Basic Information
Model NO.
IS-3F (Intercom system 3 frequency)
Specification
200*120*50mm
Capacity
30000 Pieces/Year
Product Description
Specifically designed and manufactured to provide CRYSTAL CLEAR communications to help create a safer work environment, which increases PRODUCTIVITY and lowers the risk of liability.
Safety First
Mainly used on construction and temporary Hoists/Elevators, it is recommended by OSHA and considered the industry standard. Communication is critical to provide workers a way to contact the elevator operator in case of an emergency. When seconds count for medical attention, this system ensures immediate contact.
System Overview
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Two-way communications with interchangeable units.
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Powered by safe 24 volts DC with battery backup.
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No antenna wire required; Multiple frequency channels.
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Operates in extreme weather conditions.
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Heavy duty composite Nylon Plastic enclosure.
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Emergency alarm switches on all units.
Functional Features
- ● Signal transmission via protection loop line; stable and reliable without special cables.
- ● No electromagnetic wave pollution; no need to apply for radio frequency.
- ● Electronic volume control and squelch function.
- ● Three frequencies available (250KHz, 741KHz, 800KHz) for clear voice.
Specification Parameter
Supply Voltage
220V AC or 110V AC
Effective Range
> 300m (Conductor loop resistance < 600 ohm)
Frequencies
250KHz, 741KHz or 800KHz
System Installation
Floor Installation: Connect the intercom with the accessory power cable. A dedicated power supply device can drive fewer than twenty units. The protective ground wire must pass through the coupler hole and connect with the ground. Important: Do not ground the wire in the middle.
Lifting Cage Installation: Connect the intercom and coupler as per drawings. Ensure the protective ground wire in the cage passes through the coupler hole to the ground.
Terminal Description
| NO |
Terminal |
Cable |
Explain |
| 1 | L | Power (Blue) | Three core cable |
| 2 | N | Power (Brown) | Three core cable |
| 3 | G | Ground (Yellow) | Three core cable |
| 4 | -V | Cable shield | Four core shielded |
| 5 | -V | Negative power (Brown) | Four core shielded |
| 6 | +V | Positive power (Black) | Four core shielded |
| 7 | +V | Positive power (Blue) | Four core shielded |
Frequently Asked Questions
What causes total communication failure?
This is often due to the protective ground wire being grounded in the middle, or the earth wire in the hanging basket not being properly connected.
How can I fix poor communication quality?
Check for high resistance caused by poor ground wiring or loose connections. Ensure all terminals are secure.
Does this system interfere with other radio equipment?
No, it does not use radio waves for transmission, so it requires no RF application and will not interfere with other construction area signals.
What is the maximum effective range of the intercom?
The system supports an effective range of more than 300 meters, provided the conductor loop resistance is below 600 ohms.
Can the system handle motor interference?
Yes, but ensure cables have proper shielding to mitigate potential interference caused by high-power electric motors.
Is there an emergency signal function?
Yes, every unit is equipped with an emergency alarm button to alert operators or workers instantly.