Bosch Appliances D7024 Type of Circuit, EOL Resistor, Supervisory Current, Circuit Voltage Range

D7024

Overview

2.2.1On-board Conventional Points

All on-board points, and points implemented with the D7034 work with two- or four-wire detectors. The system has an optional alarm verification feature.

Number of 2-wire Circuits	4 circuits, expandable to 8 using a D7034 Expander
Type of Circuit	Class B, Style B (use a D7014 Class A Zone Converter to convert to Class
	A, Style D as needed)
EOL Resistor	2.21k ohms (P/N: 25899, UL listed)
Supervisory Current	8 to 20 mA
Required Current for Alarm	25 mA
Maximum Short Circuit Current	44 mA
Maximum Line Resistance	150 Ω
Circuit Voltage Range	20.4 - 28.2 VDC
Maximum Detectors per Point	20 detectors (2-wire)
Total Detector Standby Current	3 mA maximum
Response Time	Either fast (500 ms) or programmable (from 1 to 89 seconds)
Dirty Detector Monitoring	Implements Bosch Security Systems Chamber Check™ and CleanMe™
	protocol to monitor conventional loops for dirty detectors.
	CleanMe™ is a Trademark of SLC Technologies Inc..

All onboard points, and points implemented with the D7034 Four Point Expander, are continuously monitored for detectors signaling a dirty condition using the Bosch Security Systems Chamber Check™ and CleanMe™ protocol. To prevent nuisance reports, there is a two-minute delay before a dirty detector is annunciated, and a six-minute delay after the detector restores from the dirty condition before the panel will restore the condition.

2.2.2Off-board Addressable Points (with D7039 Multiplex Expansion Module)

The D7039 Multiplex Expansion Module adds:

•Two Class B, Style 4 Signaling Line Circuits (SLCs)

•Each point is individually supervised for proper connection to the common bus (when over ten points are troubled, up to ten troubles will be shown per bus and the balance of the troubles will be indicated by a common bus failure message).

•Response time can be set to fast, or programmed from 1 to 89 seconds.

Input points on the SLCs are implemented with a D7042 Eight Input Remote Module.

2.2.3Enclosure Housing

The standard enclosure is manufactured from 18 Ga., cold-rolled steel, and measures 15 in. (38.1 cm) Wide, by 20.75 in. (52.7 cm) High, by 4.25 in. (10.8 cm) Deep. A keyed lock is included, and the LEDs and LCD display are visible through the door.

2.2.4 Remote LCD Keypads
Maximum number of keypads	4 D7033 keypads.
Wiring Requirements	Refer to Section 4.2, Option Bus Wiring Requirements.

	D7024 Operation and Installation Guide
41740F	Page 12	© 2005 Bosch Security Systems