Johnson Controls LN Series User Manual

LN Series Free Programmable LN-PRGxxx-12 Controllers Installation Instructions10
Output Wiring Recommendations
Output wiring recommendations include:
• For a wire length less than 75 feet (23 m) long, use
either a shielded or unshielded 18 AWG wire.
• For a wire length up to 200 feet (61 m) long, use a
shielded 18 AWG wire.
• The shield of the wire should be grounded on the
controller side and the shield length should be kept
as short as possible.
Wiring Digital Outputs (DOx)
Digital outputs are all made of triacs and there is not
voltage present on the output terminals. Therefore, you
must add an external power source, typically 24 VAC.
Note: To measure the state of a triac output, an
external load must be connected.
If a 24 VAC relay is being controlled, connect it to a
digital output according to Figure 24 or Figure 25,
ensuring that the transformer’s secondary wiring is
grounded as shown.
If a floating actuator is being controlled, connect the
digital output according to Figure 26.
Wiring Universal Outputs (UOx)
You can configure universal outputs to provide either a
discrete signal of 0 or 12 VDC, a linear signal ranging
from 0 to 10 VDC, or a 0 to 20 mA signal
(LN-PRG300-12, LN-PRG4x0-12 and LN-PRG6x0-12
only). The discrete signal can be used to generate a
pulse wave modulation (PWM) signal or a simple
two-state signal. These outputs are protected by an
auto-reset fuse.
Wiring Discrete Outputs
If a 12 VDC relay is being controlled, connect it to a
universal output according to Figure 27.
Wiring Current Outputs
The 0 to 20 mA signal is configurable by jumper
(available for LN-PRG300-12, LN-PRG4x0-12, and
LN-PRG6x0-12 only; for jumper location, see
Configuration Jumper Location and Identification
).
Figure 24: Digital Triac Output — Relay Using
the Same Power Source as Controller
DOx
Cx
24VAC Relay
A2
A1
Transformer
24VAC
24VCOM
AC
Electrical
System Ground
Fuse: 4A Max.
Fast Acting
Controller
24VAC
Load
DOx
Cx
24VAC Relay
A2
A1
Transformer
24VAC
24VCOM
AC
Electrical
System Ground
Fuse: 4A Max.
Fast Acting
Controller
24VAC
Load
Line Switching Neutral Switching
Figure 25: Digital Triac Output, Line
Switching – Relay Using an External Power
Source
DOx
Cx
24VAC Relay
A2
A1
Transformer
AC
Electrical
System Ground
Fuse: 4A Max.
Fast Acting
24VAC
Load
DOx
Cx
24VAC Relay
A2
A1
Transformer
AC
Electrical System
Ground
Fuse: 4A Max.
Fast Acting
24VAC
Load
Line Switching Neutral Switching
Figure 26: Digital Triac Output –
Floating Actuator
Actuator
~
~
24VAC
DOy
Cx
DOx
Cy
Figure 27: Discrete 0 or 12 VDC Universal
Output – Relay
Figure 28: 0 to 20 mA Universal Output and
Jumper Configuration

Johnson Controls LN Series Specifications

General

Brand	Johnson Controls
Model	LN Series
Category	Controller
Language	English