PANTRONISM-1520 / ISM-1525

ISM-152x

1-channel amplifier series with selectable light / dark mode and dual transmit level. The ISM-152x family adds configuration flexibility to Pantron's 1-channel DIN-rail amplifier platform. Both models use manual sensitivity adjustment, 24 V AC or DC operation, two selectable transmit levels, and selectable light / dark switching behaviour. The ISM-1520 uses a floating relay output and the ISM-1525 uses a floating semiconductor relay output.

Datasheet PDF Operating Guide PDF

Up to 70 m range24 VAC / VDCHigh / low transmit levelLight / dark selectable

Key Features

Detection range up to 70 m, depending on transmitter / receiver combination.
Sensitivity adjustable with front potentiometer.
Basic transmit level selectable between low and high.
Switching behaviour selectable between light and dark.
Floating distance switching output; relay on ISM-1520 and semiconductor relay on ISM-1525.
Pluggable screw-terminal connections and DIN-rail mounting.

Best Fit Applications

Installations where light / dark mode flexibility simplifies commissioning.
Long-range detection in dirty, misty, or washdown-heavy areas.
Conveyor, door, and object-detection duties where a standard DIN-rail amplifier is preferred.
Machine retrofits requiring a choice between relay and semiconductor relay outputs.

This page consolidates the grouped models shown together so the shared electrical and optical platform can be reviewed in one place.

Technical Specifications

Models	ISM-1520 / ISM-1525
Operating voltage	24 V AC ±10% / 2.4 VA or 24 V DC ±10% / 2.4 W
Operating basis	Modulated infrared light
Transmit frequency	4.0 kHz
Transmit power	Manual
Basic transmit level	Low / High
Switching behaviour	Light / Dark
Switching delay	—

ISM-1520 output	Relay, normally open
ISM-1520 rating	5 A / 230 V AC (24 V DC)
ISM-1525 output	Semiconductor relay, normally open
ISM-1525 rating	100 mA / 60 V AC (DC)
Reaction time	36 ms
Housing	Polyamide, light grey
Protection class	IP20 (EN 60529)
Connection / wire size	Plug with screw terminals / 0.2 ... 2.5 mm²
Operating temperature	-25 °C ... 50 °C
Dimensions	22.5 x 94 x 84 mm

Compatible Sensor Pairs and Maximum Through-Beam Range

Transmitter family	With receiver IRL-...	With receiver IR-...	Typical use note
IT-..., ITL-...	20 m	25 m	Standard transmitter families
IT-...HP, ITH-...	30 m	35 m	Extended range pairings
ITA-...	50 m	70 m	Longest stated range in the catalog

Maximum range values are listed for through-beam operation.

Ordering and Accessories

Switching output	Order code
Relay	ISM-1520/24V
Semiconductor relay	ISM-1525/24V

Accessory	Order code
Protective enclosure	PanBox 1x1
Power supply PSU-1000	PSU-1000S/95...265VAC

Configuration and Wiring Notes

The catalog identifies the factory default amplifier mode in white.
Selector positions shown on the catalog page map the high / low transmit level and light / dark switching options.
This family does not list test input, analog output, alarm output, or COM interface functions.

For full connection diagrams, mechanical drawings, and companion transmitter / receiver options, refer to the Pantron catalog PDF linked above.