Owner manual

8. Power Supply Requirements
24V dc +10%/-15% has to be supplied by a power supply that complies with IEC / EN 60204 and IEC / EN 61558-1.
Such a power supply meets the electrical safety requirements and maintains the minimum power of
20.4V dc during 20ms even in the event of voltage dips.
When using an approved Relay with an MC2 and the same power supply is utilised for all devices the
Relay will provide surge protection for the MC2. If a separate power supply is used for the MC2 then
extra protection will be required.
9. Approved Monitoring Relay Units
1. MC2 can only be used with the approved Relays, use of other devices not
listed is at the users own risk.
2. Only 24Vdc MSR Relays or MSR Relays configured for 24Vdc operation are
compatible with MC2.
9.1 Approved Monitoring Relay Unit List and maximum number
of series MC2s
Monitoring Relay Series Catalogue Part No. Maximum number of
MC2 units in series
24Vdc Supply Voltage
MSR Series -5% -10% -15%
MSR30RT/RTP 440R-N23197/440R-N23198 10 10 10
MSR 100 Series
MSR121RT 440R-J23102 8 - -
MSR123RT 440R-J23106 8 - -
MSR124RT 440R-G23110/440R-G23108/440R-G23107 10 10 10
MSR126T/R 440R-N23117/440R-N23123 10 10 10
MSR126.1T/.1R 440R-N23114/440R-N23120 10 10 10
MSR127T/TP 440R-N23126/440R-N23132 10 10 10
MSR127R/RP 440R-N23129/440R-N23135 10 10 10
MSR131RTP 440R-C23139 10 10 10
MSR138DP 440R-M23151 10 10 10
MSR138.1DP 440R-M23084 10 10 10
MSR142RTP 440R-G23216 10 8 -
MSR144RTP 440R-C23205 10 10 10
MSR178DP 440R-M23227 10 10 10
MSR 200 Series
MSR210P 440R-H23176 10 10 10
MSR220P 440R-H23177 10 10 10
MSR300 Series
MSR320P connected to a 440R-W23218 10 10 10
MSR310 or MSR312
Note: For up-to-date information, visit www.ab.com
9.2 Safety Ratings
1. An MC2 can achieve up to Cat 4/PLe, SIL CL3 when individually monitored by an approved
Monitoring Relay Unit (see 9.1) that itself achieves Cat 4/PLe, SIL CL3.
2.. Two or more MC2 Sensors connected in series with an approved Relay achieves up to
CAT3/PLd/SIL CL2.
72697 Issue 4 EO: 28485
8 Magnetically Coded Non Contact Switch Installation Instructions
Note: Refer to Technical Specifications for Certification information and ratings.