BAPI VC350A Voltage Converter Instruction Manual

VC350A Voltage Converter
Instruction Manual

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.

Fig. 1: VC350A-EZ Voltage Converter

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

Fig. 2: VC350A Voltage Converter

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
5V ………………………
10V …………………….
12V …………………….
15V …………………….
ADJ (24V) ……………| Minimum (VAC/VDC)
5.0/9.0 …………………………
10.0/14.7 ……………………..
12.0/16.9 ……………………..
15.0/20.5 ……………………..
24.0/31.0 …………………….| Maximum (VAC/VDC)
28.0/35.0 ……………………………
28.0/35.0 ……………………………
28.0/35.0 ……………………………
28.0/35.0 ……………………………
28.0/35.0 …………………………..| Input Current @ Min Input Volts (AC/DC)

5.2 VA/305 mA
8.3 VA/315 mA
9.5 VA/318 mA
11.2 VA/320 mA
16.7 VA/325 mA*

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*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 VDC
280 mA @ 12 VDC
224 mA @ 15 VDC
140 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

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.| 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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Fig. 3: EZ-Mount on a DIN Rail| Fig. 4: Catch EZ Mount hook on DIN rail before
rotating sensor into place

Fig. 5: EZ-Mount in Snap track| Fig. 6: EZ-Mount Screwed to a Surface

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.

Fig. 7: EZ-Mount with mounting tabs pushed in| Fig. 8: EZ-Mount with mounting tabs extended

Snap Track Mount

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

Fig. 9: VC350A mounted in Snap Track

Termination

| VC350A-EZ Terminal| Function
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Prior to 1/23/2013 1| After 1/23/2013| |
2| VOUT| VOUT| VDC out to peripheral devices
3| GND| GND| VDC out ground or common
4| GND| GND| VAC or VDC input ground or common
| VIN| VIN| VAC or VDC input from transformer or other power supply

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

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 shor

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

Fig. 12: VC350A showing LED positions and VOUT Adjust
Specifications subject to change without notice.

Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800
Fax+1-608-735-4804
E-mail:sales@bapihvac.com
Web: www.bapihvac.com

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