Johnson Controls AS-CVTPROx00-1 Benutzerhandbuch

4    AS-CVTPROx00-

1

 Zone Bus/N2 Bus Interface Converter Installation 

Instructions

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

cvtunt.cdr

Wire Directly to 

Controller Terminals

N2+ (Blue)

N2- (White)

Ref (Red)

Cable to the

 6-Pin RJ11 Phone Plug

and CVTPRO Converter

Remove

4-Pin N2

Socket

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.

To scan a N2 Bus:

1  Disconnect the N2 Bus from the N2 master

controller.

2  Remove the N2 plug (with attached N2 wires) from

the controller (4-pin plug on the VMA and 3-pin
plug on other controllers).

3  Connect 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).

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).

N2 REF

N2-

N2+

N2+

N2-

N2 REF

REF    N2-   N2+

SH

LD

N
2
+

N
2
-

R
E
F

S
H
L
D

To 

Next 

N2

Device

To 

Next 

N2

Device

4-Pin N2 Plug

Unplugged 

from the VMA

VMA

4-Pin Jack

CVTVMA

4-Pin N2 Socket on the

CVTPRO N2 Cable

CVTPRO N2 Cable

3-Pin N2 Plug

Cable to the

 6-Pin RJ11 Phone Plug

and CVTPRO Converter

Connect these 

components

 to communicate

with the controller

via the CVTPRO

Converter.

Connect these 

components

 to scan the N2 Bus

via the CVTPRO

Converter.