445120640 - OMRON AUTOMATION & SAFETY

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Safety Monitoring Relays

SR101A

Single-Channel Safety Monitoring Relay

• Power requirements—the SR101A will accept 24 VAC/DC or 115 VAC

• Inputs—a single N/C input channel, not monitored, is provided

• Outputs—the SR101A has two N/O outputs to route power to the coils of power

contactors

• External Device Monitoring (EDM) is provided with a N/C loop between S11

and S21 on the SR101A

• Reset mode—an automatic reset mode is provided with the SR101A

C US

Speciﬁcations

Electrical All Models SR101A01 SR101A02

Power Supply: ±10%, 50-60 Hz 24 VAC/DC 115 VAC

Power Consumption: Approx. 1 VA

Safety Inputs: 1 N/C (not monitored)

Outputs: 2 N/O

Output Rating AC: Inductive AC-15, 4 A/230 V

Output Rating DC: Inductive DC-13, 2 A/24 V

Min Switched Current/Voltage: 20 mA/24 V

Impulse Withstand Voltage: 2500 V

Max Drop-Out Time: 75 ms

Max Output Fuse: 6 A quick-acting fuse or 4 A slow-acting

Reset Mode: Automatic (S11-S21)

Contactor Monitoring: N/C loop S11-S21

Mechanical

Mounting: 35 mm (1.38 in.) DIN rail

Case Material: Fiber-ﬁlled Polyamide PA6.6

Max Wire Size: 1 x 2.5 mm (14 AWG) stranded

Weight: 230 g (8.1 oz.)

Color: Red

External Switches: None

Indication: Green = K1 Closed, Green = K2 Closed

Mechanical Life: 1 x 10 7 operations

Environmental

Enclosure Protection: IP20 terminals, IP40 (NEMA 1) housing

Operating Temperature: 24 VAC/DC: -15 to 60°C (5 to 140°F)

115 VAC: -15 to 40°C (-5 to 104°F)

Humidity: 93% RH at 104°C (219°F)

Compliance

Standards: EN60439-1, EN60947-1/5/7, EN61000-6, EN62061, EN ISO 13849-1

Approvals/Listings: CE marked for all applicable directives, UL and C-UL, TÜV Rheinland

Speciﬁcations are subject to change without notice.

Note:

The safety contacts of the 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.

Conforms to EN60439-1, EN60947-1/5/7,

EN61000-6, EN62061, EN ISO 13849-1

UL and C-UL listed

TÜV Rheinland approved

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Output Contact

Arrangements

Terminal Connections

Application

SR101A

SUPPLY

SAFETY

OUTPUT 1

N/O

SAFETY

OUTPUT 2

N/O

S21

S11

EDM AND

RESET

Terminal Pin Assignments

24 VAC/DC, 110 VAC

BLUE

BROWN

MA SERIES

INTERLOCK

SWITCH

K2K1

K1 (AUX)

K2 (AUX)

START

MOMENTARY

PUSH

BUTTON

STOP

MOMENTARY

PUSH

BUTTON

FUSE

L1 L2 L3

L1 L2

CONTACT PROTECTION e.g. THERMAL CUT OUT

EB SERIES

LATCHING

E-STOP

BUTTON

Relay control and

fault monitoring

Power supply

(S11 = 24 V)

A1 S11 S21 13 23

14 24

SR101A

GUARD

CLOSED

FUSE FUSE

S11 A1

14 13

24 23

A2 S21

SR101A Safety Monitoring Relays

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Ordering

Model Supply Inputs Outputs Part No.

SR101A01 24 VAC/DC 1 N/C 2 N/O 44510-1011

SR101A02 115 VAC 1 N/C 2 N/O 44510-1012

Dimensions (mm/in.)

Block Diagram

SR101A

DIN RAIL MOUNTING

1.38

3.9

114

4.5

22.5

0.885

Relay control and

fault monitoring

Power supply

(S11=24V)

A2 14 24

A1 S11 S21

13 23

A1 A2

+UB0V

AC L1 N

SR101A Safety Monitoring Relays

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