Allen-Bradley / Rockwell Automation Datasheets for Protective Relays and Monitoring Relays

Protective relays and monitoring relays detect or monitor for abnormal power system conditions.
Protective Relays and Monitoring Relays: Learn more

Product Name Notes
Guardmaster CU3 Safety Relay -- 440R-S35001
Guardmaster CU3 Safety Relay -- 440R-S35002
Guardmaster CU3 Safety Relay -- 440R-S35003
440R Back EMF Monitors, 2 N.O. SafetyOutput, 1 N.C. Auxiliary Outputs,
Guardmaster Monitoring Safety Relay -- 440R-G23110 440R Single Function Safety Relays, 1 N.C. or 2 N.C. or Light Curtain1 N.C.
Guardmaster MSR117T Safety Relay -- 440R-B23211 440R Single Function Safety Relays, 1 N.C.1 N.C.
Guardmaster MSR127 Safety Relay -- 440R-N23132S
Guardmaster MSR127RP Safety Relay -- 440R-N23127
Guardmaster MSR127RP Safety Relay -- 440R-N23128
Guardmaster MSR127RP Safety Relay -- 440R-N23129
Guardmaster MSR127RP Safety Relay -- 440R-N23133
Guardmaster MSR127RP Safety Relay -- 440R-N23134
Guardmaster MSR127RP Safety Relay -- 440R-N23135
MSR127RP SAFETY MONITORING RELAY 24V ACD -- 440R-N23135S
440R Single Function Safety Relays, 1 N.C.
Guardmaster MSR131RTP Safety Relay -- 440R-C23136
Guardmaster MSR131RTP Safety Relay -- 440R-C23137
Guardmaster MSR131RTP Safety Relay -- 440R-C23139
MSR 131RTP safety relay, 3NO out, 2NO -- 440R-C23139S
440R Single Function Safety Relays, 2 N.C., 2 PNP Solid State
Guardmaster MSR142RTP Safety Relay -- 440R-G23214
Guardmaster MSR142RTP Safety Relay -- 440R-G23215
Guardmaster MSR142RTP Safety Relay -- 440R-G23216
440R Single Function Safety Relays, 4 N.C., 2 PNP Solid State
Guardmaster MSR126.1R Safety Relay -- 440R-N23118
Guardmaster MSR126.1R Safety Relay -- 440R-N23119
Guardmaster MSR126.1R Safety Relay -- 440R-N23120
440R Single Function Safety Relays, Dual ChannelN/A
Guardmaster MSR126R Safety Relay -- 440R-N23121
Guardmaster MSR126R Safety Relay -- 440R-N23122
Guardmaster MSR126R Safety Relay -- 440R-N23123
440R Single Function Safety Relays, N/A
Protection Relay w/RAD&61850 comm -- 857-3C6AEM
Protection Relay w/RAD&Enet comm -- 857-3C6AEL
Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has Glass/Glass dual serial fiber interface for 857-RAD (857-VCMFIBRE GG) COM Port 2 has Built in RJ45 10-Mbps Ethernet...
Protection Relay w/RAD&485-2 comm -- 857-3C6AED Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has Glass/Glass dual serial fiber interface for 857-RAD (857-VCMFIBRE GG) COM Port 2 has RS-485 interface (2-wire, 857-VCM 485-2)...
857 RELAY,RS485,40-265VAC/DC -- 857-3C6ADA Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has RS-485 interface (4-wire, VCM 485-4)
Protection Relay w/RAA&61850Enet comm -- 857-3C6ANM
Protection Relay w/RAA&Enet comm -- 857-3C6ANL
Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has RTD glass fiber interface for 857-RAA (857-VCMRTD) has COM Port 2 has Built in RJ45 10-Mbps Ethernet Interface...
Protection Relay w/RAA&RS485-2 comm -- 857-3C6AND Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has RTD glass fiber interface for 857-RAA (857-VCMRTD) has COM Port 2 has RS-485 interface (2-wire, 857-VCM 485-2)
Protection Relay w/RS232&61850 comm -- 857-3C6AAM Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has TTL/RS-232 (VCM TTL) COM Port 2 has Built in RJ45 10-Mbps Ethernet Interface inc. IEC 61850
Protection Relay w/RS232&Enet comm -- 857-3C6AAL Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has TTL/RS-232 (VCM TTL) COM Port 2 has Built in RJ45 10-Mbps Ethernet Interface
Protection Relay w/RS232&485-2 comm -- 857-3C6AAD Bulletin 857 Motor/Feeder Protection Relay, 40...265Vac/dc Supply Voltage, COM Port 1 has TTL/RS-232 (VCM TTL) COM Port 2 has RS-485 interface (2-wire, 857-VCM 485-2)
DIF PROTEC RELAY BUS 865 RS485 -- 865-5A7ADE Bulletin 865 Differential Protection Relay With Modbus Support
DIF PROTEC RELAY BUS 865 Enet -- 865-5A7AHE Bulletin 865 Differential Protection Relay
Guardmaster Single Input Safety Relay -- 440R-S13R2 Guardmaster Compatibility Input Safety Relay (CI), 1 Dual Channel Universal Input, 1 N.C. Auxiliary Output
Guardmaster Dual Input Safety Relay -- 440R-D22R2 Guardmaster Dual Input Safety Relay (DI), 2 Dual Channel Universal Inputs, 1 N.C. Solid State Auxiliary Output
Guardmaster Dual Input SS Safety Relay -- 440R-D22S2 Guardmaster Dual Input SS Output Safety Relay (DIS), 2 Dual Channel Universal Inputs, 1 N.C. Solid State Auxiliary Output
Guardmaster Safety Relay Expand Module -- 440R-EM4R2 Guardmaster Expansion Module Safety Relay (EM), Expansion Module (Single Wire Safe is only input), 1 N.C. Solid State Auxiliary Output
Guardmaster GLT Safety Relay -- 440R-GL2S2T Guardmaster Guard Locking safety relay with Time Delay (GLT), 1 Dual Channel Input (time delayed outputs - GLT), 1 N.O., PNP, 50mA, non-safety Auxiliary Output
Guardmaster GLP Safety Relay -- 440R-GL2S2P Guardmaster Guardlocking Proximity Inputs Safety Relay (GLP), 1 Dual Channel Input, 2 PNP Proxes, 1 N.C. Solid State Auxiliary Output
Guardmaster Single Input Safety Relay -- 440R-S12R2 Guardmaster Single Input Safety Relay (SI), 1 Dual Channel Universal Input, 1 N.C. Solid State Auxiliary Output
Guardmaster MSR320P Safety Relay -- 440R-W23218 Modular Monitoring Safety Relay - Inputs, N/A Safety Outputs, 2 N.O. Solid State Auxiliary Outputs
Guardmaster MSR330P Group 2 Safety Relay -- 440R-W23222
Guardmaster MSR330P Group1 Safety Relay -- 440R-W23221
Guardmaster MSR330P Group3 Safety Relay -- 440R-W23223
MSR338P Time Delay Expansion Module -- 440R-W23224
MSR338P Time Delay Expansion Module -- 440R-W23225
MSR338P Time Delay Expansion Module -- 440R-W23226
Modular Monitoring Safety Relay - N/A Inputs, 3 N.O. Safety Outputs, 1 N.C. Auxiliary Outputs
Guardmaster MSR329P Safety Relay -- 440R-W23217 Modular Monitoring Safety Relay - N/A Inputs, N/A Safety Outputs, 2 N.O. Solid State Auxiliary Outputs
Guardmaster MSR310P Safety Relay -- 440R-W23219
Guardmaster MSR312P Safety Relay -- 440R-W23220
Modular Monitoring Safety Relay - N/A Inputs, N/A Safety Outputs, 3 N.O. Solid State Auxiliary Outputs
Guardmaster CU4 Safety Relay -- 440R-S23173
Guardmaster CU4 Safety Relay -- 440R-S23174
Guardmaster CU4 Safety Relay -- 440R-S23175
Guardmaster MSR138.1DP Safety Relay -- 440R-M23081
Guardmaster MSR138.1DP Safety Relay -- 440R-M23082
Guardmaster MSR138.1DP Safety Relay -- 440R-M23084
Guardmaster MSR138.1DP Safety Relay -- 440R-M23085
Guardmaster MSR138.1DP Safety Relay -- 440R-M23086
Guardmaster MSR138.1DP Safety Relay -- 440R-M23088
Guardmaster MSR138.1DP Safety Relay -- 440R-M23089
Guardmaster MSR138.1DP Safety Relay -- 440R-M23090
Guardmaster MSR138.1DP Safety Relay -- 440R-M23092
Guardmaster MSR138DP Safety Relay -- 440R-M23080
Guardmaster MSR138DP Safety Relay -- 440R-M23140
Guardmaster MSR138DP Safety Relay -- 440R-M23141
Guardmaster MSR138DP Safety Relay -- 440R-M23143
Guardmaster MSR138DP Safety Relay -- 440R-M23143S
Guardmaster MSR138DP Safety Relay -- 440R-M23144
Guardmaster MSR138DP Safety Relay -- 440R-M23145
Guardmaster MSR138DP Safety Relay -- 440R-M23147
Guardmaster MSR138DP Safety Relay -- 440R-M23148
Guardmaster MSR138DP Safety Relay -- 440R-M23149
Guardmaster MSR138DP Safety Relay -- 440R-M23151
MSR138DP Time Delay safety relay -- 440R-M23147S
Monitoring Safety Relays w/ Delayed Outputs -, Inputs, Safety Outputs, N/A Auxiliary Outputs,
MachineAlert 809S 1-Phase Current Relay -- 809S-C1-10A-230 Next Generation Dedicated Function Motor Protection Relays, Single Phase Current Relay, 1...10A AC/DC max monitoring, 115/230V AC control power
MachineAlert 809S 1-Phase Current Relay -- 809S-C1-10A-48 Next Generation Dedicated Function Motor Protection Relays, Single Phase Current Relay, 1...10A AC/DC max monitoring, 24/48V AC/DC control power
Machinealert 813S 1-Phase Voltage Relay -- 813S-V1-500V-230 Next Generation Dedicated Function Motor Protection Relays, Single Phase Voltage Relay, 2...500V AC/DC max monitoring, 115/230V AC control power
Machinealert 813S 1-Phase Voltage Relay -- 813S-V1-500V-48 Next Generation Dedicated Function Motor Protection Relays, Single Phase Voltage Relay, 2...500V AC/DC max monitoring, 24/48V AC/DC control power
MachineAlert Thermistor Monitoring Relay -- 817S-PTC-115 Next Generation Dedicated Function Motor Protection Relays, Thermistor Relay, 115V AC control power
MachineAlert Thermistor Monitoring Relay -- 817S-PTC-230 Next Generation Dedicated Function Motor Protection Relays, Thermistor Relay, 230V AC control power
MachineAlert Thermistor Monitoring Relay -- 817S-PTC-48 Next Generation Dedicated Function Motor Protection Relays, Thermistor Relay, 24/48V AC/DC control power
MachineAlert 813S 3-Phase Voltage Relay -- 813S-V3-400V Next Generation Dedicated Function Motor Protection Relays, Three Phase Monitoring Relay, 380...415V AC max monitoring and control power 400Hz
MachineAlert 813S 3-Phase Voltage Relay -- 813S-V3-480V Next Generation Dedicated Function Motor Protection Relays, Three Phase Monitoring Relay, 440...480V AC max monitoring and control power 400Hz
MachineAlert 813S 3-Phase Voltage Relay -- 813S-V3-690V Next Generation Dedicated Function Motor Protection Relays, Three Phase Monitoring Relay, 600...690V AC max monitoring and control power 400Hz
MachineAlert 813S 3-Phase Voltage Relay -- 813S-V3-110V
MachineAlert 813S 3-Phase Voltage Relay -- 813S-V3-230V
Next Generation Dedicated Function Motor Protection Relays, Three Phase Monitoring Relay,
MSR57P Speed Monitoring Safety Relay -- 440R-S845AER-NNL Specialty Safety Relay, Speed Monitoring -, 5 x 1 N.C., 2.N.C., LC, 1 N.O. + 1 N.C. Inputs, 4 N.O. Solid State Auxiliary Outputs,