Bosch D326A User Manual

Fire Alarm Systems | D326A Analog Point Contact Module

D326A Analog Point Contact Module

Digital data communications and power provided over

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a two-wire circuit

Advanced digital communications protocol compatible

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Class B circuit for dry contact devices

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Two-color status LED: green for normal, red for alarm

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EEPROM addressing in module unit

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Mount on four-inch square back box

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The D326A Analog Point Contact Module provides a variety
of fire alarm functions, such as monitoring manual pull
stations, waterflow devices, or other dry contact fire alarm
activation applications. The module allows for alarm,
trouble, and supervisory conditions. The D326A module
mounts on a plate that attaches directly to a UL‑Listed four­inch square back box having a minimum depth of 2-1/8
inches. A cover plate leaves the status LED visible.

System Overview

The D326A Analog Point Contact Module allows compatible
fire alarm control panels (FACP) to supervise Form A or B
dry contact devices in a polling circuit. The D326A has an
eight‑bit microprocessor and communicates with the
control panel (both power and data) over a two-wire polling
circuit. The initiating device circuit (NFPA Style B)
connected to the D326A can have up to 20 normally-open
(NO) dry contact devices. Each module can monitor one
normally-closed (NC) device (NC devices must be non-alarm
applications).

Certifications and Approvals

Region Certification

USA UL UOXX: Control Unit Accessories, System

(UL864, 9th edition)

FM

CSFM 7300-1615: 151

NYC-MEA 26-02-E, Vol. III

Installation/Configuration Notes

Compatibility Information

The following products are compatible with the D326A
Point Contact Module:

Category Product ID Product Description

Control Panels: D8024 Analog fire alarm control panel (FACP)

D10024A Analog FACP

Modules: D9067 Analog polling module

Programmers: D5070 Analog device programmer

Installation Considerations

There are three steps to installing the point contact module:

1. Set the point address: Use the D5070 Analog Device
Programmer to set the address by programming an
EEPROM microchip.

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2 | D326A Analog Point Contact Module

2. Connect the wiring: Wiring terminals are clearly marked
and the module leaves ample room in the back box for
wiring.

3. Mount the module in the back box: The D326A mounts
on a four-inch square back box.

Data Circuit Length

Data (or polling) circuit length is the distance over the
circuit wire from the connection at the FACP to the most
distant device and back to the FACP. Data circuit length
must include the distance to any device connected to the
circuit in a T tap. The screw terminals can accept up to 14
AWG (1.5 mm) wire, but this reduces the allowable length
of the circuit. Refer to the D9067 Installation Guide (P/
N: 74‑07690‑000) for specific wire instructions and
specifications.

Initiating Device Circuit Connections

The initiating device circuit can use any number of UL-listed
normally open (NO) contact closure devices. Device circuit
wiring must not exceed 50 Ω. Install contact closure devices
according to the manufacturer’s installation instructions.
All wiring must be supervised and power-limited.

Note Do not mix fire alarm initiating and supervisory

devices on the same module.

Power Requirements

Current

Alarm: 28 mA

Polling: 0.022 mA ± 20%

Standby: 0.035 mA (typical)

Resistance

End of Line Device 10 kΩ, 0.25 W per resistor

Initiating Device Circuit Less than 50 Ω

Voltage (input)

Nominal: 24 VDC

Range: 17 VDC to 41 VDC

Ordering Information

D326A Analog Point Contact Module

D326A

Allows compatible fire alarm control panels
(FACP) to supervise Form A or B dry contact
devices in a polling circuit

Parts Included

Quant. Component

1 Point contact module

1 Wall plate

1 EOL resistor, 10 kΩ

1 Hardware pack

1 Literature pack

Technical Specifications

Environmental Considerations

Operating Temperature +32°F to +120°F (0°C to +49°C)

Mechanical Properties

Color Ivory

Dimensions (H x W x D) 4.7 in. x 4.2 in. x 1.35 in.

(12 cm x 11 cm x 3.5 cm)

Material: Acrylonitrile-chlorinated PE-styrene (ACS)

Response Time: 2 sec

Weight 3 oz (85 g)

Americas:

Bosch Security Systems, Inc.
130 Perinton Parkway
Fairport, New York, 14450, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.us

© Bosch Security Systems Inc. 2010 | Data subject to change without notice
T1372026379 | Cur: en-US, V5, 4 Jul 2010

Europe, Middle East, Africa:

Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: [phone]
[e-mail]
www.boschsecurity.com

Asia-Pacific:

Robert Bosch (SEA) Pte Ltd, Security Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.com

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