Specifications are subject to change without notice (25.06.99) 1
• Range: 20 m
• Modulated, infrared light
• Positive safety, NF P25-362 standard
• Make switching function
• LED-indication for power supply ON (emitter)
and target detected (receiver)
• Supply voltage: 24 VDC and 24 VAC
• 25 x 65 x 81 mm PC housing, IP 67
• 2 x relay output (connected in series)
• NO output
Photoelectrics
Type PMT 20RS, Through-beam
Special Function
Ordering Key
Type
Relay output
Safety
Through-beam photoelectric
switch. Range up to 20 m.
Immune to ambient light. Pre-
cise detection through narrow
beam. LED-indication. Relay
output (NO). 2 relays in series
for safety applications. Pro-
tection degree IP67. Screw
terminal connection. 25 x 65
x 81 mm plastic housing. PG
13.5 cable gland.
Product Description
Type Selection
Housing Range Ordering no. Ordering no.
W x H x D (mm) (Sn) Receiver Emitter
25 x 65 x 81
PG 13.5 cable gland 20 m PMT 20 RS PMT 20 GS
Specifications Receiver
Rated operational volt. (UB) 24 VDC ±20%
AC: 50 to 60 Hz 24 VAC ±20%
Rated operational power ≤2 W (2.5 VA)
Light source GaAIAs LED, 880 nm
Light type infrared, modulated
Optical angle ±2°
Indication
Power supply ON LED, green
Rated operational volt. (UB) 24 VDC ±20%
AC: 50 to 60 Hz 24 VAC ±20%
Rated operational power
(Relay ON) ≤2 W (2.5 VA)
Output
Contact ratings (AgCdO) µ (micro gap)
Resistive loads AC 1 3 A/50 VAC
DC 1 3 A/30 VDC
Small inductive loads AC 15 2 A/50 VAC
DC 13 3 A/30 VDC
Mechanical life ≥2 x 107operations
Electrical life ≥1 x 105operations
at 220 VAC - 3 A resistive
load: 360 impulses/h
Dielectric voltage
2 kVAC (rms) (cont./supply)
Optical angle ±2°
Rated operating distance (Sn)
(0 to 5000 lux) 20 m
Operating frequency 20 Hz
Response time
OFF-ON ( tON )≤20 ms
ON-OFF ( tOFF )≤30 ms
Power ON delay (tv)≤300 ms (typ. 100 ms)
Output function Make switching
Indication
Target detected (make swit.) LED, yellow
Specifications Emitter
PMT20 R S
2Specifications are subject to change without notice (25.06.99)
General Specification
PMT 20RS
Environment
Installation category III (IEC 60664/60664A,
60947-1)
Pollution degree 3 (IEC 60664/60664A,
60947-1)
Degree of protection IP 67 (IEC 60529, 60947-1)
Temperature
Operating -25° to +55°C (-13° to +131°F)
Storage -30° to +80°C (-22° to +176°F)
Vibration 10 to 150 Hz, 0.5 mm/7.5 g
(IEC 60068-2-6)
Shock 2 x 1 m & 100 x 0.5 m
(IEC 60068-2-32)
Rated insulation voltage 250 V (IEC 60364-4-41)
Housing material
Body PC, grey
Front SAN, black
Cover PC, black
Cable gland PA, black, reinforced
Mounting bracket Steel, black
Connection
Screw terminal 5 x 2 x 1 mm2
Cable gland PG 13.5
Weight
Emitter 110 g
Receiver 115 g
CE-marking Yes
Load Active Non-
active
Truth Table
Object present Yes No
LED OFF ON
Make switching
Connection Diagram
24 VDC or 24 VAC, 50/60 Hz
30 VDC or 50 VAC. Max. 3 A
LED
Pins 1 - 2 Power supply
Pins 3 - 4 Relay output
Pins 5 Test output
Accessories
•MB02 (longer mounting bracket).
Please refer to "Accessories".
Delivery Contents
•Photoelectric switch: PMT 20.S
•Cable gland
•Installation instruction
•Mounting bracket
•Packaging: Corrugated cardboard
(environmentally friendly recycling material)
Mode of Operation - Receiver
The received signal is ampli-
fied by the amplifier (1), and
the modulated impulses are
synchronized and detected in
the pulse detector (2).
The modulated impulses are
then recognized in the demo-
dulator (3).
The output signal from the
demodulator controls 2 relays
(4 and 5) which are connec-
ted in the manner prescribed
by the NF P25-362 standard.
The centre of the two relay
contacts is available as a
checkpoint for checking each
contact individually.
Specifications are subject to change without notice (25.06.99) 3
PMT 20RS
Block Diagram - Receiver
Operation Diagram
Dimensions
PMT 20.S Angle bracket for PMT 20.S
or 1/2" NPT
12 5
4
3
Target present
Object present
Output ON
tv = Power ON delay
Power supply
