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Installation Instructions

Original Instructions

Minotaur MSR117T Safety Relay

Catalog Numbers 440R, 440R-B23211

Summary of Changes

This publication contains the following new or updated information. This list 
includes substantive updates only and is not intended to reflect all changes. 

Introduction

This device is intended to be part of the safety-related control system of a 
machine.

Rockwell Automation does not accept responsibility for failure of this device if you 
do not implement the procedures that are given in this publication, or if you use 
the unit outside the recommended specifications that are listed in this publication.

Description

The unit can connect to safety gate switches or E-stop buttons and requires a 
supply voltage that is applied via the safety device to operate this safety relay. 
There are three N.O. safety outputs, plus one N.C. auxiliary for control indication. 

If the input switch is closed and the supply is on A1-A2, the MSR117T safety relay is 
ready for operation and the PWR status indicator is on. The MSR117T safety relay 
can now be activated via the reset (feedback loop) circuit X1-X2. The safety 
contacts 13-14 and 23-24 and 33-34 close and enable operation, signalized by the 
second status indicator.

One N.C. contact respectively of the connected contactors or expanders has to be 
wired in series into the feedback circuit X1-X2 and is used for monitoring contactor 
function so that MSR117T safety relay start is feasible only if the contactors are at 
rest and their N.C. contacts are closed. If X1-X2 is closed at the time when voltage 
is supplied at A1-A2, the unit performs an automatic reset.

Specification

Topic

Page

Updated Declaration of Conformity

3

IMPORTANT

Before installation, perform a risk assessment to determine 
whether the specifications of this device are suitable for all 
foreseeable operational and environmental characteristics 
of the machine to which it is to be fitted. At regular 
intervals during the life of the machine, check whether the 
characteristics foreseen remain valid.

WARNING: 

Danger of serious injuries. Misuse can result in 

malfunction.
• Only authorized and trained personnel can start up, assemble, 

or retrofit the device.

• Installation must be in accordance with the following steps.

WARNING: 

Danger of serious injuries. 

Incorrect installation or manipulation can result in serious 
injuries. Do not defeat, tamper, remove, or bypass this unit.

ATTENTION: 

If any malfunction or damage is present, do not 

attempt to repair. Replaced the unit before machine operation 
is allowed. Do not dismantle the unit.

IMPORTANT

The safety inputs of these products are described as 
normally closed (N.C.), that is, with the guard closed, the 
actuator in place (where relevant), and the machine able to 
start. You must prevent exposure to shock and/or vibration 
in excess of those specifications in IEC 60068 part: 2-6/7. 
Adherence to the recommended inspection and 
maintenance instructions forms part of the warranty.

IMPORTANT

All information complies with the state of this publication 
and is subject to change without notice.

Attribute

Value

Functional safety data

According to ISO 13849-1:
• PLe,  Cat.  4
• MTTF

d

 [a]: 432

• DC average: 97%

According to IEC 62061 and IEC 61508:
• SIL CL 3 
• PFH [1/h]: 2451E-10
• HFT:  1
• DC:  97%

• TM  (PTI)  [a]:  20
• dop [d]/hop [h] 

(1)

: 365/24

• tcycle [h]/[s] 

(2)

: 8/28,800

Power supply

24V AC/DC
0.85...1.1 x rated voltage 50/60 Hz

Power consumption

2 W

Safety inputs

1 N.C.

Input simultaneity

Infinite

Allowable input resistance, 
max

25 Ω

Reset

Manual monitored or automatic/manual

Outputs

3 N.O. safety, 1 N.C. auxiliary

Output rating

• UL: 3 x C300 or 2 x B 300, R300

3 x 4 A or 2 x 5 A

• AC-15:  5  A/250V  AC
• DC-13:  3  A/24V  DC

Fuses output (external)

6 A slow blow or 10 A quick blow

Switched current/voltage, 
min

10 mA/10V

Contact material

AgSnO

2

 + 0.5µAu

Electrical life (operations)

• 100,000 (220V AC/4 A/880VA cos

φ

 = 0.35)

• 500,000 (220V AC/1.7 A/375VA cos

φ

 = 0.6)

• 1,000,000 (30V DC/2 A/60 W)
• 2,000,000 (10V DC/0.01 A/0.1 W)

Mechanical life

10,000,000 cycles

Power on delay

110 s

Response time

30 ms

Impulse withstand voltage

2500V

Pollution degree

2

Installation group

Overvoltage category III, VDE 0110-1

Operating temperature

-5…+55 °C (23…131 °F)

Relative humidity

90% 

Enclosure protection rating

IP40 (NEMA 1)

Terminal protection rating

IP20

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