Siemens RLE162 Synco100 Immersion Temperature Controller

All-in-one immersion pipe regolatore di temperatura (sensore + controllore + local operator panel integrated), member of the RL…100 series. Designed for modulating HVAC hydronic systems with DC 0~10V analogue output.

Codice ordine: BPZ:RLE162

✅ Primary Applications

Hot/chilled water systems, heating circuits, heat exchangers, water-side control for air handling units, domestic hot water temperature regulation and temperature limit protection. Supports Heating / Cooling modes. Can be fitted with an outdoor temperature sensor (QAC22, LG-Ni1000) for weather compensation, remote setpoint switching, and optional legionella disinfection function.

✅ Key Technical Specifications

Alimentazione elettrica: AC24V, 50/60Hz, Consumo energetico: 2 VA

Control Algorithm: P / PI selectable

Setpoint Range: -10 ~ +130 ℃, setpoint offset 0~60 K

Built-in Sensor: Immersion probe, insertion length 130 mm, PN10; threaded fitting AQE2102 included with delivery

Analogue Outputs: 2 independent DC 0…10V (1mA) for modulating actuators (SQX, SKB, SKD series)

Uscita digitale: 1 potential-free normally open relay, AC24~230V, 2UN (for circulating pumps, allarmi, tifosi)

Ingressi: LG-Ni1000 temperature sensor + potential-free dry contact (external switchover for setpoint / eco mode)

Classe di protezione: IP65, direct pipe mounting without control cabinet

Dimensioni complessive: 125 × 152 × 78 mm

Temperatura operativa ambientale: Massimo. 50 ℃ (surrounding environment)

✅ Funzioni principali

1. Constant temperature control + alto / low temperature cut-off protection
2. Outdoor air temperature compensation (weather-dependent supply temperature reset)
3. External contact for setpoint switching (ECO energy saving / time programme)
4. Optional legionella high-temperature disinfection
5. Service test mode, fully configured via DIP switches
6. Local knob setpoint adjustment; standalone operation without bus communication (not a DDC)

✅ Series Selection Table (RL…100 Range)

RLE162: Immersion type, dual DC 0~10V modulating outputs (questo modello)

RLE132: Immersion type, 3-point floating switch output (for 3-position electric valves)

RLM162: Duct-mounted temperature controller with dual 0~10V outputs

RLA162: Wall-mounted room thermostat with dual 0~10V outputs

RLA162.1: Same as RLA162, with setpoint lockout (for hotel guest rooms & office anti-overheating)

Common features across the RL…100 family:

Alimentazione AC24V, built-in LG-Ni1000 sensor, local knob setting, no LCD display, DIP switch configuration, stand-alone only (no bus), IP65 for RLE/RLM, IP30 for RLA.

RLE162 / RLE132 / RWD68 Full Comparison

Riepilogo veloce:

RLE162: All-in-one pipe-mounted, dual 0~10V continuous modulation

RLE132: All-in-one pipe-mounted, 3-point floating switch output

RWD68: DIN rail cabinet-mounted standalone controller, single 0~10V analogue output

Main Comparison Table

Guida alla selezione delle applicazioni

✅ Choose RLE162 if you need:

Dual modulating valves (primary heating valve + secondary mixing valve, riscaldamento + cooling split range control)

Domestic hot water with legionella disinfection

On-pipe installation without cabinet wiring

Weather-compensated supply temperature control for plate heat exchangers

✅ Choose RLE132 if you only need 3-position floating electric valves (on/off/open-close), no continuous 0~10V regulation.

✅ Choose RWD68 if:

You require visible LCD parameters, pressure/humidity monitoring, or only a single analogue output

Controller will be installed inside a control cabinet

❌ Not suitable for RLE162:

Single-valve only applications (use RWD68 for lower cost)

3-position floating valve control (select RLE132)

Pressione, differential pressure or humidity measurement (use RWD68)

BMS/BA network communication (requires full DDC controller)

Duct or room temperature control (RLM162 / RLA162)

Typical Application List

1. Domestic hot water storage tank with legionella disinfection (alberghi, ospedali, dormitories) ✔
2. Plate heat exchanger secondary supply temperature with weather compensation + dual valve control ✔
3. AHU heating & cooling coil split-range modulation (heat valve + cold valve) ✔
4. Chilled water secondary circuit constant temperature + low-temperature anti-freeze protection ✔
5. High-temperature mixing circuits for underfloor heating ✔
6. Local retrofit projects on building heat metering branches ✔

Full RL…100 Series Model List (All-in-One Local Controllers, RLE162’s Family)

1) Immersion Pipe Type (RLE series, built-in immersion probe, IP65)

2) Duct Mount Type (RLM series, built-in air duct sensor)

3) Wall-mounted Room Type (RLA series, indoor temperature control)

Series Unified Specifications

AC24V power, built-in LG-Ni1000 temperature sensor, local rotary knob setpoint, no LCD display, DIP switch programming, stand-alone operation without field bus, IP65 (RLE/RLM), IP30 (RLA).

RWD Series (Cabinet DIN-Rail Controllers, Not Part of RL…100 Series)

RWD62 / RWD68 / RWD82 are DIN rail mount controllers without built-in sensors; external temperature probes must be wired separately. Do not mix them up with the RLE/RLA/RLM all-in-one range.

Regola di denominazione del modello (RL…100 Series)

1. Prefix Letter:

RLE = Immersion (pipe immersion mounting)

RLM = Duct (air duct mounting)

RLA = Room (indoor wall mounting)

2. Numerical Suffix:

127: 2-interruttore di posizione + differential temperature control

132: 3-point floating switch output

162: Dual DC 0~10V continuous analogue outputs (top configuration in this series)

Interruzione & Opzioni di sostituzione

1. RLE162, RLE132, RLE127, RLM162, RLA162 are legacy Synco100 products, production is gradually reduced, only stock available.
2. Replacement solutions:

Keep original pipe-mounted all-in-one design: Continue purchasing stock of the same model.

Migrate to cabinet centralized control: Use RWD68 + QAE21 immersion temperature sensor (only single 0~10V output; dual-AO capability is lost).

Typical Wiring Logic

Alimentazione elettrica: AC24V

AO1 / AO2 → 0~10V modulating electric control valves

Relay DO → Circulating pump / allarme guasto

External Ni1000 (QAC22) → Outdoor temperature compensation

Dry contact DI → Time switch / eco setpoint switchover

Guida alla risoluzione dei problemi

1. Nessuna uscita: Check AC24V power supply; confirm DIP switch mode matches heating/cooling setting.
2. Incorrect temperature reading: Check probe fouling and installation location (install in steady flow area, avoid turbulent zones).
3. Actuator fails to move: Measure DC 0~10V signal to isolate controller fault vs actuator fault.
4. Relay not pulling in: Corrente di sovraccarico (>2UN) or loose terminal wiring.