DM504 Reverse speed detection monitoring and protection tableDetailed product description：

The DM504 speed protection meter can accurately detect the rotor speed and also detect the phenomenon of rotor reversal early; This instrument is precise, reliable, easy to operate, and can be widely used in various equipment such as pumps, turbines, compressors, etc.
DM504 speed protection meter
Characteristics
6-digit LCD speed display
4-20mA current output
Reverse monitoring
Buffer output
LED display system operation status OK, ALERT, DANGER, REVERSE
ALERT (alarm), DANGER (interlock), REVERSE (reverse) relay outputs
On site alarm reset (RESET) and remote alarm reset terminals

technical indicators
Electrical specifications
External power supply:
220/110V(AC)、 Less than 10W

DM504 Reverse Speed Detection Monitoring and Protection Table

Sensor:
Non contact eddy current sensors, magneto electric sensors, photoelectric sensors, etc
Sensor power supply voltage: -24Vdc
Input impedance:>100K Ω
Embedded voltage:>2V
Small pulse width: 0.04ms
Speed range: 0-999999 RPM
Response time: above 80 RPM (60 teeth), less than 30ms
Accuracy: ± 1 RPM
Display error: ± 1 RPM
Measurement error: ± 1 RPM
Director's measurement output 4-20mA:
Proportional to the full range of the monitoring meter;
Large load impedance: a cross connected load in the range of 0 to+24Vdc, with a load impedance of 0 to 750 Ω
Buffer output:
Output of raw signal
Output impedance: 100 Ω
Alarm point setting:
For channels, there are speed alarm and interlock alarm setpoints, which can be adjusted within the full range of 0 to 100%
relay module
Sealing: Epoxy resin
Node type: Single pole double throw, SPDT
Capacity: 3 A/220VAC or 3A/24VDC, resistive load
Output isolation: 1000VDC
Factory default setting: Relay alarm status not locked; Normal state non charging
LED indicator
OK: Is the system working properly
Alarm: Yellow LED, indicating alarm status
Interlock: Red LED indicating interlock status
Bypass: Red LED indicating bypass status
Reverse: Red LED indicating reverse status
Alarm/Alarm Reset/Alarm Bypass
Normally, when NC is connected to ARM and ALERT/DANGER/REVERSE alarms occur, NO is connected to ARM
Set alarm reset button on the front panel of the detection table
Remote alarm reset/alarm bypass terminal: Short circuit "BYPASS" and "COM" to reset and bypass the system
Environmental indicators
Temperature index:
Operating temperature: -10oC -+60oC
Storage temperature: -40oC -+100oC