BAPI VC350A-EZ Voltage Converter User Manual

BAPI VC350A-EZ Voltage Converter

Overview and Identification

BAPI’s voltage converter is a cost-effective way of converting 24 VAC or VDC to 5, 12, 15 or 5 to 24 VDC for use on peripheral devices that require DC voltage. The converter is available with a 350 mA output.

The VC350A can be mounted in 2.75” snaptrack or with the high bonding tape on the bottom of the unit. The VC350A-EZ with its revolutionary EZ mounting system allows for 2.75” snaptrack, DIN rail or surface mounting.

Although most BAPI room units can run on 24 VAC power, converting to DC power eliminates the AC power “noise” which can affect the room sensor readings. BAPI’s tests show that fluctuating and inaccurate signal levels are possible when AC power wiring is present in the same cable as the signal lines. To minimize the AC voltage noise, the DC converter must be mounted as close to the controller as physically possible. Do not mount the converter at the sensor end of the wire, the AC will still couple into the sensor signal if you do. All fixed outputs of 5, 10, 12 or 15 VDC are adjustable ±10%. The adjustable model (-ADJ) has an output of 5 to 24 VDC

Specifications

Output Voltage: 5 to 24 VDC @ 350 mA
Recommended Input Voltage: 18 to 28 VAC, 24 VDC (15 VA)
Input Voltage Limits:

Model of Unit

| Minimum (VAC/VDC)| Maximum (VAC/VDC)|

Input Current @ Min Input Volts (AC/DC

---|---|---|---
5V| 5.0/9.0| 28.0/35.0| 5.2 VA/305 mA
10V| 10.0/14.7| 28.0/35.0| 8.3 VA/315 mA
12V| 12.0/16.9| 28.0/35.0.| 9.5 VA/318 mA
15V| 15.0/20.5| 28.0/35.0| 11.2 VA/320 mA
ADJ (24V)| 24.0/31.0| 28.0/35.0.| 16.7 VA/325 mA*

*These specs are for 24V output. Lower voltage output specs are similar to the fixed model specs above.

Environmental Operation Range: 0 to 95% RH non-condensing
-40 to 149°F (-40 to 65°C) 350 mA @ any output voltage-40 to 158°F (-40 to 70°C) 350 mA @ 5 VDC 330 mA @ 10 VDC280 mA @ 12 VDC224 mA @ 15 VDC140 mA @ 24 VDC
Environmental Storage Range: -40 to 176°F (-40 to 80°C)
Wiring: 4 wires, 16 to 22 gauge
Rectification: Half-Wave Rectified
Grounding: AC & DC Ground are Common

Note: The VC350A and VC350A-EZ are Class 2 circuits when they are powered from a UL Class 2 power supply.

Mounting

| This unit should be mounted at or within 2 feet of the control panel. DO NOT mount near or directly behind your room sensor.
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| The VC350 is intended to convert the AC power provided at the panel to DC. Tests show that fluctuating and inaccurate peripheral device signal levels are possible when AC power wiring is present in the same conduit as the signal lines.
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MOUNTING TABS

The EZ Mount Base has mounting tabs that can be extended or pushed in. Figures 7 and 8 show the details.

Din Rail Mounting, Fig 3

• If not showing, pull the blue mounting tabs out as shown in Figure 8.

• Catch EZ mount hook on DIN rail as shown in Figure 4.
  

• Rotate the EZ pressure module down until the bottom mounting tab snaps into place on the DIN rail.

Snap Track Mounting, Fig 5

• If showing, push the blue mounting tabs in as shown in Figure 7.
  

• The edges of the EZ Mount base will fit into the board slots in 2.75 inch snap track.

Screwed to a Surface, Fig 6

• If not showing, pull the blue mounting tabs out as shown in Figure 8
• Place the EZ Pressure unit against the surface and mark the screw holes.
• Drill 1/8” pilot holes for #8 flathead screws.
• Screw EZ Pressure unit to surface.

Note: The mounting holes in the blue mounting tabs are elongated to allow for alignment.

Snap Track Mount

• Mounting with snaptrack: Remove the VC350 from the snaptrack. Screw the snaptrack to the surface where you need to mount the unit. Replace the VC350 in the snaptract.
• Mounting without snaptrack: Peel the backing from the tape on the back of the unit and attach to the surface where you need to mount the unit.

Termination

Note: The terminals use a rising block screw terminal to hold the wires. It is possible for the block to be in a partially up position allowing the wire to be inserted under the block. Be sure that the connector screws are turned fully  counterclockwise before inserting the wire. Lightly tug on each wire after tightening to verify proper termination.

Diagnostics

Reduce the output Load
LED OFF| LED OFF| No input power| Check for Proper Voltage
LED ON| LED OFF| Output shorted to Ground| Remove power, find and remove VDC short

Note: If the DC output voltage is lower than or higher than your limits, turn the VOUT Adjustuntil the output voltage is within limits.

Fig. 12: VC350A showing LED positions and VOUT Adjust

Specifications subject to change without notice.

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