The Sentry Sample Sequencer 6 Controller is a sophisticated device designed for sample stream switching in industrial applications, operating in both Batch and Continuous modes. It significantly reduces the number of analyzers required while maintaining equivalent data accuracy, making it a cost-effective solution for sample conditioning automation.
Function Description:
The core function of the Sample Sequencer 6 is to electronically switch up to eight sample streams, one at a time, to a shared analyzer. It then provides signals to recorders and remote data acquisition devices (DCS, recorder, etc.). This modular design allows for flexible configurations, supporting up to eight IO boards across multiple enclosures.
In Continuous mode, the sequencer is used with analyzers that continuously produce an analytical result. It manages the flow of samples to the analyzer and handles alarms by closing the active sample valve and opening the next in sequence until the alarm clears or a timeout occurs.
In Batch mode, it's designed for analyzers that take a sample "bite" (or batch), produce an analytical result, and then provide a contact signal output, typically within 1-20 minutes. In this mode, an alarm initiates a timeout timer, and if an end-of-batch indication isn't received or the alarm doesn't clear before the timer expires, the sequencer moves to the next sample valve.
The device features analog inputs to read 4-20 mA signals from up to two different analyzers, converting these signals into engineering units for display and outputting them for track and hold analog outputs. Analyzer alarm inputs, typically indicating a loss of sample flow or system failure, trigger digital alarm outputs and sequence changes. Calibration hold inputs allow for analyzer calibration, pausing the sequencing process. End-of-batch inputs are crucial for batch analyzers, signaling the completion of a sample analysis.
Track and hold outputs provide independent 4-20 mA signals for each sample point, enabling data acquisition for local or remote indication. Digital outputs (16 sinking outputs per I/O board) provide channel number indication and/or replicated analyzer alarms for remote data. The valve outputs, supplying 12 or 24VDC, are designed to operate Sentry Manifold Sample Valves, with provisions for other manifold valves using additional hardware like interposing relays.
For communication, the Sample Sequencer 6 is capable of connecting to a network for communication with a PC or dedicated terminal screen via a webpage, and it supports Modbus communication protocol.
Important Technical Specifications:
- Models: Standard (7-06362C/K), IO Extender 4 Point (7-06362D/P), IO Extender 8 Point (7-06362E/N), Touch Screen with Power Supply (7-06362M), Touch Screen without Power Supply (7-06362L).
- Samples/Analyzers: Supports 8 samples with 2 analyzers (Standard/Extender 8 Point), 4 samples with 1 analyzer (Extender 4 Point).
- AC Input Power:
- 24V: 0.52A/115VAC, 0.26A/230VAC, 0.21A/277VAC (50-60 Hz)
- 12V: 1.5A/115VAC, 0.9A/230VAC, 0.75A/277VAC (50-60 Hz)
- DC Power:
- 24V: 1.9A/24VDC (Standard)
- 12V: 3.8A/12VDC (Standard)
- 24V: 0.43A/24VDC (Touch Screen without Power Supply)
- Analyzer Inputs:
- Analog Inputs (AI): Two (2) 4-20mA (154.5 Ohm load) ±1% full scale (max) for Standard/Extender 8 Point. One (1) 4-20mA for Extender 4 Point.
- Digital Inputs (DI): 6 for end-of-analysis indication and system alarm (max 28VDC) for Standard/Extender 8 Point. 3 for Extender 4 Point.
- Outputs:
- Digital Outputs (DO): 16 for Standard/Extender 8 Point. 8 for Extender 4 Point.
- Analog Outputs (AO): 8 (4-20mA; 550 Ohm max load) ±1% full scale (max) for Standard/Extender 8 Point. 4 for Extender 4 Point.
- Solenoid Outputs (SOL Out): 8 (12VDC) handling up to 2A* for Standard/Extender 8 Point. 4 for Extender 4 Point. (*Solenoid voltage must match DC voltage).
- Resolution: AI: 5.37uA/LSB, AO: 5.306761 uA/LSB.
- User Interface: Wireless 802.11b/g/n, Ethernet (Standard). 10.1" Touchscreen (Touch Screen models).
- Enclosure: IP 66 (Standard), IP 65 (Touch Screen).
- Dimensions:
- Standard: 8.88" H x 12.36" W x 4.72" D (226 mm H x 314 mm W x 196 mm D).
- Touch Screen: 14.3" H x 11.81" W x 5" D (363 mm H x 300 mm W x 127 mm D).
- Mounting: Surface.
- Ambient Temperature:
- Standard: 23 to 113 deg F (-5 to 45 deg C), 5-95% Relative Humidity.
- Touch Screen: -20 to 70 deg C, 5-90% Relative Humidity.
- Shipping Weight: 5 lbs (2.3 kg) for Standard, 7.5 lbs (3.4 kg) for Touch Screen.
- Agency Approvals: CE, FCC, Intertek, RoHS (Approvals still pending for Standard). CE, UL (Touch Screen).
- Operating Altitude: 0–2000 m (0–6562 ft).
- Mains Supply Fluctuation: -10% and +10%.
- Transient Overvoltage: 1500 VAC.
- Pollution Degree: 2.
Usage Features:
- Modular Design: Utilizes dedicated IO boards, allowing for flexible expansion up to eight IO boards across multiple enclosures.
- Programmable Modes: Supports both Continuous and Batch modes of operation, adaptable to different analyzer types and process requirements.
- Track and Hold Outputs: Provides independent 4-20 mA outputs for each sample point, ensuring continuous data availability for remote systems even when the analyzer is switching streams.
- Digital Outputs for Point Indication: 16 sinking digital outputs per I/O board for clear indication of the sample being analyzed, replicated analyzer alarms, and point identification.
- Wireless Connectivity: Equipped with wireless connectivity (802.11b/g/n) for configuration via a laptop or tablet, accessing the embedded webpage. This allows for monitoring and configuration of the sequencer and wireless connection settings.
- Touch Screen Interface (Optional): Models with a 10.1" touchscreen provide a direct, intuitive interface for operation and configuration.
- Easy Configuration: The web panel and touchscreen interfaces offer straightforward configuration of IP parameters, web parameters, and startup parameters.
- Analyzer Compatibility: Designed to interface with various continuous analyzers, including Hach Series 5000, Orion 2117LL, 2117HL, 2118XP, 2111LL, 2111XP, and Thornton 2800Si Silica Analyzer.
- PLC Connection: Supports connection to PLCs requiring a contact closure for point identification.
- Sample Timer: Adjustable timeout timer for all samples in Batch mode.
- Flush State: During calibration, the sequencer enters a "Flush" state to prepare the sample line for the next sample.
Maintenance Features:
- Cleaning: Constructed of rugged materials that do not require extensive cleaning. External surfaces can be cleaned with a soft cloth and water.
- Disassembly: Provides clear steps for safe disassembly, including disconnecting all power, removing terminal blocks, disconnecting power supply cables, and replacing circuit boards or cables.
- Troubleshooting Guide: Includes a comprehensive guide for common issues such as incorrect analyzer values, calibration problems, and wiring issues, offering step-by-step remedies.
- Component List: A detailed list of all components and accessories with their Sentry P/N for easy identification and ordering of replacement parts.
- Customer Support: Sentry Equipment Corp offers comprehensive customer support, including installation, training, technical manuals, field service, and replacement parts. ProShield Services provide scheduled maintenance plans.
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