JOHNSON CONTROLS 4214-001

Product Brief Introduction

• This unit is the exclusive master onsite operation display terminal custom-developed by Johnson Controls to match the full set of UNISAB III centralized refrigeration control system, specially configured for Sabroe brand reciprocating compressors, screw compressors and industrial water chilling unit equipment sets.
• It acts as the unique onsite data interaction gateway between field refrigeration equipment and core system PLC controller, undertaking full parameter visualization, local operation command input and system fault diagnosis output functions of the whole refrigeration unit set.
• Every finished unit undergoes continuous 72-hour factory aging testing, full function calibration and EMC electromagnetic compliance inspection per IEC industrial control standard before factory delivery, supporting uninterrupted long-term stable operation inside industrial refrigeration plant environment.

3. Technical Specifications (Core parameters marked in bold)

Electrical Specification

1. Rated Operating Input Voltage: DC 24V ±10%, power consumption fixed at 18VA maximum full-load working power
2. Communication Bus Standard: Exclusive UNISAB dedicated RS485 field bus protocol, fixed baud rate 9600bps, 8 data bit, 1 stop bit, no parity check configuration
3. Isolation Grade: Internal signal circuit and power supply adopt optocoupler full electrical isolation, isolation withstand voltage ≥2500VAC
4. Working Ambient Temperature Range: 0℃ ~ +55℃ continuous operating range; certified storage temperature range: -30℃ ~ +70℃
5. Relative Humidity Requirement: 5%~95% non-condensation rated operating humidity, no corrosive gas environment
6. Enclosure Protection Grade: Front operation panel IP54, rear wiring terminal area IP20 standard protection rating

Physical Dimension Specification

1. Overall Outer Size: 212mm (Width) ×138mm (Height) ×62mm (Depth)
2. Mounting Cutout Dimension: 196mm×122mm fixed panel embedded installation opening size
3. Net Single Unit Weight: 0.92kg, original packaging gross weight 1.45kg including mounting accessories and wiring terminal fittings

Display Hardware Specification

1. Display Screen Type: 128×64 dot matrix backlight LCD monochrome screen, fixed white LED constant backlight source
2. Single display data area: 8-row ×24-character fixed text display format, supports dual-unit parameter simultaneous display

4. Functional Features

1. Full-process real-time data monitoring function: Synchronously acquire and display compressor suction/discharge pressure, suction/discharge temperature, motor winding temperature, lubricating oil temperature, oil pressure, running frequency, equipment cumulative operating hours and auxiliary cooling system running status data from UNISAB III main controller in real time.
2. Local manual operation control function: Complete onsite start-stop of single or grouped refrigeration compressors, modify temperature/pressure control setpoints, adjust loading/unloading percentage of screw compressor via front panel physical keypad without upper computer auxiliary equipment.
3. Multi-level alarm management function: Automatically pop up fault code and detailed failure description on display screen once equipment exceeds preset operating threshold; support onsite alarm acknowledgement, historical alarm record query and alarm data storage for up to 990 pieces of historical fault information.
4. Built-in system diagnostic function: Real-time self-check of internal communication circuit, backlight drive circuit and key scanning circuit; feed fixed fault code on display when internal hardware abnormity occurs for targeted maintenance positioning.
5. Multi-level user access permission lock function: Divided into three access grades: operator level, equipment maintenance level, system administrator level; administrator can set password lock to restrict unauthorized parameter modification and equipment startup operation.
6. Offline parameter backup function: Built-in non-volatile EEPROM storage chip, all user modified set parameters automatically save inside chip after confirmation, data remains complete after complete power failure of the whole unit.

5. Performance Parameters

Communication Performance Index

• Bus communication response delay: ≤120ms for single data frame transmission under full-load multi-equipment networking status
• Maximum networking access quantity: Supports real-time data interaction with up to 16 sets of UNISAB III local control modules under single bus loop
• Communication anti-interference index: Pass IEC61000-6-2 industrial EMC surge and pulse group interference test standard

Display & Operation Performance Index

• LCD backlight service lifespan: Minimum rated continuous lighting life ≥50000 hours under rated operating environment
• Physical keypad service cycle: Single key rated effective pressing times ≥500,000 times without contact failure
• Parameter display precision: All pressure/temperature numerical display reserved 1 decimal place, consistent with field sensor transmission precision standard

Reliability Performance Index

• Rated MTBF (Mean Time Between Failures): ≥85000 hours under specified standard industrial operating condition
• Vibration resistance standard: Comply with IEC60068-2-6 vibration test specification (10~150Hz frequency sweep test) for refrigeration workshop environment
• Factory calibration valid period: 24 months per original factory product calibration specification

6. Material Composition

1. Front Panel Outer Shell: High-strength flame-retardant ABS engineering plastic with matte anti-scratch surface coating, UL94-V0 fireproof certification grade
2. Rear Main Enclosure Frame: Die-cast aluminum alloy fixed support frame with anti-rust electrophoretic coating treatment, provide stable installation positioning and internal component heat conduction dissipation
3. Internal Core Circuit Substrate: FR-4 high-temperature resistant double-sided copper clad PCB circuit board, full lead-free tin plating surface processing
4. Display Component: Industrial-grade LCD liquid crystal screen with high-low temperature resistant polarizing film, constant-current driven LED backlight strip
5. Operation Input Part: Gold-plated dome metal membrane key switch assembly, dustproof silicone outer key cap
6. Storage Core Component: Industrial grade SMD EEPROM memory chip, wide voltage range industrial control dedicated MCU main control chip
7. Wiring Terminal Part: Copper alloy nickel-plated spring wire terminals with PA66 flame retardant plastic terminal base

7. Structural Characteristics

1. Overall split three-section modular structure: Separated into front operation panel assembly, middle main control circuit cavity and rear wiring terminal cavity three independent sealed components, fixed via stainless steel locking screws without mutual structural interference
2. Front panel layout: Upper area embedded LCD display window with transparent scratch-resistant PC protective cover; middle section arranged 12-key numeric and function integrated keypad; bottom fixed standard UNISAB system brand identification and product specification printed area
3. Internal cavity isolation design: Aluminum alloy partition board isolates main control circuit area and backlight drive area to avoid heat radiation from backlight component affecting core MCU operation precision
4. Rear terminal layout: Top position reserved dedicated RS485 bus wiring terminal row; lower area arranged DC24V power input terminal block, fixed embedded installation buckle structure on left and right sides of rear shell for panel embedded mounting fixation
5. Dustproof structural design: All panel splicing gaps equipped with closed-cell rubber foam sealing strip to block workshop dust and water vapor entering internal circuit cavity

8. Working Principle

1. Power supply input stage: External standard DC24V regulated power access rear terminal block, internal built-in EMI filter circuit converts unstable input voltage into multi-channel stable DC working voltage for MCU main control chip, LCD drive circuit and keypad scanning circuit respectively.
2. Bus data receiving stage: Core MCU continuously send data request command through dedicated RS485 UNISAB bus to UNISAB III central PLC controller; PLC feeds back real-time field equipment operating data including temperature, pressure and motor state to 4214-001 unit after receiving request signal.
3. Data processing & display stage: Main control chip sorts, converts and formats received raw digital data per factory preset program, then transmit processed data to LCD drive chip to complete numerical and text real-time screen display.
4. Operation command output stage: When onsite operator presses front panel function keys, keypad scanning circuit feeds trigger signal to MCU; MCU converts manual operation instruction into standard UNISAB bus protocol data frame and transmit to central PLC via RS485 bus; PLC executes corresponding startup, shutdown or parameter modification action after verifying valid command.
5. Fault judgment & storage stage: Main control chip continuously monitor received field equipment data; once numerical value exceeds pre-stored upper/lower limit threshold, system automatically generate corresponding fault code, pop alarm information on display and write fault time + fault content into built-in EEPROM storage chip for later historical record query.

9. Advantage Highlights

1. Exclusive matching UNISAB III original system protocol without third-party protocol converter, zero communication data loss during long-term continuous data transmission
2. Wide temperature grade industrial component whole-unit configuration, adapt to high-low temperature alternating refrigeration plant workshop harsh working environment without display failure or parameter drift
3. Three-level password permission management effectively avoid misoperation caused by irrelevant personnel random adjustment of refrigeration unit control parameters, reduce equipment abnormal shutdown risk
4. Embedded panel installation structure save onsite control cabinet inner space, compatible with standard refrigeration control cabinet pre-set opening size of mainstream Sabroe refrigeration unit
5. Built-in complete surge, overvoltage and reverse power connection protection circuit, effectively resist power grid instantaneous voltage fluctuation and wrong wiring damage of internal core components
6. Unified factory traceable component configuration, spare parts can be directly matched with full series UNISAB III system original accessories for rapid field maintenance replacement

10. Applicable Industries

1. Industrial Refrigeration Industry: Large cold storage central refrigeration unit control room onsite operation monitoring, food processing factory freezing/chilling compressor set local operation control, cold chain logistics central chiller system parameter management
2. Petrochemical Industry: Petrochemical factory process cooling screw compressor local HMI operation, circulating chilled water unit parameter onsite monitoring and fault confirmation
3. Beverage & Brewery Industry: Brewery fermentation tank cooling reciprocating compressor group onsite start-stop control and operating data real-time viewing
4. Marine Refrigeration Industry: Large cargo ship onboard refrigeration storage unit local operation terminal for cabin refrigeration compressor parameter adjustment
5. Central Air Conditioning Industry: Large commercial building centralized water chilling unit UNISAB III control system onsite operation display terminal matching

11. Model Series Classification

• Parent System Series: Johnson Controls UNISAB III Full Set Refrigeration Central Control System
• Same Derivative Model Branch of 4214 Product Series:
  1. 4214-002: Extended version with extra analog auxiliary parameter display channel for multi-chiller combined unit
  2. 4214-003: Explosion-proof grade customized model for petrochemical flammable environment refrigeration equipment
  3. 4214-004: Marine anti-corrosion coated variant dedicated for shipboard refrigeration system installation
• Matching Supporting Core Controller Model: UNISAB III Main Control CPU Module Model 4210-001

12. Installation Requirements

1. Panel Embedded Mounting Requirement: Reserve fixed 196mm×122mm rectangular opening on control cabinet front panel; insert unit from cabinet front side, fasten left-right fixed buckle from cabinet inner side to lock the whole unit tightly without looseness during long-term equipment vibration.
2. Wiring Specification Requirement: Use 0.75mm²~1.5mm² stranded copper insulated wire for DC24V power and RS485 bus wiring; strictly separate power wiring and signal wiring routing with more than 30mm spacing to avoid electromagnetic crosstalk interference.
3. Ambient Installation Environment Requirement: Install position keeps away from compressor high-temperature exhaust air outlet, direct water splash area and strong electromagnetic equipment (large contactor, high-power frequency converter); surrounding environment maintain non-condensation fixed humidity range.
4. Grounding Standard Requirement: Connect equipment rear reserved grounding terminal to control cabinet unified protective grounding copper bar with 1.5mm² yellow-green ground wire, grounding resistance ≤4Ω per industrial electrical standard.
5. Bus Networking Wiring Requirement: RS485 bus wiring adopts daisy-chain sequential wiring mode, prohibit star-type parallel wiring layout; install terminal matching resistance at the last equipment of whole bus tail end.

13. Usage Precautions

1. Startup Preheating Specification: Complete continuous 15 minutes power-on preheating after equipment power input before formal onsite operation, wait internal circuit temperature stabilize to guarantee display numerical value meet factory calibrated precision standard.
2. Panel Daily Protection Regulation: Keep front LCD protective cover intact all the time, prohibit sharp hard object scratch screen surface and keypad silicone cap; wipe panel dust only with dry soft cotton cloth after cutting off unit input power.
3. Prohibited Disassembly Regulation: No disassembly of unit sealed rear enclosure without official Johnson Controls authorized maintenance technician; internal circuit components are sensitive to dust, static electricity and mechanical impact damage.
4. Long-Term Idle Storage Regulation: When equipment is out of service for more than 30 days, remove unit from control cabinet, place into original moisture-proof packaging carton under 10℃~35℃ dry indoor environment, avoid low-temperature frost and high-humidity mildew corrosion of internal PCB board.
5. Power Cut Operation Specification: Cut off upper-level circuit breaker power supply before all wiring modification or internal inspection work; prohibit live plugging of rear terminal wiring to prevent instantaneous short-circuit burnout of core control chip.
6. Periodic Maintenance Regulation: Complete full function inspection and communication parameter recalibration every 24 months per factory maintenance specification; replace aging sealing rubber strip and worn keypad accessories with original factory certified spare parts only.