Notifier DPI-232 User Manual

Onyx® series, Dpi-232 direct panel interface, General

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DN-6870:B1 • 03/27/2012 — Page 1 of 2

ONYX® Series

DPI-232 Direct Panel Interface

Peripheral Devices

DN-6870:B1 • G-320

General

The

DPI-232 Direct Panel Interface is a specialized modem

for extending EIA-232 serial data links to remotely located con-

trol panels and/or peripherals.
The DPI-232 is used with ONYX® Series NFS-320, NFS2-

3030, and NFS2-640 intelligent Fire Alarm Control Panels

(FACPs), and NCA-2 Network Control Annunciator.

NOTE: Please refer to the DPI-232 Manual (PN 51499) for sup-
ported legacy products.

Applications include extending distance between:

• FACP and peripheral device (CRT, printer).
• FACP and NOTI•FIRE•NET™ connection module.
• Network annunciator and NOTI•FIRE•NET™ connection

module.

Block diagrams of applications and connections charts are

available in the DPI-232 Manual.

Features

• Utilizes two “dry copper” unshielded twisted-pairs of 16 to

26 AWG (1.3 to 0.13 mm²) wire.

• Capable of carrying full duplex transmission with data rates

of up to 57.6 Kbaud in each direction over a distance of up

to 10,000 feet (3048 m).

• Each full duplex transmission link requires one DPI-232 on

each end of the two pairs.

• Each wire pair is connected to transmitter terminals (+TX, –

TX) of the DPI-232 on one end and to the receiver terminals

(+RX, –RX) of the DPI-232 on the other end.

• Each DPI-232 supervises for ground faults on the wire pair

connected to +TX and –TX terminals. The ground fault

detector has an LED indicator as well as Form-C trouble

contacts.

• Panel/peripheral terminals are electrically isolated from the

twisted pair terminals.

• Equipped with a power-saving switch that allows power

conservation at the lower data rates of up to 9,600 baud.

Higher data rates than 9,600 baud require setting switch

position to “57.6”.

• Plugs into a 120 VAC wall outlet and supplies +24 VDC to

power the DPI-232 modem. This power supply must be

used when the modem is

not being powered directly from a

FACP or other UL-Listed power-limited power supply. Listed

for fire protective signaling.

Specifications

Physical dimensions: approximately 4.375" (11.11 cm)

wide by 6.875" (17.30 cm) high. Mounts onto any panel

module location.

Temperature and humidity ranges: This system meets

NFPA requirements for operation at 0°C to 49°C (32°F to

120°F); and at a relative humidity (noncondensing) of 85%

at 30°C (86°F) per NFPA, and 93% ± 2% at 32°C ± 2°C

(89.6°F ± 1.1°F) per ULC. However, the useful life of the

system’s standby batteries and the electronic components

may be adversely affected by extreme temperature ranges

and humidity. Therefore, it is recommended that this system

and all peripherals be installed in an environment with a

nominal room temperature of 15°C to 27°C (60°F to 80°F).

Input voltage range: 18.0 to 31.0 VDC, 24 V nominal.

Power requirements: 245 mA with SW1 set to “57.6”, 148

mA with SW1 set to “LOW”.

Performance and capacity (per NFPA SLC classification):
Style 4 for data rates up to 9600 baud.
Style 3.5 for data rates up to 57.6 Kbaud.

• Distance limitations:

Up to 10,000 feet (3,048 m) on 16 to 24 AWG (1.3 to 0.2

mm²) unshielded twisted-pair wire.
OR

(whichever the above comes first)

Up to 580 ohm total (290 ohm each wire) of wire resis-

tance.

• Wiring from the DPI-232 that is installed outside the

building:
Cannot exceed 1,000 meters (3,280 feet).

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