Bell Scheduling and Setup for the Reader

The Apollo terminal can be used to ring an attached bell according to schedules configured within the InfiniTime software. Refer to the Reader Configuration Table section of this document for more information on Bell Schedule Setup and Configuration. The following requirements must be met for bells to operate with the InfiniTime Software.

 

InfiniTime Software Requirements

 

 

 

Bell Wiring: Hardware Components

 

Hardware requirements vary based upon the type of bell and wiring configuration desired. Many professionals with experience with electronics and electrical circuitry may wish to design a custom circuit to suit their environment and equipment. A basic custom wiring diagram is included for reference for professionals who wish to design their own circuitry. For users who are uncomfortable with designing their own circuitry Inception Technologies offers the SY-124 External Relay which can be used to safely isolate the hardware terminal from contact with high voltage bell circuitry. An external power supply is required to provide power to the bell or buzzer. The Apollo terminal has dry relay contacts which simply close or open the circuit allowing current to pass when activated. The terminal does not provide power to the relay contacts.

 

For those unfamiliar with the electrical parts contained in the diagrams below it is important to understand their basic operation before attempting to purchase and configure the equipment necessary to ring a bell with the InfiniTime Application. The central part used in the diagrams below is referred to as a relay. A relay can be thought of as an electrical switch. A coil of wire, a common contact, a normally closed (NC) contact, and a normally open (NO) contact are the four basic parts that comprise a relay. A diagram is shown below to illustrate the operation of a relay.

 

 

 

In the normal state, or when unpowered, the relay coil is not energized and the relay contacts are in their normal state. In the normal state the normally open contacts are open and the normally closed contacts are closed as the name suggests. When activated the coil becomes energized forming a magnetic field which causes the relay contacts to close or open respectively. This is referred to as the picked state where power is applied to the relay and the relay coil is energized. The relay will make a small clicking sound when it is picked, at which point the relay contacts switch their state, the normally open contact will be closed and the normally closed contact will be open. The contacts will remain in this position until power to the coil is removed at which point the contacts will revert to their normal state. The InfiniTime Application controls the duration for which the relay is picked. Generally when using a bell the wiring is setup in order to ring the bell when the relay is picked. The diagrams below provide example wiring circuits for bell control based upon the voltage and current requirements of the bell in use.  Inception Technologies takes no responsibility for the wiring and setup of Bells and Access Control equipment. Customers attempting to wire their own access control without the assistance of a professional electrician do so at their own risk. Inception Technologies is not responsible for damage to equipment caused by improper wiring.

 

WARNING: The internal relay is rated to withstand a voltage range of 0 to 24V DC and a current load of up to 1A. Using an external power supply of more than 24 VDC will damage internal components of the Apollo SY-715 terminal. To prevent damage to the terminal, external bells should not draw more than 1A current. An external relay must be used to separate the clock from high voltage / current circuitry.

 

 

Bell Connection - High Voltage / Current Bells: Using SY-124

 

 

This diagram depicts the proper wiring of the SY-124 External Relay for use with a Bell or Buzzer. The SY-124 External relay is intended for those who do not wish to design their own circuitry for use with a bell or buzzer system. This diagram contains four major parts, the relay inside of the Apollo terminal (A), A connection box used to simplify the wiring (B), The SY-124 Relay Contacts (C), and the Bell or Buzzer with power adapter (D).

 

It is important to keep in mind the electrical specifications for the Internal Relays (A) of the Apollo terminal and its operation. When the bell is scheduled to ring the normally open relay contacts will close, completing the circuit and causing the SY-124 to pick the relay which makes the bell ring. The 6V DC power adapter provided with the SY-124 must be connected to the SY-124 and plugged in, as it provides the power necessary to energize the relay coils and pick the relay as explained in the previous section.

 

A straight through ethernet cable (B) is used to connect the Internal Apollo Relay to the SY-124 external relay.

 

The SY-124 External Relay Contacts (C) provide the final connection between the bell or buzzer and a high voltage power source. It is important to keep in mind the electrical specifications for the External SY-124 Relay contacts when connecting a high voltage power source. The SY-124 Relay Contacts are rated for 115V AC at a current of 10A. The circuit connected to the contacts of the SY-124 should not exceed these voltage or current values. For your own safety, when wiring the bell or buzzer and power source into the SY-124 ensure the AC power source of the bell or buzzer and the DC power source of the SY-124 are turned off or unplugged. It will be necessary to remove the screws from the SY-124 and open the cover to expose the contact terminals. The contact terminals are of a screw down type, simply insert the wire into the slot of the connector and tighten the screw around the wire.

 

The Bell and AC Power Source assembly (D) are the final parts of the assembly. The power source should be placed in a safe and dry location. The buzzer may be placed appropriately within your facility.

 

Bell Connection - High Voltage / Current Bells: Custom Wiring

 

 

This diagram depicts an example of custom wiring for use with a bell or buzzer. This diagram contains four major parts, the relay inside of the Apollo terminal (A), A straight through ethernet cord, connection box and DC power supply (B), A 5V Relay (C), and the bell or buzzer with power adapter (D).

 

It is important to keep in mind the electrical specifications for the Internal Relay (A) of the Apollo and its operation. When the bell is scheduled to ring the normally open relay contacts will close, completing the circuit and causing the DC power supply to pick the relay. This in turn causes the bell to ring. The 5V DC power adapter must be plugged in as it provides the power necessary to energize the relay coils and pick the relay as explained in the previous section.

 

A straight through ethernet cord must be connected to the Internal Relay of the Apollo Terminal and to a connection box. (B) The 5V DC power adapter should be connected directly to Pin 2 (Brown) within the connection box. The second contact on the DC power adapter should be wired to one end of the relay coil. The other end of the relay coil should be wired to Pin 7 (Orange) within the connection box. In this way the relay coil will energize when the circuit is closed by the Apollo terminal at the appointed time.

 

The Relay Contacts (C) provide the final connection between the bell or buzzer and a high voltage power source. It is important to keep in mind the electrical specifications for the Relay contacts when connecting a high voltage power source. The voltage and current rating of the relay contacts are dependant upon the relay's construction and model. Refer to the data sheet provided by the relay's manufacturer for this information. The circuit connected to the contacts of the relay should not exceed these voltage or current values. For your own safety, when wiring the bell or buzzer and power source into the relay contacts ensure the AC power source of the bell or buzzer and the DC power source used to energize the relay coil are turned off or unplugged. Standard procedure and safety guidelines dictate that all high voltage wiring must be safely enclosed. All measure must be taken to prevent inadvertent contact with an individual. Inception Technologies is not responsible for any damages or injuries incurred while attempting to design and wire customized circuitry for these devices. It is recommended a professional electrician perform these tasks.

 

Access Control Wiring Troubleshooting Procedure

 

Basic troubleshooting steps and failure points are listed below for the diagrams above.

 

If the bell does not ring as expected first test the wiring at the Internal Relays by shorting the wires connected Pin 2 and Pin 7 of the together. Ensure all power supplies are plugged in or turned on. The bell should ring. If the bell does not ring check the following items:

 

Custom Wiring Diagram:

 

SY-124 Diagram: