D2071A Operations & Installation Guide 2.0 Installation

•If the time specified in the retard time accumulates in one or more successive alarm activations, the D2071A transmits an Alarm Zone 1 Report and activates the Alarm Relay.

•The retard timer resets to zero only when the circuit remains in a non-alarm condition (restored or trouble) for the time entered in reset time.

•When the alarm initiating circuit is normal for the time specified in reset time, the D2071A sends a Restoral Zone 1 Report.

Generally, the reset time is set to approximately half the retard time. For example, if retard time is set at 15 sec, reset time is set at 7 or 8 sec.

2.2.3Wiring

Stand-Alone Applications

Connect the normally-open (NO) contacts of each waterflow switch (a maximum of five) or mechanically activated initiating device to the alarm initiating circuit in parallel as shown in Figure 2 on page 8.

Slave Communicator Applications

1.Connect the alarm initiating circuit to an alarm indicator output (NO, dry closure) on the FACP (Figure 3 on page 9).

2.Connect Terminals 6 and 7 to the common (C) contact. Connect Terminals 8 and 9 to the NO contact.

3.Program the retard and reset times to 0 sec when connecting the alarm initiating circuit to an existing FACP.

2.3Zones 2 and 3 (Supervisory Circuits)

Use Terminals 10, 11, and 12 for supervisory circuit connections.

Zones 2 and 3 are Class “B” circuits that monitor sprinkler supervision devices such as valve tampers (maximum of 20 per circuit) in stand-alone applications. In slave communicator applications, these circuits monitor the trouble outputs of an associated FACP.

1.Wire Class “B” circuits in Modes 1, 2, or 3.

Class “B” Mode determines the mode for Zones 2 and 3.

2.Wire both circuits for the same mode configuration.

3.Connect dry contact devices to the supervisory circuits in series (normally-closed [NC]) or in parallel (NO).

4.As necessary, install a 1.8 kΩ EOL resistor at the end of the Class “B” circuits.

2.3.1Mode 1

In Mode 1 (Figure 4 ) the loops are configured for NC devices only, no EOL resistor is used. The loops are not supervised for troubles. This mode is not acceptable for the stand-alone applications.

Figure 4: Mode 1 Class “B” Wiring

10

11

NO10

C 11

NC

The Mode 1 status conditions are:

Normal: 0.0 VDC to 1.5 VDC

Alarm (Open): 1.8 VDC to 13.0 VDC

2.3.2Mode 2

Mode 2 (Figure 5) uses a 1.8 kΩ EOL resistor across each NC device in the series loops. This mode is acceptable for NFPA 72 central station and remote station stand-alone applications only when an NC valve tamper device must be used and only upon approval of the AHJ.

Figure 5: Mode 2 Class “B” Wiring

10

11

1

NO10

C 11

NC

1 - 1.8 kΩ EOL resistor

The Mode 2 status conditions are:

Normal: 0.0 VDC to 1.5 VDC

Alarm (Resistance): 1.8 VDC to 9.0 VDC

Trouble (Break): 9.3 VDC to 13.0 VDC

A single off-normal device puts the loops into alarm. A broken circuit or multiple off-normal devices put the loops into trouble, unless the loop was previously in alarm.

Bosch 09/04 74-06200-000-F

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Bosch Appliances D2071A manual Zones 2 and 3 Supervisory Circuits, Wiring Stand-Alone Applications, Mode
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D2071A specifications

The Bosch Appliances D2071A is an exemplary appliance that enhances everyday cooking and food storage with its premium features and stylish design. This model stands out in the Bosch lineup for its innovative technologies designed to provide optimal performance while ensuring user-friendly operation.

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Overall, the Bosch Appliances D2071A combines modern design with cutting-edge technology, making it a top choice for individuals looking for a high-quality refrigerator. It successfully merges functionality, efficiency, and style, thus catering to the diverse needs of today’s home cooks and families.
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