Johnson Controls AS-CVTPROx00-1 manual CVTPRO N2 Connection to Controllers with Screw Terminals

Connecting the CVTPRO Converter to a Controller with N2 Screw Terminals

To connect the CVTPRO converter to a controller with screw terminals (Figure 6):

1.Disconnect the three N2 wires from the controller screw terminals and temporarily isolate the individual bare wires with insulating tape.

2.Remove the 4-pin N2 socket from the CVTPRO N2 cable to expose the three wires (Figure 6 and Figure 7).

3.Connect the exposed N2+ (blue), N2- (white), and Ref (red) wires from the CVTPRO N2 cable to the controller screw terminals. Observe proper polarity.

4.Connect the 6-pin RJ11 phone plug on the opposite end of the CVTPRO N2 cable to the CVTPRO converter (Figure 3 and Figure 5).

CVTPRO N2 Cable

3-Pin N2 Plug

To scan a N2 Bus:

1Disconnect the N2 Bus from the N2 master controller.

2Remove the N2 plug (with attached N2 wires) from the controller (4-pin plug on the VMA and 3-pin plug on other controllers).

3Connect the 3-pin or 4-pin N2 plug that was disconnected from the controller in Step 2, to the 4-pin N2 socket on the CVTPRO converter cable. (See Figure 7.) Observe proper polarity (N2+ is blue, N2- is white, Ref is red).

4Connect the 6-pin RJ11 phone plug on the opposite end of the CVTPRO N2 cable to the CVTPRO converter (Figure 3 and Figure 5).

Cable to the 6-Pin RJ11 Phone Plug and CVTPRO Converter

Remove

4-Pin N2

Socket

cvtunt.cdr

Ref (Red)

N2- (White)

N2+ (Blue)

Wire Directly to

Controller Terminals

VMA

4-Pin Jack

S

H R N N

L E 2 2

D F - +

CVTPRO N2 Cable 3-Pin N2 Plug

Connect these components to communicate with the controller via the CVTPRO Converter.

Figure 6: CVTPRO N2 Connection to Controllers

with Screw Terminals

Connecting the CVTPRO Converter to a Controller with a N2 Jack

To connect the CVTPRO converter to a controller with a removable N2 plug:

1.Remove the 3 or 4-pin N2 plug from the controller.

2.Plug the 3-pin plug CVTPRO N2 cable into the jack on the controller (The Variable Air Volume Modular Assembly [VMA] has 4-pin jack, and other N2 controllers have 3-pin jacks). Observe proper polarity (N2+ is blue, N2- is white, Ref is red).

3.Connect the 6-pin RJ11 phone plug on the opposite end of the CVTPRO N2 cable to the CVTPRO converter (Figure 3).

Note: Figure 7 shows the possible connections with a VMA controller with a removable 4-pin N2 plug.

Cable to the 6-Pin RJ11 Phone Plug and CVTPRO Converter

4-Pin N2 Socket on the

CVTPRO N2 Cable

4-Pin N2 Plug	LD REF N2- N2+	Connect these
Unplugged		components
	SH
from the VMA		to scan the N2 Bus
		via the CVTPRO
		Converter.

To	N2 REF	N2+	To
Next			Next
	N2-	N2-
N2			N2
Device	N2+	N2 REF Device

CVTVMA

Figure 7: CVTPRO N2 Connection to a VMA with a

Removable N2 Plug

4AS-CVTPROx00-1Zone Bus/N2 Bus Interface Converter Installation Instructions