Ziton A45E-2 | Addressable Single Input Interface | DIN Rail Mini Module

FAQs

What type of contacts can the A45E-2 monitor?

The A45E-2 is designed to accept inputs from equipment providing normally open contact outputs. The module monitors the supervised circuit and recognizes four distinct states: Normal (contact open), Active/Alarm (contact closed), Open circuit fault (wiring break or disconnection), and Short circuit fault (wiring shorted). The supervised circuit requires a 3.9kΩ end-of-line resistor and 1.2kΩ series resistor to enable proper fault monitoring. This configuration ensures that both the contact operation and circuit integrity are continuously monitored.

How many A45E-2 modules can be connected to a single loop?

Up to 127 addressable devices in total can be connected to each Ziton control panel loop, including detectors, manual call points, and interface modules like the A45E-2. Each module requires a single unique address configured using the seven-segment DIP switch. The modules can be installed singly or in groups depending on the number of monitored inputs required, making them ideal for multiway input applications such as interfacing multiple zones from conventional fire alarm systems or monitoring multiple sprinkler flow valves.

What mounting options are available for the A45E-2?

The A45E-2 offers flexible mounting options to suit different installation requirements. The low-profile module can be clipped directly onto standard DIN rail for panel or enclosure mounting, installed in a Ziton SMB-DIN1 surface mounting box (two-unit capacity), or mounted in a SMB-DIN2 surface mounting box (four-unit capacity). The compact 45 × 78 × 28mm dimensions and lightweight 40g construction make it suitable for installation within equipment enclosures or adjacent to monitored devices, reducing the need for long spur wiring runs.

How is the address configured on the A45E-2?

The A45E-2 features a seven-segment DIP switch for setting the device address using binary coding. Each switch has a decimal value: switch 1 = 1, switch 2 = 2, switch 3 = 4, switch 4 = 8, switch 5 = 16, switch 6 = 32, and switch 7 = 64. The device address is calculated by adding the values of all switches set to the ON position. For example, to set address 007, switches 1, 2, and 3 should be ON (1 + 2 + 4 = 7) with all other switches OFF. This allows any address from 1 to 127 to be configured.

What is the maximum cable length from the module to the monitored contact?

The A45E-2 specifications indicate a maximum cable run of 10 meters from the module switching terminals to the monitored contact. This short spur length is intentional – by installing the module close to the monitored equipment and routing the addressable loop wiring to the interface location, system integrity is increased and the need for long vulnerable spur cables is eliminated. The module accepts 14, 16, or 18 AWG wire (0.75, 1.0, or 1.5mm²) with two-core screened cable recommended for the input circuit.

How does the visual indication work on the A45E-2?

The A45E-2 incorporates a red LED status indicator positioned on the front of the module. When the monitored input is activated (contact closed), the red LED flashes, providing immediate visual confirmation of the input state. This enables quick identification of activated inputs during commissioning, testing, or fault-finding without needing to check the control panel display. The LED indication works in conjunction with the full status reporting to the control panel, where input signals are displayed and can be programmed to trigger any system output.

Can the A45E-2 be used for different types of applications?

Yes, the A45E-2 is versatile and can be used for alarm, supervisory, or monitor type applications within fire detection systems. Common applications include interfacing volt-free zonal outputs from conventional fire alarm panels being monitored by an addressable system, monitoring flow valves and pressure switches from sprinkler installations, connecting to pre-action valve monitoring contacts, interfacing with suppression system status outputs, or monitoring any other fire safety ancillary equipment that provides a normally open contact output. The programmable nature of the Ziton system allows these inputs to trigger appropriate responses.

Does the A45E-2 comply with EN 54-18 standards?

Yes, the A45E-2 fully complies with EN 54-18:2005, the European standard for input/output devices used in fire detection and alarm systems. The module is also CPR (Construction Products Regulation) certified with Declaration of Performance number 360-5211-0599. However, if the module is used in conditions or circumstances that do not comply with those tested for and specified in EN 54-18, operation may be impaired and the manufacturer will not be liable. Always consult technical support if the device is to be used in conditions that differ from those detailed in EN 54-18.