Detcon 610-N4X-SA User Manual

Model 610-N4X-SA

NEMA 4 X Control Enclosure

Model 610-N4X www.detcon.com

Detcon Inc.

Detcon Inc.

Gas Detection Control System

www.detcon.com

www.detcon.com

d e t co n I n c .

RESET/ACK

BUTTON

Houston Texas

Houston Texas

Operator’s Installation and Instruction Manual

Covers 3 and 5 relay, Stainless and Fiberglass Enclosures

DETCON, Inc.

3200 Research Forest Dr.,

The Woodlands, Texas 77387

Ph.281.367.4100 / Fax [phone]

www.detcon.com

July 15, 2005• Document #3001• Revision 0.1

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Model 610-N4X-SA

610-N4X-SA Instruction Manual ii

Model 610-N4X-SA

Table of Contents

1.0 Introduction.............................................................................................................................................. 1

1.1 Description ........................................................................................................................................... 1

1.2 Specifications ....................................................................................................................................... 1

1.3 Relay Logic Description....................................................................................................................... 2

1.4 Front Panel Alarm Reset ...................................................................................................................... 2

2.0 Installation................................................................................................................................................ 3

2.1 Start Up ................................................................................................................................................ 6

3.0 Maintenance & Repair ............................................................................................................................ 6

4.0 Spare Parts List........................................................................................................................................ 8

5.0 Warranty .................................................................................................................................................. 8

Table of Figures

Figure 1 Mounting................................................................................................................................................ 3

Figure 2 Motherboard Schematic Wiring Diagram.............................................................................................. 4

Figure 3 Component Layout................................................................................................................................. 5

Figure 4 Alarm Wiring......................................................................................................................................... 5

Figure 5 Typical Dry Contact Connections.......................................................................................................... 6

Figure 6 Input Power Connections....................................................................................................................... 6

Figure 7 Backplane Configuration Jumpers......................................................................................................... 7

610-N4X-SA Instruction Manual iii

Model 610-N4X-SA

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Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

Phone: [phone] • Fax: [phone] •

610-N4X-SA Instruction Manual iv

www.detcon.com • [e-mail]

Model 610-N4X-SA

1.0 Introduction

Detcon Model 610-N4X-SA Gas Detection System consists of 3 major assemblies:

1. The 610-N4X-SA Fiberglass or Stainless Steel control enclosure.

2. The Model 10 single channel digital control modules.

3. The remote mount gas sensor assemblies.

The NEMA 4X control enclosure is detailed in this manual, the Model 10 digital control modules are detailed
in the Detcon Model 10 Operators Installation and Instruction Manual, and applicable sensor assemblies in
their corresponding Operators Installation and Instruction Manual.

1.1 Description

Detcon Model 610-N4X-SA control enclosure, along with Model 10 digital control modules, is designed to
serve as a host assembly for up to six remote mount gas detection sensor assemblies. The control enclosure is
rated NEMA 4X, which is by definition rain tight and therefore suitable for outdoor location in electrically
non-hazardous environments. The single channel modular design supports application flexibility wherein one
or two gas detection systems are configured dependent on the three or five alarm relay model. All control
modules are plug-in front panel accessible for easy maintenance and repair. The system is powered by
120VAC unless otherwise specified at the time of order.

Discrete output terminal strips located on the controller motherboard are provided for sensor terminations. The
4-20 mA outputs for remote recording devices and an RS-485 serial ModBus™ output are located on the
motherboard. The VDC power in, and remote alarm reset terminations are also provided on the Motherboard.
Din Rail mounted terminal block outputs are provided for two or four alarm and one fault relays.
Terminations for AC power-in are also provided on a Din Rail.

All Relays on the Model 10 digital control modules are configured as Latched, Normally Energized in No­Alarm/No-Fault condition. These relays control the state of the Alarm Relays mounted on the motherboard.
Each Alarm Relay is a DPDT relay with one set of contacts for annunciator power and one set of dry contacts
for customer use. Three – 5Amp Fuse Blocks are provided for each alarm, providing the ability to connect up
to three annunciators for each alarm condition (including Fault).

1.2 Specifications

Electrical Classification

NEMA 4X

Dimensions

24''W x 24''H x 10 1/2''D

Capacity

6 single channels

Power Input

220VAC/117VAC/24VDC

Power Consumption

<5 watts per channel (includes gas sensor and control modules. Does not include annunciators.)

Outputs

Discrete Analog 4-20 mA DC
Serial RS-485 Modbus™
Discrete or zoned alarm relays (Alarm 2 Timer(s))

Discrete alarm relays K1, K3 (and if applicable K4)

Resistive load: 7.5A, 240 VAC; 10A, 30 VDC

610-N4X-SA Instruction Manual Rev. 0.1 Page 1 of 8

Model 610-N4X-SA

Inductive load: 5A, 240 VAC; 7.5A, 30 VDC
Max. operating current: 10A

Time delay relays K2 (and if applicable K5)

Resistive load: 10A, 240 VAC; 10A, 30 VDC
Inductive load: 7A, 240 VAC; 7.5A, 30 VDC
Max. operating current: 10A

Operating Temperature Range

-40°C to +175°C

Battery Backup (If applicable)

2ea. 12V 2.9Ah batteries in series; ½ hour minimum operating time

Warranty

One year

1.3 Relay Logic Description

Relay Assignments

The 610-N4X-SA comes with 3 or 5 Alarm Relays for use with one or two gases respectively. One or two of
these relays are timer relays (Dependent on one or two gas). (Refer to Figure 3) In this typical system the
Relays are:

K1 – Alarm 1 – H2S Low Relay
K2 – Alarm 2 – H2S High Time delay relay
K3 – Fault relay (Common Fault for three and five relay systems)
K4 – Alarm 1 – LEL Low Relay (If applicable)
K5 – Alarm 2 – LEL High Time delay Relay (If Applicable)

Alarm 1 – H2S/LEL Low

During Alarm 1 conditions, the Normally Energized coil(s) on the control modules will de-energize. This will
energize Alarm 1 Relay, K1 (or K4 if applicable), applying power to annunciators attached to alarm 1 (H2S or
LEL Low). Alarm 1 conditions can be Acknowledged and Reset via the RESET/ACK Switch on the front
panel of the unit.

Alarm 2 – H2S/LEL High

During Alarm 2 conditions the Normally Energized coil(s) on the control modules will de-energize. This will
energize the Alarm 2 Relay K2 (or K5 if applicable) applying power to annunciators attached to alarm 2 (H2S
or LEL High). The time delay relay controlling the annunciators will energize for a number of minutes
determined by the setting of the relay, and will then release. Alarm 2 conditions can be Acknowledged and
Reset via the RESET/ACK Switch on the front panel of the unit.

Fault Alarm

During Fault conditions, when any controller goes into fault, or upon loss of power, the Normally Energized
coil(s) on the control modules will de-energize. This will de-energize the Fault Relay K3, applying power to
the annunciators attached to the Fault relay.

1.4 Front Panel Alarm Reset

A Front Panel mounted, normally open, momentary switch is used to reset the alarms of all Model 10
controllers. The reset function is effective when the Model 10’s respective alarms have been programmed in

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