BIM-4MS Insulation Monitoring Device

Feature

Monitoring the insulation resistance for 100-1000Vdc unearthed DC systems;
Real-time monitoring of positive and negative pole insulation resistance to ground;
Automatic adaptation to the system leakage capacitance up to 5μF;
Separately adjustable response value range: 1kΩ…10MΩ;
Selectable NC or NO relay operation;
Two types of configurable alarm functions;
Supports manual/automatic reset modes;
RS-485 interface with Modbus RTU protocol;

Parameter	Value
Power supply	10-30VDC, Power 3W
DC voltage range	100V~1000V
DC voltage measurement accuracy	≤2V+0.3%
Insulation resistance measurement range	1KΩ~10MΩ (DC system voltage:100V~1000V)
Max system leakage capacitance	0-5μF
Insulation monitoring accuracy ((When: DC voltage:100V-1000V)	C_Y range	Resistance range		Accuracy
	0~0.8μF	≤60kΩ		≤3kΩ
		60kΩ<R<1MΩ		≤5%
	0.8μF ~3μF	≤60kΩ		≤6kΩ
		60kΩ<R<1MΩ		≤20%
Insulation resistance value update time after turning on	After insulation monitoring is turned on, the time until the effective resistance value can be read for the first time		0.7s~2s
Insulation resistance value update time	Switch the insulation resistance until the module can read the switched insulation resistance value.		0.5s~3s
Insulation monitoring function switching times	50*10⁵ times
Off-line withstand voltage test	<2mA
Digital output (DO)	1*DO, passive dry contact, SPST Load capacity: 4A@250Vac, 4A@30Vdc
Digital input (DI)	1*DI, 0.25mA@short circuit
Communication	RS485/ Modbus RTU
Standard	IEC 61557-1: 2018 IEC 61557-8: 2018
Dimension	Standard 35 mm DIN rail mounting Dimensions (W × H × D): 72 × 110 × 66 mm
Storage temperature	– 55°C ~90°C; ≤90%RH (non-condensing, non-corrosive), Altitude: ≤3500 m
Operating temperature	– 40°C ~75°C; ≤90%RH (non-condensing, non-corrosive), Altitude: ≤3500 m

Withstand voltage test