ELECTRICAL CONTROL AND AUTOMATION COMPONENTS
Electrical Control Systems to Operate Mine Doors
PLC control system to operate 1 door, 2 door air lock and more, PLC control system to operate
1 DOOR PLC CONTROL
AMD offers currently designed and proven single door PLC controls systems. This system will operate one Mine Door and any optional components at customers request.
- Our standard systems use Schneider PLC’s, if your mine only uses Allen Bradley brand PLC’s, AMD can substitute almost any brand PLC into our control systems.
- This system will operate one Mine Door and any optional components at customers request.
2 DOOR PLC CONTROL
AMD offers currently designed and proven two door PLC controls system. Only one PLC control system is used to operate both doors.
- Typically used for “air locks”, our PLC control systems will “lock-out” door #2 when door # 1 is open. Once door #1 closes, door #2 is allowed to open, maintaining integrity of your ventilation control plan.
- Traffic lighting and audible alarms are used to notify equipment drivers of door status at the entry and exit of each door. This system will operate two Mine Doors and any optional components at customer’s request. Our standard two door control systems use Schneider PLC’s, if your mine only used Allen Bradley brand PLC’s, AMD can substitute almost any brand PLC into our control systems.2 door air lock
3 DOOR PLC CONTROL
AMD offers currently designed and proven three door PLC controls system. Only one PLC control system is used to operate all three doors.
- Typically used for “T style air locks”, our PLC control systems will “lock-out” door #1 and door #2 when door # 3 is open (alternating as each door is opened or closed, once any one of the three doors are opened, the other two doors are “locked out”). Once door #3 closes, door #2 and door #1 are allowed to open, maintaining integrity of your ventilation control plan.
- Traffic lighting and audible alarms are used to notify equipment drivers of door status at the entry and exit of each door. This system will operate three Mine Doors and any optional components at customer’s request.
- Our standard three door control systems use Schneider PLC’s, if your mine only used Allen Bradley brand PLC’s, AMD can substitute almost any brand PLC into our control systems.3 Door etc.
4 DOOR PLC CONTROL
AMD offers currently designed and proven four door PLC controls system. Only one PLC is used to operate all four doors.
- Typically used for “cross style air locks”, our PLC control systems will “lock-out” doors #1, #2 and #3 when door #4 is open (alternating as each door is opened or closed, once any one of the four doors are opened, the other three doors are “locked out”). Once door #1 closes, doors #2, #3, and #4 allowed to open, maintaining integrity of your ventilation control plan.
- Traffic lighting and audible alarms are used to notify equipment drivers of door status at the entry and exit of each door. This system will operate four Mine Doors and any optional components at customer’s request.
- Our standard four door control systems use Schneider PLC’s, if your mine only used Allen Bradley brand PLC’s, AMD can substitute almost any brand PLC into our control systems.
Automation Components
Provides a robust selection of mine door automation options and components to the global mining industry. Our customized installations can be found worldwide in underground mines of almost every type, including coal, uranium, salt, gypsum, clay, gold, silver, copper, potash, titanium, molybdenum mines and more.
Traffic Lighting
- Traffic Lighting and Audible Alarms are used to warn personnel that a door could be opening or closing, indicating if door is open or closed and inform personnel if there is a problem with the door.
- AMD offers multiple types of programming combinations for traffic lighting and audible alarm.
- AMD is able to customize traffic lighting and alarm schedules to fit your mine’s needs. Let us know how we can assist. IE: Some mines require a red flashing light and audible alarm signal for 15 seconds prior to door movement. Other mines require an audible signal and green light only in the event the door is in motion.
Thru-Door Scanner
- Thru-Door Scanners use an infrared beam to scan the area between the two doors wings as the doors are closing. An emitter is mounted on entry side of the door frame, and a receiver on the opposite side door frame (exit).
- A single beam is transmitted from one side of the door frame to the other. If a piece of equipment breaks the beam, the scanner will identify the piece of equipment and return the doors to the open position to avoid a collision.
- Used to detect equipment, not to be used to scan for people.
Rope Pull Switch
- Rope pull switches are used to open and close a door. Typically 4 rope pull switches are used per door, 2 on the entry side and 2 on the exit side. At the entry side of door, one pull switch is located on the left wall, the other on the right wall. Rope pull switches are typically installed to the roof of the mine. See example photo.
- To minimize the amount of rope pull switches to only 4 per door, each rope pull switch can either open or close the door. IE: If the door is in the closed position, any of the 4 pull switches can be used to open the door.
Mushroom Head Push Buttons
- Mushroom Head Push Buttons are used to open and close a door. Typically 4 push buttons are used per door, 2 on the entry side and 2 on the exit side. At the entry side of door, one push button is located on the left wall, the other on the right wall. Push buttons are typically installed approximately 42” above the mine floor so equipment/truck drivers as well as pedestrians can access easily.
- Multiple types available, typically designated by the mine operator.
Limit Switch (type: GO Switch)
- Limit switches are designed to provide safe and reliable signaling for industrial work sites. AMD mounts all limit switches to doors’ cap headers and wires them back to the sites’ PLC enclosures in high traffic areas to guarantee mechanical protection.
- Limit switches are used to manually control electric motor functions above and beyond the PLC Control Cabinet. Our open- and closed-door limit switches activate on physical contact when the door is in motion.
- There are four IP67-rated, electro-mechanical switches used to identify the mine door’s open or closed position. Our customers know there are many advantages to installing limit switches on mine doors.
Roof Mounted Equipment Detectors
- Roof mounted equipment detectors are installed near the roof at the entry and exit of each mine door.
- Detectors are mounted a specific distance before and after each door. As a piece of equipment is travelling towards a door, the first detector identifies the piece of equipment and a signal is sent to the PLC controls system to open the door. Once the equipment passes through the door and under the second detector, a signal is again sent to the PLC control system to close the door.
- Roof Mounted Equipment Detectors significantly reduce travel times through a mine door, the driver no longer needs to stop and pull a switch to open and close the door.
- Uses Microwave Doppler Radar to detect equipment in motion.
- IP65 Class Protection, tilt angles 0-180°, offers 6 modes of detection filtering.
- Three different models to choose from based upon roof height.
Remote Controls
Remote Control Systems
- Operate you ventilation mine door with wireless relays activated by handheld portable remote controls or stationary dry contact input transmitters. Multi-channel units provide the flexibility for numerous functions. User selectable network frequencies allow many systems to operate in the same vicinity without interference. Customizable relay operation means you can fit the action to your application for truly precise control.
- Transmitters are heavy duty and can be purchased in any quantity.
