084B8007
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The 084B8007 features a supply voltage of 24V AC and operates at a frequency of 50/60 Hz with a power consumption of 8 VA. Designed by Danfoss and part of the Danfoss Cables and Accessories series, it manages up to 8 fans and controls capacity through pressure or temperature inputs. The unit weighs only 0.44 kilograms.
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Product Description:
The model 084B8007 is a pack controller designed for regulating compressor and condenser capacities in small scale refrigeration systems. It allows for the connection of multiple compressors and condensers.
The 084B8007 Pack Controller from Danfoss features eight outputs with expandability possible through an external relay module. It offers key advantages such as patented neutral zone regulation, various compressor constellation configurations and support for both sequential and cyclic operations. The unit also enables suction pressure optimization via data communication. This controller uses signals from pressure transmitters and temperature sensors for regulation. It supports two pressure transmitters for compressor and condenser regulation plus one temperature sensor to measure air temperature before the condenser. These pressure transmitters can be replaced with temperature sensors for brine systems. It accommodates pressure regulation types including P0 (pack), Pc (pack/chiller) and pressure regulation with variable reference (Sc3). It also supports temperature regulation Sx (chiller). The input signals include two pressure transmitters (AKS 32R) and three temperature sensors (PT 1000 ohm/0°C or PTC 1000 ohm/25°C).
The 084B8007 pack controller features eight digital inputs for safety circuit monitoring, three inputs for alarm function and two inputs for alarm or reference displacement. The relay outputs for capacity regulation include 8 SPST relays rated at 2 A (inductive). It includes one SPST relay for AKD start/stop and one SPDT alarm relay rated 3 A (inductive). The voltage output range is 0 – 10 V DC, max 5 mA with internal resistance of 2.2 kohm. The supported display modules include EKA 163 for PC display and EKA 165 (164) for operation, P0 display and LED interface. The data communication of this model is possible via an external communication module.
Frequently Asked Questions about 084B8007:
Q: What voltage signal output features are available in the 084B8007 controller for external analog integration?
A: It provides a 0–10 V DC analog signal output with internal 2.2 kΩ resistance. This allows smooth integration with actuators or regulators requiring proportional analog feedback.
Q: How does the 084B8007 pack controller regulate suction pressure and adapt to brine system configurations?
A: It uses dual pressure transmitters and one condenser air temperature sensor for suction control. For brine systems, it allows replacement of pressure inputs with temperature sensors.
Q: What makes the 084B8007 pack controller suitable for multi-compressor refrigeration setups requiring adaptive sequencing?
A: It supports both sequential and cyclic compressor constellation control. The patented neutral zone logic ensures stable capacity regulation across variable load conditions.
Q: How do the digital and relay inputs on the 084B8007 controller contribute to safe and flexible refrigeration control?
A: It offers eight digital inputs for safety circuit feedback and additional channels for alarms or reference displacements. Relay outputs manage compressor and AKD activation under load control.
Q: How does the 084B8007 pack controller enable data visibility and control interface access for refrigeration technicians?
A: It supports EKA 163 for PC interface and EKA 165/164 for direct user interaction. These modules display operating states, alarms, and system setpoints in real time.
