The Videx Audio & Video Control Cabinets (models 2291A, 2291A4, 2291A8, 2291A12, 2291AB, 2291V, 2291V4, 2291V8, 2291V12 & 2291VB) are designed as multiple entrance control cabinets for audio and video intercom systems. These cabinets are available in two main sizes, CAB1 and CAB2, and are constructed from lockable, powder-coated steel. They are pre-wired internally, though external cabling and wiring to and from components will need to be made during installation.
Function Description:
The cabinets serve as the central control unit for multi-entrance intercom systems. They house essential components such as power supplies, a time clock, and switching cards, enabling communication and control across multiple door panels and apartments. Depending on the model, they can support audio-only or audio and video systems, with options for isolation and bus exchange for larger systems.
Key Features Include:
- Cabinet Types: Available in CAB1 or CAB2 lockable, powder-coated steel cabinets, chosen based on the control equipment required.
- Power Supply: Fitted with an unboxed 13.8Vdc, 5A switched-mode power supply (UBPSU5.0) with battery back-up facility. Video cabinets also include a 20Vdc Art.893N power supply.
- Time Clock: Includes an Art.701T BST/GMT time clock for programmable ON/OFF times and automatic British Summer Time correction.
- Switching Cards: Standard inclusion of a 4-entrance switching card (VX123-A for audio cabinets, VX123-V for video cabinets).
- Isolation: Available with or without isolation, supporting 4-way, 8-way, and 12-way isolation. Video cabinets with isolation also include appropriate video isolation cards (Art.3161 4-way video isolation cards).
- Bus Exchange Device: Models 2291AB and 2291VB are fitted with the Art.2206N bus exchange device for two-level systems or systems requiring expansion beyond 180 apartments.
Important Technical Specifications:
UBPSU5.0 Power Supply:
- Output Voltage: Regulated 13.8Vdc.
- Current Output: 4x 1.25A (5A max. total).
- Fused Outputs: Four fused outputs (output1, output 2, output 3 = 1A; output 4 = 3.15A) with 20mm glass 'quick blow' fuses. Fuse values are interchangeable, provided the overall current output does not exceed 5A.
- Battery Back-up: Includes a battery trickle charge fuse of 1A. Recommended for use with a 12Vdc, 7.0Ah valve regulated lead-acid battery (Videx part no. NP7-12).
- Mains Input: 230Vac, fused with a 20mm glass 'quick blow' fuse (T3.15A/250V).
- Dimensions: 235mm (L) x 100mm (W) x 40mm (D).
Art.893N Power Supply (for video cabinets only):
- Input Voltage: 230Vac @ 50/60Hz +6% -10%.
- Output Voltage: 20Vdc (800mA continuous or 1A surge).
- Output Control: Output voltage is only present when a -negative trigger is applied to the -C terminal or a +positive trigger to the +C terminal.
- Dimensions: 157.5mm (L) x 105mm (W) x 65mm (D).
- Working Temperature: -25°C to +70°C.
Art.701T BST/GMT Time Clock:
- Input Voltage: 12Vac or 12Vdc, +6% -10%.
- Current (standby, relay OFF): 47mA.
- Current (standby, relay ON): 67mA.
- Battery Back-up: Minimum 3 days.
- Relay Contacts: Dry contacts, 3A at 24Vdc, 3A at 120Vac.
- Time Bands: Six programmable ON/OFF periods.
- Dimensions: 110mm (L) x 70mm (W) x 30mm (D).
- Working Temperature: -10°C to +50°C.
VX123-A / VX123-V 4 Door Switching Cards:
- Power: Requires 12Vdc, pre-wired from UBPSU5.0 PSU.
- Fused Outputs: Four fused (1A, 20mm 'quick blow' fuse) door input/output terminals.
- Connections per Door Panel: 12Vdc/GND power, L/- databus, Busy connection, Trade output.
- VX123-V Additional Connections: SL switching signal, V1/V2 balanced video input signal.
- Dimensions: 135mm (L) x 75mm (W).
- Working Temperature: -10°C to +50°C.
Art.2204N 4 Way Isolation Card:
- Function: Protects against shorts or faults on all connections to an apartment.
- Status LEDs: 10 status LEDs (green for output in use, red for bus connection fault, red for 12Vdc input fault, yellow for S1 active).
- Addressing: 6-way dip-switch for addressing up to ID.44 (output 180).
- Dimensions: 120mm (L) x 80mm (W).
- Working Temperature: -10°C to +50°C.
Art.3161 4 Way Video Isolation Card:
- Function: Provides video isolation for video systems.
- Status LEDs: Red LED indicates a fault on the output.
- Dimensions: 94mm (L) x 48mm (W).
- Working Temperature: -10°C to +50°C.
Art.2206N Bus Exchange Device:
- Function: Expands VX2200 digital system up to 998 apartments. Supports main and sub/block entrances or single-level systems with more than 180 apartments.
- Power: 12Vdc, pre-wired from VX123-A/VX123-V switching card.
- Databus Connections: Bus out (BO,-), Local bus (LB,-), Main bus (MB,-).
- Video Connections: V/V1, V2 (main entrance panel), V/V1P, V2P (amplified video output), V/V1L, V2L (local entrance panel), V/V1O, V2O (video output to videophones).
- Programming: SW1 series of dip-switches for Unit Address (1-15) and Operating Mode.
- Dimensions: 157.5mm (L) x 105mm (W) x 65mm (D).
- Working Temperature: -10°C to +50°C.
Usage Features:
- Pre-wired Components: Most internal components come pre-wired, simplifying installation.
- Programmable Time Clock: The Art.701T time clock allows for flexible scheduling of ON/OFF times, configurable for specific days, weekdays, weekends, or all days. It also features BST/GMT automatic correction.
- Status LEDs: Various components like the UBPSU5.0 PSU, VX123-A/V switching cards, and Art.2204N isolation cards include status LEDs to indicate operational status or faults, aiding in troubleshooting.
- Modular Design: The system's modularity, with separate cards for switching, isolation, and bus exchange, allows for scalable and customizable installations.
- Easy Access for Cabling: Cabinets are designed with multiple knockouts (20mm diameter and 13.5mm x 25mm) on the top, bottom, and base plate for convenient routing of incoming and outgoing cables.
Maintenance Features:
- Fuse Replacement: The UBPSU5.0 PSU features an inline fuseholder with a pull-up latch for easy fuse replacement.
- Component Accessibility: Plug-in connections on isolation cards facilitate easy maintenance.
- Fault Indication: Status LEDs on power supplies and switching/isolation cards provide immediate visual indication of faults, streamlining diagnostic processes.
- Battery Back-up: The UBPSU5.0 PSU's battery back-up ensures continued operation during power failures and maintains time clock settings.
- Training and Support: Videx offers free training courses for engineers and provides technical help via phone and email during office hours. The technical manual is also available for download.
Installation Recommendations:
- Installation should be carried out by a competent Electrician, Security, or Communications Engineer.
- Mains connections must adhere to I.E.E. Wiring Regulations BS7671 or equivalent national standards, preferably through an all-pole circuit breaker with at least 3mm contact separation in each pole.
- Always isolate mains before removing covers or performing maintenance.
- Avoid installing in areas with excessive oil, grease, corrosive/flammable gases/liquids/vapours, or obstructions that hinder access.
- Secure cables using cable ties and grommets to maintain tidiness and security within the cabinet.
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