safety monitoring relays
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For the Latest Information
On the Internet: www.sti.com or www.omron.ca
OMRON SCIENTIFIC TECHNOLOGIES, INC.
USA Tel. 1/888/510-4357 Canada Tel. 1/866/986-6766
H45
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Specifications
Electrical All Models SR125SMS00 SR125SMS02 SRS125SMS03
Power Supply: ±10% 24 VDC 110 VAC 220 VAC
Power Consumption: ≤3.5 W ≤7 VA ≤7.5 VA
Internal Fuse: Electronic
Safety Inputs: Back EMF sensing between Z1 and Z2 and Z3
Maximum Motor Voltage: 500 VAC (0 to 60 Hz)
Detection Threshold: 0.01 V
Relay Outputs: 1 N/O + 1 N/C switched at preset detection threshold
Auxiliary Outputs: 2 solid state for signaling
Max Switched AC: Inductive AC-15, 1800 VA inrush, 180 VA maintained
Max Switched DC: Inductive DC-13, 1.2-1.5 A/24 V
Min Switched Current/Voltage: 10 mA/17 V (provided that the contact has never been used with higher loads)
Impulse Withstand Voltage: 4000 V
Max Drop-Out Time: n/a
Max Output Fuse: 4 A slow-acting or 6 A fast-acting
Reset Mode: n/a
Mechanical
Mounting: 35 mm (1.38 in.) DIN rail
Case Material: Polyamide PA6.6
Max Wire Size: 2 x 2.5 mm (14 AWG) stranded
Weight: AC: 600 g (21 oz.); DC: 500 g (18 oz.)
Color: Red with black body
External Adjustment: Motor speed preset via potentiometer
Indication: Green = Power On Green = Channel 1 activated,
Green = Channel 2 activated Green = CH1 + CH2 activated
Environmental
Enclosure Protection: IP20 terminals, IP40 (NEMA 1) housing
Operating Temperature: -10 to 55°C (14 to 131°F)
Compliance
Standards: EN1088, EN954-1, EN292, EN692, EN60204-1,
Approvals/Listings: CE-marked for all applicable directives, UL and C-UL, CSA, BG
Safety Category: Cat. 3 per EN954-1 (SR125SMS internal operation)
Specifications are subject to change without notice.
Note: The safety contacts of the Omron STI switches are described as normally closed (N/C)—i.e., with the guard closed, actuator in place, and the
machine able to be started.
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Ordering
Model Supply Inputs Outputs Auxiliary Part No.
SR125SMS00 24 VDC Back EMF Sensing 1 N/O + 1 N/C 2 Solid State 44510-1250
SR125SMS02 110 VAC Back EMF Sensing 1 N/O + 1 N/C 2 Solid State 44510-1252
SR125SMS03 230 VAC* Back EMF Sensing 1 N/O + 1 N/C 2 Solid State 44510-1253
*230 VAC units are available on special order. Minimum quantities may apply.
SR125SMS
