C 20-ch Web-enabled Chiller DDC Controller Features NEW Standalone programmable controller BASPro programming software provides BA domain function (scheduler, HVAC calculation, sequence…) Auto-tuning PID control Calendar schedule control Alarm and event notifications Provides RS-485 to connect with remote I/O devices Up to 3 local I/O expansion modules Remote programming and maintenance through Ethernet LCM display (optional) RoHS COMPLIANT 2002/95/EC Introduction BAS-3520C is a standalone programmable controller specially designed for HVAC Chiller Control applications. Designed as a typical DDC (Direct Digital Controller), BAS-3520C delivers various of onboard I/O including universal input, and digital output, providing flexible options to satisfy versatile application requirements. It also features powerful BASPro programming tool for engineers to quickly develop their application. BASPro delivers many function blocks suitable for BA application, such as scheduler, HVAC calculation, sequential control, PID control, alarm, and event. Its compact size makes it an ideal solution to fulfill chiller plant control applications. The I/O expansion modules (BAS-3018, BAS-3024, BAS3050, BAS-3051 and BAS-3060) provide more I/O points and make the system a scalable solution. Specifications General Digital Output Channels 8 ( Form A) Breakdown Voltage 1000 VAC (50/60 Hz) Contact Rating AC: 5 A @ 250 V (Resistive) DC: 5 A @ 30 V Initial Insulation 1G ohm min @ 500 VDC Resistance Relay Off Time 5.6ms (Typical) Relay On Time 5.6ms (Typical) Maximum Operating 6 operations/min (@ related load) Speed PWM Output (2 channels) Minimum Period 1 second (for PWM output) Minimum Pulse Width 0.5 second (for PWM output) Dimension (W x H x D) 176 x 120 x 44 mm(6.93" x 4.72" x 1.73") Enclosure ABS + PC Power Input 24 VDC/24 VAC Power Consumption 10 W @ 24 VDC Real-time Clock Yes Watchdog Timer Yes I/O Isolation Protection 500 VDC For Relay Digital Output 3000 VDC For Universal Input Hardware CPU Flash Memory RAM Battery Backup SRAM 32-bit CPU 312 MHz 32 MB 64 MB SDRAM 512 KB Communication LAN RS-485 Communication Protocol LCM Operation Unit (Optional) 1 x 10/100Base-T (RJ-45) 1 (isolated) Modbus/TCP, Modbus/RTU Environment Universal Input Channels 12 Resolution 16-bit Sample Rate 10 Hz (Total) Accuracy ±0.1% of FSR (Voltage, Current) Type and Range Analog Input 0 ~ 10 V, 0 ~ 20 mA, 4 ~ 20 mA, Pt-100 RTD, Pt-1000 RTD, Thermistor (3 k, 10 k) Digital Input Logic High: Close (Dry Contact) Logic Low: Open Over Voltage Protection±35 V Span Drift ±25 ppm/° C Zero Drift ±6 μV/° C 25-10 2 line x 8 char, backlit LCD 5 button keypad Hot swap capable Building Automation Systems Operating Temperature -10 ~ 60° C (14 ~ 140° F) (with airflow) Storage Temperature -20 ~ 75° C (-4 ~ 167° F) Operating Humidity 20 ~ 95% (Non-condensing) Storage Humidity 0 ~ 95% (Non-condensing) Ordering Information BAS-3520C-AE BAS-3595-AE 20-ch Web-enabled Chiller DDC Controller LCM operation unit (Optional)