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Table 329: C450CRN-1C Control Module with RS485 Modbus Communications Technical Specifications Specification Description Product C450CRN-1C: System 450 control modules are sensing controls and operating controls with LCD and four-button touchpad UI and no outputs. This control module is an RS485, RTU compliant Modbus subordinate device. Supply Power Internal Supply Power: C450YNN-1C Power Supply Module External Supply Power: 24 VAC (20 to 30 VAC) Safety Extra-Low Voltage (SELV) (Europe), Class 2 (North America), 50/60 Hz, 10 VA minimum Note: A System 450 control module or module assembly can use an internal or an external supply power source, but must not be connected to both simultaneously. Ambient Operating Conditions Temperature: -40 to 66°C (-40 to 150°F) Humidity: Up to 95% RH noncondensing; maximum dew point 29°C (85°F) Ambient Shipping and Storage Conditions Temperature: -40 to 80°C (-40 to 176°F) Humidity: Up to 95% RH noncondensing; maximum dew point 29°C (85°F) Input Signal 0 to 5 VDC; 1,035 ohm at 25°C (77°F) for an A99 PTC Temperature Sensor Analog Input Accuracy Resolution: 16 bit Control Construction Independently mounted control, surface mounted with Lexan ® 950 enclosure suitable for DIN rail mounting or direct mounting to a hard, even surface. Dimensions (H x W x D) 127 x 63 x 63 mm (5 x 2-3/8 x 2-3/8 in.) Weight C450CRN-1C: 207 g (0.46 lb) Compliance United States: cULus Listed; UL 60730-1, File E27734; FCC Compliant to CFR47, Part 15, Subpart B, Class B Canada: cULus Listed; CAN/CSA-E60730-1, File E27734; Industry Canada (IC) Compliant to Canadian ICES-003, Class B limits Europe: CE Mark – Johnson Controls declares that this product is in compliance with the essential requirements and other relevant provisions of the EMC Directive. Australia and New Zealand: RCM mark, Australia/NZ Emissions Compliant 306 Refrigeration Products Catalog

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