- Server
- Components
- Carbon Fibre
- Analog to digital conversion chip
- power management IC
- storage
- H3C router
- H3C server
- Inspur server
- hard disk
- HART Loop Converter Analog Input
- reader
- Ethernet module
- EDGE Guardmaster
- MAT Guardmaster
- MatGuard Mat Manager
- relay
- power control
- switch
- servo drive
- I/O module
- Bridge connector (jumper plug)
- Human Machine Interface (HMI)
- power monitor
- 1420 power monitor
- 1411 current transformer
- socket
- system
- electric relay
- frequency converter
- Install the GND connector on the board
- transceiver
- Module Option Card
- module
0102030405
440R-S35014 MSR55P 24V DC 200mV to 4V
product detail
Function
Real time monitoring of motor winding induced residual voltage (back electromotive force) through two single ended or differential inputs
When the terminal voltage remains below the set threshold of 200mV (adjustable to 4V), it is determined that "zero speed" is established, the internal redundant safety contacts are closed, and the protective door is allowed to be opened or the next step of the process is allowed
If the voltage exceeds the threshold or if there is a fault in the detection circuit, immediately disconnect the safety output and keep it locked until the speed falls below the threshold again and the reset circuit is activated
Electrical specifications
Power supply: 24 VDC ± 20%
Safe output: 2 normally open passive contacts, 2 A/250 V AC (AC-15)
Auxiliary output: 1 normally closed passive contact (status)
Input impedance: ≈ 1 M Ω, can accept sine and PWM residual voltage
Response time: ≤ 100 ms (including contact action)
Threshold adjustment: Panel knob 200 mV -4 V continuously adjustable, factory default 200 mV
security level
ISO 13849-1 Cat. 3 / PL e，IEC 62061 SIL CL 3，IEC 61508 SIL 3
Meets EN 60204-1 "Zero Speed Verification" and EN ISO 14118 energy isolation requirements
Typical Applications
Conveyor lines, centrifuges, saw blades/grinding heads driven by frequency converters: After executing STO/SS1, verify with MSR55P that they are truly stationary before opening the door
Servo press and rotary table: replace external encoders or proximity switches, reduce wiring, and improve SIL level
Connected in series with interlocking switches such as TLS-GD2 and SensaGuard, forming a complete chain of "safe shutdown → zero speed verification → door unlocking"“