| Attribute | Value |
|---|---|
| Brand | MTL (Measurement Technology Ltd.) |
| Model | MTL 2212 3-Channel Switch Operated Relay |
| Fuse Note | Lift to replace 160mA fuse |
| Certifications | [EEx ia] IIC Baseefa No. EX 802206, BS 5501: Part 7:1977, EN50 020, IEC79-11 |
| Voltage & Current | Umax: 8.68V, Ik: 90mA |
| External Parameters | Cext: 5µF, Lext: 4.5mH |
| Temperature | Maximum ambient temperature: 60°C |
| Field Connections | Intrinsically safe for Cl I, Div.1, GP. A, B, C, and D; Cl II, Div.1, GP. E, F, and G; Cl III, Div.1 |
| VM | 250V R.M.S |
| VOC / ISC / CA / LA | VOC: 10.6V; ISC: 100mA; CA: 2.5µF; LA: 3.8mH |
| Supply | 24V DC or 120V AC or 240V AC, 5VA |
| Contact Rating | 200V AC, 10VA, 0.5A max resistive |
| Safety Approval | SAA.AUS EX 268/X.1981 [Ex ia] |
| Origin | Made in USA |
| Weight | 660 gm |
What is the MTL2212?
The MTL2212 is a three-channel, switch-controlled relay that is part of MTL’s 2200 Series. It’s designed to connect field switches, such as proximity detectors or limit switches, to control room systems in a safe and efficient way. Each of the three channels provides an independent field circuit to control its corresponding relay contact in the safe area, providing secure signal transmission and isolation.
Key Features of the MTL2212
Here’s why the MTL2212 excels in industrial use:
3 Isolated Channels: Control three independent field devices using one module.
Intrinsic Safety: Ideal for hazardous area installations (Zone 0, Zone 1).
DIN-Rail Mounting: Simple to install, remove, and service.
LED Indicators: Visual indication of input signal and relay status.
Wide Compatibility: Compatible with standard switch inputs, making integration easy.
Compact Form Factor: Reduces space in control cabinets and panels.
How Does It Work?
The MTL2212 is basically a signal interface between control systems and field switches. When a field switch is closed (activated), the associated relay in the safe area is powered. This enables safe transmission of switch status without subjecting the control room to possible field hazards.
All channels can be run independently. Channel 1 might be used to monitor a machine arm limit switch, Channel 2 to monitor a tank level sensor, and Channel 3 to monitor a valve position—all via the same compact unit.
Applications
The MTL2212 is generic and can be applied in many industries. Some of the applications are listed here:
Oil & Gas: Monitor pressure or flow switches in hazardous areas.
Chemical Processing: Regulate proximity sensors in Zone 1 areas.
Pharmaceuticals: Ensure safety conformity in batch process control.
Manufacturing: Transfer switch states to PLCs on automated assembly lines.
Utilities and Power: Integration into control panels for substation and power generation plants.
Why the MTL2212?
Reliability, simplicity, and safety—these are the key benefits of using the MTL2212:
Safety Compliance: Compliant for intrinsically safe use (ATEX, IECEx).
Simplified Wiring Complexity: Three devices in one module reduce space and wiring requirements.
Established Brand: MTL has been building signal conditioning and hazardous area products for decades.
Quick Diagnostics: Independent channel operation and LED indicators enable quick troubleshooting.
