Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: 1-888-967-5224 | Website: workaci.com
Page 1
Version: 4.0
I0000195
2.75"
(69.85 mm) 1.12"
(28.55 mm)
4.50"
(114.30 mm)
ROOM, VERSION 1
[R]
FRONT
BOTTOM
RIGHT
FIGURE 1: ROOM DIMENSIONS
ROOM SERIES
Installation & Operation Instructions
A/LCD-R-4-20MA
Phone: 1-888-967-5224
Website: workaci.com
PRECAUTIONS
• DO NOT RUN THE WIRING IN ANY CONDUIT
WITH LINE VOLTAGE (24/120/230 VAC).
GENERAL INFORMATION
The A/LCD-R-4-20MA is a low power, high accuracy, 3.5
digit LCD display. The A/LCD-R-4-20MA may be used
with any 4 to 20 mA loop powered Temperature,
Relative Humidity, Current, and Dierential or Gage
Pressure transmitter. The display is factory calibrated
for a preset range. A great solution for remote
monitoring of any 4-20 mA loop powered device.
MOUNTING INSTRUCTIONS
Separate the cover from the base. The ACI/LCD is
shipped as a two-piece unit. The LCD Module must be
unplugged from the 10 pin connector before the base
of the sensor may be mounted. Attach the base directly
to the wall or to a standard 2” x 4” junction box using
the (2) #6-32 x 1”screws provided.
Take care when mounting. Check local code for
mounting height requirements. Typical mounting
heights are 48-60” (1.2-1.5 m) o the ground and at
least 1.5’ (0.5 m) from the adjacent wall. The sensor
should be mounted in an area where air circulation is
well mixed and not blocked by obstructions - see
FIGURE 2 (p. 2).
Note: If mounting an LCD-RS(with setpoint), you must
mount to standard 2” x 4” junction box. It cannot be
surface mounted. The set point PCB is located on back
of enclosure (see Figure 3 p.2).
Refer to the wiring instructions (p. 2) to make
necessary connections.
LCD Installation
The LCD Module should then be gently inserted into
the 10 pin connector. Tighten the cover down, using
the (2) 1/16” Allen screws located in the bottom of the
housing. Take care to make sure the LCD module lines
up with the enclosure LCD window. The LCD module
can be bent if adjustments are needed. A
1/16” Hex driver is needed to secure the cover to the
base.
WIRING INSTRUCTIONS
Do not apply power to the (+) Input terminal
or you may damage the LCD Display.
Open the cover of the enclosure. ACI
recommends 16 to 26 AWG twisted pair wires or
shielded cable for all transmitters. Refer to
FIGURE 4 (p. 3) and TABLE 1 (p. 2) for wiring
connections. The number of wires needed
depends on the application. All wiring must
comply with all local and National Electric Codes.
ACI/LCD-4 to 20 mA will drop a maximum of 7
VDC, therefore:
Vs-V1>7VDC
Where: Vs = Source Voltage
V1 = Voltage Requirement of
Transmitter (Load)
7V = Maximum Voltage Drop of
ACI/LCD-4 to 20 mA
