GIC MD71B9 Voltage Monitoring
The GIC MD71B9 Voltage Monitoring offers 240 VAC (1 Phase & 3 Phase, 4 Wire) supply voltage, 1 C/O relay output, Base / DIN rail mounting, IP 20 for Terminals, IP 40 for Enclosure degree of protection. Manufactured by GIC under the GIC Voltage Monitoring category, this model belongs to the GIC DM Series.
| Brand | GIC |
| Product Type | Voltage Monitoring |
| Model Number | MD71B9 |
GIC MD71B9 Voltage Monitoring – Technical Specifications
| Specification | Value |
|---|---|
| Supply Voltage | 240 VAC (1 Phase & 3 Phase, 4 Wire) |
| Frequency | 50/60 Hz |
| Power Consumption (Max.) | 4 VA |
| Phase Loss | Yes |
| Under Voltage | 55% to 95% |
| Over Voltage | 105% to 125% |
| ON Delay | 0.5 to 15 s (Selectable) |
| Trip Time (OFF Delay) | 5 s |
| Relay Output | 1 C/O |
| Contact Rating | 5A @ 250 VAC / 28 VDC (Resistive) |
| Electrical Life | 1X10^ 5 |
| Mechanical Life | 3X10^ 6 |
| Utilization Category AC-15 | Rated Voltage (Ue): 120/240 V, Rated Current (Ie): 3.0/1.5 A |
| Utilization Category DC-13 | Rated Voltage (Ue): 24/125/250 V, Rated Current (Ie): 2.0/0.22/0.1 A |
| Operating Temperature | -15 C To + 55 C |
| Storage Temperature | -25 C To + 70 C |
| Humidity (Non Condensing) | 95% (Rh) |
| Enclosure | Flame Retardant UL 94-V0 |
| Dimension (W x H x D) (in mm) | 36 X 60 X 90 |
| Weight | 120 g |
| Mounting | Base / DIN rail |
| Degree of Protection | IP 20 for Terminals, IP 40 for Enclosure |
The GIC MD71B9 Voltage Monitoring device is designed to deliver reliable supervision of electrical systems, ensuring equipment safety and uninterrupted performance. It operates on a 240 VAC supply suitable for both single-phase and three-phase four-wire systems, with a low power consumption of 4 VA. Offering protection against phase loss, under-voltage (55%–95%), and over-voltage (105%–125%), it provides robust defense against power fluctuations. The selectable ON delay of 0.5 to 15 seconds and a fixed trip time of 5 seconds enable flexibility for different applications. A 1 C/O relay output rated at 5A @ 250 VAC ensures reliable switching for alarms or control circuits. Built to last, it has an electrical life of 100,000 operations and a mechanical life of 3 million operations. Housed in a flame-retardant UL 94-V0 enclosure, with IP20 terminal protection and IP40 enclosure protection, the unit guarantees safety and durability. Compact in design at 36 × 60 × 90 mm and weighing 120 g, it supports DIN rail or base mounting, simplifying installation in panels.
Applications of the MD71B9 Voltage Monitoring unit include use in industrial panels, motor protection systems, HVAC units, elevators, water pumps, and commercial lighting networks. It helps prevent equipment failures by isolating circuits during voltage faults, reducing downtime and extending the life of connected machinery. In manufacturing facilities, it supports smooth operation by providing continuous monitoring of supply conditions, while in commercial complexes, it maintains reliability of critical infrastructure. Its wide operating temperature range of -15°C to +55°C and tolerance to 95% non-condensing humidity make it ideal for diverse environmental conditions. Engineers and maintenance teams trust it for its easy setup, durability, and precise monitoring functions.
Backed by GIC’s proven expertise in automation, the MD71B9 Voltage Monitoring device delivers consistent performance, high safety standards, and long-term dependability. With its accurate voltage protection features and rugged design, it remains a preferred solution for industries and system integrators seeking robust and efficient power monitoring.
