Detcon RD-4X User Manual

Detcon Model RD-4X

Remote Display Monitor

Operator's Installation & Instruction Manual

March 11, 2003 Document #1738 Rev 1.1

1.0 Description

2.0 Principle of Operation

3.0 Power Requirements

4.0 Setup/Operating Software

5.0 Specifications

6.0 Installation

7.0 Start-up

8.0 Spare Parts List

9.0 Warranty

10.0 Wiring Diagram

Pg 6 & 7 Remote Display Sensor Configuration Form

detcon inc

.

1.0 DESCRIPTION

Detcon Model RD-4X remote display monitor is designed to receive and display the status of up to 16
remote gas sensor devices. Each display channel, numbered 1 through 16, corresponds with the output of a
mating multiplexer PCB assembly (Detcon part #5216), which terminates up to 16, 4-20 mA sensor devices
and transmits that information to the remote display via a two conductor RS-485 data line. The monitor
displays each sensor location’s gas type, range of detection, and provides alarm condition information.

The assembly is enclosed in a NEMA 4X molded fiberglass case with a hinged, gasketed door and is
designed for surface mounting in both indoor and outdoor locations. A glass view window is mounted in
the door. The NEMA 4X rating is, by definition, raintight and therefore, suitable for outdoor location in
electrically non-hazardous environments. The system is powered by AC line power and/or 24 VDC.

The enclosure houses a 117VAC/24VDC fused (1 amp) power supply, a de-multiplexer PCB assembly, a back-lit
graphic LCD display and a 7 pin lug-type terminal strip for input wiring; 117VAC, 24VDC and RS-485.

Detcon RD-4X Remote Display Monitor PG.2

LOCATION

#1

LOCATION

#3

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#5

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LOCATION

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12

34

56

78

910

11 12

13 14

15 16

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detcon inc.

HOUSTON, TEXAS

MODEL RD-4X REMOTE DISPLAY

00

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2.0 PRINCIPLE OF

OPERATION

In operation, the RD-4X receives information from up to 16 remote sensor devices via the RS-485 data line
and displays that information on its graphic LCD display. The information includes gas type and concen­tration present at the sensor location.

An alarm 1 (low) condition will cause the applicable channels reading to be shown in reverse video. An alarm 2
(high) condition will cause the applicable channels reading to flash between normal video and reverse video in 2
second intervals. As alarm conditions pass, the display will return to its normal condition.

3.0 POWER REQUIREMENTS

The monitor may be powered by by either 117VAC or 24VDC.

4.0 SETUP/OPERATING

SOFTWARE

In order to properly display the conditions at each sensor location, the remote display’s microprocessor
must be programmed to properly recognize each sensor location’s gas type, range of detection, and alarm
set points. The location of each sensor is also needed so as to provide a custom adhesive label that should
be placed on the face plate next to the display. These requirements are usually accomplished before ship­ment of the product from the Detcon factory. If setup is required or a new configuration will be used, refer
to the “Remote Display Sensor Configuration Form” which makes up the last two pages of this manual.

5.0 SPECIFICATIONS

Input Power

117VAC or 24VDC

Power Consumption

3 watts @ 24 VDC

Input Signal

RS-485

Operating Temperature

0° to 50°C; 32° to 122°F

Accuracy

± 2% F.S.

Warranty

1 year

6.0 INSTALLATION

1) Securely mount the RD-4X enclosure in accordance with the drawing below.

Detcon RD-4X Remote Display Monitor PG.3

11.625"

10.75"

.312" Dia. Mounting Hole

6"

9.75"

7"

2) Connect 117VAC input wiring to the lug-type terminal strip labeled “117 VAC IN” (see dwg. below).

3) If 117VAC is not available, connect 24VDC to the terminal strip labeled “24 VDC IN”.

4) Connect RS-485 wiring from the multiplexer PCB assembly (Detcon part #5216) to the terminal strip
labeled “RS-485 IN”. RS-485 data wiring should consist of 2 conductor, shielded, twisted pair. Belden
part number 9841 is required. Terminate shield to the terminal strip but do not terminate the other end.

7.0 START UP

Upon completion of all mechanical mounting and termination of all field wiring the system is ready for
power up. Before applying power be sure all appropriate systems and connections are up and running that
are being used in conjunction with the remote mount multiplexer PCB assembly. Once powered up, the
RD-4X monitor will display all applicable information in accordance with information provided in this
manual. No adjustments are necessary.

If necessary, reference document #1741, for information on the multiplexor PCB assembly (Detcon part #5216).

8.0 SPARE PARTS LIST

3596 117VAC Power Supply Assembly
5625 De-multiplexer PCB Assembly
4358 Back-lit Graphic LCD Display

9.0 WARRANTY

Detcon, Inc., as manufacturer, warrants under intended normal use each new RD-4X Remote Display to be
free from defects in material and workmanship for a period of one year from the date of shipment to the
original purchaser. Should the remote display fail to perform in accordance with published specifications
within the warranty period, return to Detcon, Inc., 2408 Timberloch Place, Bldg. D-1, The Woodlands,
Texas 77380, for necessary repairs or replacement. All warranties and service policies are FOB the Detcon
facility located in The Woodlands, Texas.

Detcon RD-4X Remote Display Monitor PG.4

Terminate RS-485 Cable Shield Here

Do not terminate the other end

Lug-type terminal strip

Multiplexer

PCB Assembly

RXDTXD

L1 L2 GND

117VAC IN 24VDC IN RS-485 IN

24 VDC IN117 VAC IN

Shield

15 16

10.0 W

IRING DIAGRAM

Detcon RD-4X Remote Display Monitor PG.5

24 VDC IN24 VDC IN

Remote PCB Assembly

+O

+S

T/+

–S

RS-485 IN

R/–

–O

GND

SHLD

RS485

24 VDC IN117 VAC IN

L2L1

All Wiring 20 gauge

Power Supply

3

1

1A

4

2

Detcon RD-4X Remote Display Monitor PG.6

detcon inc.

Detcon Model RD-4X and RD-7X are remote display monitors that provide information on up
to 16 remote gas sensor devices. Each channel, numbered 1 through 16, corresponds with the
output of a mating multiplexer PCB assembly (Detcon part #5216) which terminates up to 16
4-20 mA sensor devices and transmits that information to the remote display via a two conductor
RS-485 data line.

In order to properly display the conditions at each sensor location, the remote display’s
microproccessor must be programmed to properly recognize each sensor location’s gas type,
range of detection, and alarm set points. The location of each sensor is also needed so as to
provide a custom adhesive label that should be placed on the face plate next to the display.

To accomplish these two tasks, fill out the information below and return to Detcon, Inc.
Reference the illustration on the following page for typical layout of the remote display
information.

Examples

Location: Drill Floor, Shale Shaker, Well Head, Flare, etc.
Range: 0-25ppm, 0-100ppm, 0-25.0%, 0-100%, etc.
Gas Type: H2S, LEL, NH3, HCN, PH3, HCL, H2S, O2, CO, SO2, NO2, CL2, CLO2, H2, NO, etc.
Alarm 1 (low): 10ppm, 20ppm, 10%, 20%, etc.
Alarm 2 (high): 10ppm, 20ppm, 10%, 20%, etc.

Remote Display Sensor Configuration Form

January 1, 1997 Document # 1737

Channel # Location Range Gas Type Alarm 1 (low) Alarm 2 (high)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Shipping address: 2408 Timberloch Place, Bldg D-1, The Woodlands, Texas 77380

Mailing address: P.O. Box 8067, The Woodlands, Texas 77387-8067 ❏ Phone: [phone] ❏ Fax: [phone]

Detcon RD-4X Remote Display Monitor PG.7

Location Labels

LOCATION

#1

LOCATION

#3

LOCATION

#5

LOCATION

#7

LOCATION

#9

LOCATION

#11

LOCATION

#13

LOCATION

#15

Channel #

12

00

34

00 00

56

00 00

78

00 00

910

00 00

11 12

00 00

13 14

00 00

15 16

00 00

Range Gas Type

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detcon inc.

HOUSTON, TEXAS

00

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PPM/%

GAS

PPM/%

GAS

PPM/%

GAS

MODEL RD-4X REMOTE DISPLAY

LOCATION

#2

LOCATION

#4

LOCATION

#6

LOCATION

#8

LOCATION

#10

LOCATION

#12

LOCATION

#14

LOCATION

#16