Description
Eurotherm 2132i/AL/VH/ENG Process Indicator and Alarm Unit
Product Overview
The Eurotherm 2132i/AL/VH/ENG is a compact process indicator and alarm unit from the Eurotherm 2100i family. Unlike a conventional PID controller, the 2132i is primarily intended to display a measured process variable and provide configurable alarm functions. Eurotherm documentation describes the 2132i as a 1/32 DIN indicator capable of temperature and process measurement, with alarm functions suitable for applications such as furnace over-temperature interlocks.
The ordering code is significant here. AL identifies the indicating/alarm version rather than the indicator-only ND version; VH specifies the 85–264 VAC supply range; and ENG identifies the English manual option. Eurotherm’s ordering documentation shows that the remaining input and alarm characteristics are separately configurable, meaning the shortened 2132i/AL/VH/ENG identifier does not establish a particular thermocouple, RTD, input range, setpoint range, or detailed alarm assignment by itself.
For legacy furnace, oven, process-heating, and industrial temperature-monitoring equipment, the Eurotherm 2132i/AL/VH/ENG can serve as a compact panel-mounted indication and alarm device. It is not a replacement for a PLC CPU, DCS controller, or general-purpose analog input module. Its value is much more specific: local process indication combined with configurable alarm handling in a very small panel footprint.
Product Introduction
In older heating and process-control panels, a failed indicator can be more disruptive than its size suggests. The 2132i/AL/VH/ENG combines local process indication with alarm functionality in a 1/32 DIN package, while the VH suffix specifies the high-voltage AC supply version.
For a legacy temperature-monitoring replacement, match the complete original ordering code rather than ordering solely by “2132i.” Input type, alarm configuration, setpoint range, and optional I/O coding can materially affect interchangeability.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 2132i/AL/VH/ENG |
| Manufacturer | Eurotherm |
| Series | 2132i / 2100i |
| Product Type | Process Indicator and Alarm Unit |
| Function Code | AL — Indicating alarm unit |
| Supply Code | VH — 85–264 VAC |
| Manual Code | ENG — English |
| Form Factor | 1/32 DIN |
| Approx. Front Dimensions | 48 × 24 mm |
| Panel Cutout | Approximately 45 × 22.2 mm |
| Panel Depth | Approximately 103 mm |
| Display | 4-digit LED |
| Input Architecture | Universal process input |
| Supported Sensor Families | Thermocouples, Pt100 RTD, and factory-configured linear process inputs |
| Alarm Functions | High, low, deviation and related configurable alarm functions |
| Operating Temperature | 0 to +55°C |
| Front Protection | IP65 |
| Product Status | Discontinued |
The 2132i family supports nine internally stored thermocouple types and Pt100, while other input linearizations can be factory downloaded. The exact input configuration should therefore be checked against the original unit or its configuration documentation.
Major Features / Practical Advantages
1. Very compact 1/32 DIN installation
The 2132i is designed for applications where panel space is limited. Its approximately 48 × 24 mm front format allows process indication and alarm functionality to be incorporated without dedicating a larger controller cutout.
2132I/AL/VH/ENG
2. Universal temperature/process input
The instrument supports a broad range of temperature inputs, including multiple thermocouple types and Pt100. Eurotherm also documents factory-loaded linearization options for process inputs. This makes the family considerably more flexible than a single-purpose temperature display.
3. Alarm-oriented architecture
The AL configuration is important because this is not simply an indicator. Eurotherm documentation identifies configurable alarm functionality, including high, low, and deviation alarm operation. Alarm blocking during startup is also provided to prevent expected transient conditions from immediately generating unwanted operator alarms.
4. Wide AC supply range
The VH suffix specifies an 85–264 VAC supply. This allows the instrument to operate across a broad range of industrial AC control-panel supplies without requiring a separate low-voltage DC supply.
5. Local operator visibility
The LED display provides direct indication of the measured process variable. For furnace and process-heating equipment, that local indication remains useful even when the larger PLC/DCS supervisory layer is unavailable.
6. Relay and logic alarm options
The 2132i family can be ordered with alarm relay and logic I/O functions. The exact output assignment is part of the ordering configuration, so procurement should not assume every 2132i unit has the same number or type of outputs.
7. Suitable for legacy process equipment
Eurotherm classifies the 2132i among its discontinued products. That makes revision and configuration matching particularly important when sourcing replacement inventory. A visually identical unit with a different order-code suffix may not provide the same alarm or input configuration.
Related Products
- Eurotherm 2116i — Larger 1/16 DIN version of the 2100i indicator/alarm family, useful where additional panel space is available.
- Eurotherm 2108i — 1/8 DIN indicator and alarm unit for installations requiring a larger front-panel format.
- Eurotherm 2132i/ND — Indicator-only configuration without the alarm relay and logic I/O fitted.
- Eurotherm 2132i/AL/VL — Low-voltage supply variant using 20–29 VAC/DC rather than the VH high-voltage AC supply.
- Eurotherm 2132i/AL/VH — Same basic indicating/alarm platform with the VH supply configuration but without the ENG language suffix.
- Eurotherm 2408i — Larger Eurotherm indicator/alarm platform with additional panel functionality.
- Eurotherm 3204i — Later 1/4 DIN indicator/alarm family for applications requiring a larger display and expanded functionality.
- Eurotherm 3216i — 1/16 DIN indicator/process alarm product in the later 3200i family.
FAQ
What does 2132i/AL/VH/ENG mean?
The code breaks down as follows:
- 2132i — Eurotherm 1/32 DIN indicator
- AL — Indicating alarm unit
- VH — 85–264 VAC supply
- ENG — English manual
These meanings are documented in Eurotherm’s ordering-code information.
Is the 2132i/AL/VH/ENG a PID controller?
Not in the usual sense. The 2132i is an indicator and alarm unit. It is intended to display process measurements and implement alarm/interlock functions rather than serve as a general-purpose closed-loop PID controller. Eurotherm separately identifies its controller products within the broader 2000-series range.
What input sensor does this exact unit support?
The shortened order code does not establish the complete sensor configuration. The 2132i platform supports thermocouples, Pt100, and factory-configured linear inputs, but the exact input linearization and setpoint range should be verified from the complete original ordering information.
Can I hot-swap the 2132i?
No hot-swap assumption should be made. It is a panel-mounted instrument with mains-voltage supply and field sensor/alarm wiring. Isolate the supply and relevant process/interlock circuits before removing it.
Does it operate from 24 VDC?
Not this VH version. VH specifies 85–264 VAC. The 2132i family also has a VL configuration for 20–29 VAC/DC, but that is a different supply option.
What is the difference between AL and ND?
AL is the indicating/alarm-unit configuration with alarm functionality and associated I/O options. ND is the indicator-only version; Eurotherm’s documentation specifically states that ND units do not have the alarm relay or logic I/O fitted.
Is the 2132i still manufactured?
Eurotherm currently lists the 2132i under its discontinued products. For a replacement, condition and exact configuration become important procurement considerations.
Can I replace a 2132i/AL/VH/ENG with any 2132i?
No. The family has multiple supply, alarm, input, output, setpoint, language, and option codes. A replacement should match the complete original configuration. In particular, verify the input type, alarm output arrangement, supply voltage, and any factory-downloaded input linearization before approving the substitution.
Procurement Note
The Eurotherm 2132i/AL/VH/ENG is small, but procurement should not treat it as a generic temperature indicator. The AL, VH, and ENG portions of the order code describe real configuration differences. The absence of a longer suffix in the supplied part number also means that the exact sensor/input configuration cannot safely be inferred.
For New Surplus or refurbished inventory, inspect the front display, keypad, rear terminals, relay contacts, enclosure condition, and configuration markings. If the original unit is still available, record its complete ordering code and configured input type before replacement.
For a legacy furnace or process-heating system, also verify whether the 2132i’s alarm relay is part of an independent process interlock. Do not assume that replacing the indicator automatically reproduces the original safety or shutdown behavior. Alarm assignment, wiring, and external relay logic should be checked against the actual control schematic.
