Gas measuring, monitoring and warning controller based on state-of-the-art micro-technology for continuous monitoring of the ambient air to detect toxic and combustible gases, refrigerants or oxygen.
The Multi-Sensor-Controller is designed for the connection of max. three sensors, two of them may be different cartridges of the SC2 series via local bus and/or two of them analog sensors with 4-20 mA signal. The controller monitors the measured values and activates the alarm relays if the set alarm thresholds for pre-alarm and main alert are exceeded. In addition, the values are provided for direct connection to the BMS via an RS-485 interface and also as 4-20 mA output.
The SIL 2 compliant self-monitoring function in the MSC2 and in the connected Sensor Cartridge activates the fault message in case of an internal error as well as in case of a fault in the local bus communication (SC2) and/or at the 4-20 mA input / output current signals.
Other options such as LCD display, three-color status LED, buzzer, digital input for acknowledgment or test function, various communication protocols ensure proper adaptation to the wide range of applications in gas detection technology. For convenient commissioning the MSC2 can be pre-configured and parametrised with factory-set defaults.
APPLICATION
The MSC2 is designed for detection and warning of gases in many commercial and industrial applications.
| Electrical | |
| Power supply | 24 V DC ± 20 %, reverse-polarity protected 24 V AC ± 15 %, (only one SC2 connected) |
| Power consumption (24 V DC) – Control Board – per sensor (SC2 or MC2) – horn / warning light |
Max. 60 mA (1.5 VA), w/o sensor, w/o WAO Max. 85 mA (2.1 VA) Max. 40 mA (1.0 VA) |
| Alarm relays (3) | 240 V AC, 5 A, potential-free, contacts (SPDT) |
| Transistor output (2) | 24 V DC / 0.1 A (switching to plus) (only at 24 V DC power supply) |
| Digital input (2) | Potential-free |
| Analog input (2) | 4 – 20 mA overload and short-circuit proof, input resistance 200 |
| Analog output signal (1) | Proportional, overload and short-circuit proof, load 500 Ohm 4 – 20 mA = measuring range 3.0 < 4 mA = underrange > 20 – 21.2 mA = overrange 2.0 mA = fault |
| Output for local bus | 5 V DC, 250 mA max. Overload, short-circuit and reverse-polarity protected |
| Ambient conditions | |
| Temperature range | -25 °C to +60 °C (-13 °F to +140 °F) |
| Humidity range | 15 – 95 % RH not-condensing |
| Storage temperature | +5 °C to +40 °C (+41 °F to +104 °F) |
| Storage time | 6 months |
| Serial interface | |
| Local bus | 1-wire / 19200 Baud |
| Field bus | RS 485 / 19200 Baud |
| Tool bus | 2-wire / 19200 Baud |
| Physical | |
| Housing type C | Polycarbonate |
| Combustion | UL 94 V2 |
| Housing colour | RAL 7032 (light grey) |
| Dimension housing (W x H x D) | 130 x 130 x 75 mm (5.12 x 5.12 x 2.95 in.) |
| Weight | ca. 0.6 kg (1.32 lb.) |
| Protection class (delivery status*) | IP 65 |
| Installation | Wall mounting |
| Cable entry | Standard 6 x M20/25 |
| Wire connection: Local bus (SC2) Digital input, analog output Power supply, relays |
3-pin connectorb Screw-type terminal min. 0.25 mm2, max. 1.3 mm2(24 to 16 AWG) Screw-type terminal min. 0.25 mm2, max. 2.5 mm2 (24 to 10 AWG) |
| Directives | EMC directives 2014/30/EU Low voltage directive 2014/35/EU CE EN 61010-1:2010 Conformity to: EN 50271 IEC 61508-1-3 EN 60079-29-1 Option: ANSI/UL 61010-1 CAN/CSA-C22.2 No. 61010-1 |
| *If there are changes to the housing, it has to be re-evaluated. | |
• Internal function monitoring with integrated hardware watchdog
• Hardware and software according to SIL2 compliant development process
• Easy maintenance / calibration by replacing the sensor cartridge or via comfortable on-site calibration
• Modular technology (plug-in and exchangeable)
• Reverse polarity protected, overload and short-circuit proof
• Local bus connection for two Sensor Cartridges SC2 & two analog inputs 4-20 mA, e.g. MC2 series (max. 3 sensors)
• Three relays with SPDT contacts, potential-free max. 240 V AC, 5 A
• Two transistor outputs, 24 V DC, 0.1 A (plus switching)
• Serial RS 485 interface with protocol for DGC06, or Modbus protocol as an option
• Different types of housing with IP 65
• Two digital inputs
• LCD display (option)
• Warning buzzer and status LED for alarm, fault, operation and service (option)
• Reset button (option)
• Operating voltage 230 V AC with wide range input 100 to 240 V AC (option)
• UPS (option)
• Conformity to:
– EN 50271
– IEC/EN 61508-1-3
– EN 60079-29-1
• ANSI/UL 61010 1 & CAN/CSA-C22.2 No. 61010-1 (optional)
• Duct mounting kit (accessory): See datasheet SC2 / MC2
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