MKI M2A-XL Stand Alone Transmitter
002757-HW-RKI-057
Overview
The RKI M2A-XL is a state-of-the-art transmitter that can operate as an independent, stand-alone monitor or as part of an integrated system. The M2A-XL connects with an analog or digital signal to virtually any controller, PLC, or DCS. Setup procedures are simplified with user friendly push buttons and OLED menus. It utilizes a magnetic wand technique for performing non-intrusive calibration. The M2A-XL provides an automatic zero drift correction feature, which results in more stable readings and reduces the need for adjustments due to sensor aging.
| e | 2 to 3 years with normal service | 5 years plus with normal service | ||||
| Accuracy (which ever is greater) | ± 5% of reading or ± 2% LEL | ± 0.5% Vol. O2 | ± 5% of reading or ± 2 ppm H2S | |||
| Weather Resistant | Patented water repellent sensor coating | |||||
| Alarms | ||||||
| Alarm Settings | Two fully programmable alarm set points, increasing / decreasing, latching / self-resetting, on delays, off delays, normally energized or de-energized | |||||
| Alarm Indication | Visual LEDs. Alarm 1, Amber; Alarm 2, Red; Fail, Red | |||||
| Relays | 5 amp form ‘C’ contacts for alarm 1, alarm 2, and fail | |||||
| Physical | ||||||
| Dimensions | Height: 6.2” (158 mm), Width: 5.66” (144 mm), Depth: 4.86” (124 mm) | |||||
| Display | Alphanumeric OLED display. 8 characters per line; 2 lines for gas concentration readout, plus user-friendly calibration and setup | |||||
| Enclosure | Explosion proof for Class I, Div 1, Groups B, C, D. | |||||
| Enclosure Rating | NEMA 4X, explosion proof, watertight, cast aluminum with o-ring seal and epoxy powder coating | |||||
| Controls | Magnet used for calibration functions. Calibrates without opening the housing. Internal push-button controls also available for calibration and setup | |||||
| Operating Environment | ||||||
| Operating Temperature | -40°F to 167°F
-40°C to 75°C | -4°F to 122°F
-20°C to 50°C | -40°F to 122°F
-40°C to 50°C | |||
| Relative Humidity | 5 – 95% RH non-condensing | |||||
| Location | Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, D. | |||||
| Operating Voltage | 10 VDC – 30 VDC | |||||
| Outputs | ||||||
| Analog | Linear 4-20 mA signal, into 1000 ohms impedance max (24DC), 0 – 500 ohms max (12VDC) corresponding to 0 – full scale | |||||
| Digital | Modbus RTU output standard, fully configurable, 2-wire RS-485, 1200 to 19.2k baud | |||||
| Approvals | 65-2640XL UL | 65-2641XL
UL | C CSA US | |||
| 65-2640XL-05 C CSA US | 65-2641XL-05 C CSA US | |||||
| Controllers | Beacon 110, Beacon 200, Beacon 410A, Beacon 800, Beacon 3200 as well as most DCS / PLC systems | |||||
| Warranty | One year material and workmanship | |||||
The housing of the M2A-XL does not need to be opened for zeroing or calibration, making it unnecessary to declassify the area for routine maintenance. It is designed so that a complete field calibration can be performed by one person. Sensor construction is rated Class I, Div. 1 Groups B, C, D for flammables, CO, H2S, O2, and CO2, and Class I, Div. 2 for all other toxics.
The transmitter provides a 4-20 mA output in addition to a Modbus digital output. It also has two levels of alarms with relays, plus a fail alarm with relay. A digital display of the gas concentration, as well as alarm and status lights, can be viewed through the front window.