For 2-wire proximity sensors
A purpose-specific AC input model for proximity-sensor and similar field signals.
SLI120CRP
AC input, DC load — 50 mA signal relay
Nominal input
120 V AC
Load voltage
24 V DC
Load current
50 mA
Warranty
10 years
MTTF
19,4 years
33,28 €
Manufacturer's recommended price. Delivery terms: EXW Nummela, Finland.
10-year warranty
ISO 9001:2015
Technical specifications
Main data
| Nominal input voltage | 120 V AC |
|---|---|
| Nominal load voltage | 24 V DC |
| Rated load current | 50 mA |
| Contact type | N/O, solid state |
| Coil type | AC |
| Load circuit | DC |
| EAN / GTIN | 6410027190716 |
| Application | Used with 2-wire proximity sensors |
Why choose SLI120CRP
Designed for difficult industrial input signals
Use SLI120CRP when a nominal 120 VAC field signal must be transferred reliably to a PLC or DCS input. Its signal-side hysteresis, specified 80 nF cable-capacitance capability and pulse-transformer isolation help prevent interference and long field wiring from becoming unintended switching commands.
80 / 60 VAC thresholds
Separate turn-on and turn-off levels provide defined switching behaviour.
80 nF cable capacitance
A published input-side value for applications with capacitive field wiring.
Only 1 µA output leakage
A clearly specified low off-state current on the PLC-input side.
Application guidance
Use it where its input characteristics matter
Suitable applications
- Nominal 120 VAC 2-wire proximity-sensor signals
- 100–125 VAC field signals connected to PLC or DCS inputs
- Long or capacitive field wiring within the published 80 nF limit
- Industrial panels requiring galvanic field/controller isolation
Check before selection
- Confirm the actual field voltage against the 80 VAC turn-on and 60 VAC turn-off thresholds.
- Maximum load-side current is 50 mA; the output is intended for PLC inputs and similar low-current loads.
- If switching an inductive load, install a clamp diode across the load as required by the datasheet.
- Follow the datasheet guidance for cooling, bank mounting, thermal derating and fuse selection.
Delcon design advantage: the field signal crosses a pulse-transformer isolation barrier instead of an optocoupler. This provides 4,600 VAC RMS / 1 s test isolation and avoids taking switching energy from the PLC-input load circuit. See how the technology works →
Select by field voltage
Compare nearby Delcon input relays
Choose the relay from the real field-signal voltage and application. These models are not interchangeable without verifying the complete circuit.
SLI120CRP
Nominal 120 VAC proximity-sensor input, 80 / 60 VAC switching thresholds and 80 nF cable-capacitance specification.
Other input voltages
Use SLI24CR for nominal 24 VAC signals or SLI230CRP for nominal 240 VAC proximity-sensor signals. Confirm all thresholds and wiring from the selected model’s datasheet.
Complete the assembly
Sockets, mounting and nearby alternatives
MIS1GNDIN-rail input-relay socket, screw terminalsMIS1CCNDIN-rail input-relay socket, spring terminalsSLI24CR24 VAC field-input interface relaySLI230CRP240 VAC proximity-sensor input relayMBS16BIOP16-channel PLC Fast Connect mounting base
For multi-channel installations, Delcon PLC Fast Connect™ mounting bases, cables and PLC adapters reduce point-to-point wiring. Delcon can also design custom cables or adapters for other PLC, DCS and remote-I/O systems.
Engineering resources
Datasheet and 3D model
Frequently asked questions
SLI120CRP selection basics
What does SLI120CRP connect?
It accepts a nominal 120 VAC field signal, including signals from suitable 2-wire proximity sensors, and provides a solid-state DC output intended for PLC inputs and similar low-current loads.
Why are the 80 / 60 VAC switching thresholds important?
The relay turns on at 80 VAC and turns off at 60 VAC. The separate thresholds provide defined hysteresis and help prevent an unstable state near the switching point.
What does the 80 nF cable-capacitance value mean?
It is the published input-side cable-capacitance capability for this model. The complete circuit, sensor and field wiring must still be checked against the datasheet values.
Which socket should be used?
Use MIS1GN for screw terminals or MIS1CCN for spring terminals. For multi-channel wiring, compare Delcon PLC Fast Connect™ mounting bases and cables.
✓ Sources: Delcon SLI120CRP product data and model datasheet · Draft review date: 7 October 2026
Confirm SLI120CRP against your sensor and PLC input.
Send Delcon the field voltage, sensor type, cable length or capacitance, PLC input data and ambient conditions.