Product Core Brief
- Model: VM-5Z3
- Brand: Shinkawa (Shinkawa Sensor Technology)
- Series: VM-5 Series Monitor Rack
- Core Function: Provides DC power to VM-5 Series monitor and relay modules
- Product Type: Rack Power Supply Unit
- Key Specs: 24 VDC ±10% input | 170 W max consumption | 0–50°C operating
- Condition: New Surplus / Refurbished options available
Product Introduction
The Shinkawa VM-5Z3 is the power supply unit for VM-5 Series monitor racks. It converts a 24 V DC input into the internal rails needed by up to eight monitor units plus relay modules mounted in the same chassis.
This model is the stripped-down variant of the VM-5Z family. Unlike the VM-5Z1 and VM-5Z2, it has no power OK lamp and no alarm contact output . That means you cannot remotely monitor its health. The trade-off is a simpler design and a slightly lower cost. One more constraint: when you use the VM-5Z3, the entire rack’s operating temperature is capped at 0–50°C . If your cabinet runs hotter, you need a different power unit.
Frequently Asked Questions
Q: Does this unit have a power OK indicator or alarm output?
A: No. This is the defining limitation of the VM-5Z3. The official Shinkawa datasheet states explicitly: “VM-5Z3 Power Supply Unit have not the power supply OK indicator and the function of the Alarm contact output” . If you need remote fault monitoring, you must step up to the VM-5Z1 or VM-5Z2. The -Z3 is for installations where the power supply is either supervised locally or the consequence of a silent failure is acceptable.
Q: What happens if I use this in a rack alongside monitor units?
A: The rack’s temperature ceiling drops to 50°C. Shinkawa’s system constraint note is clear: when the VM-5Z3 is used, the operating temperature of units and modules in the same rack is limited to 0–50°C . If your cabinet routinely exceeds 50°C, the power supply will be the first thing to fail, and you will have no alarm contact to warn you.
Q: Is this model still in production, or is there a replacement?
A: Shinkawa has introduced successor models. The VM-5Z7 is listed as the successor to the VM-5Z3 . If you are building a new rack, verify with Shinkawa or a distributor whether the -Z3 is still available or whether the -Z7 is now the correct part. For existing installations, the -Z3 remains the drop-in replacement.
Q: Can I hot-swap this power supply while the rack is running?
A: Absolutely not. The VM-5Z3 uses a lock-type toggle switch and a terminal block for input wiring . Removing it while powered will drop the DC rails to every monitor in the rack. Power down the entire chassis, verify the 24 V input is de-energized, and wait for the capacitors to discharge before touching the terminal block.
Q: What is the most common wiring mistake with this unit?
A: Reversing the 24 V DC polarity. Shinkawa’s manual warns in bold terms: “Make especially sure not to reverse the polarities as this will cause serious damage” . The input is DC, not AC. Connecting a 24 V AC supply will also destroy the unit. Before energizing, meter the input terminals and confirm polarity with a DMM.
