Product SKU: DHI-ASC2204C-D
Product Overview
The Dahua DHI-ASC2204C-D is a multi-door TCP/IP access controller designed for office buildings, schools, factories, industrial sites, residential complexes and other premises requiring centralised door management. It supports four-door two-way operation with up to eight connected readers and can store 100,000 users, 100,000 cards, 3,000 fingerprints and 500,000 card-swiping records. RS-485, Wiegand and OSDP support provide flexibility when selecting compatible readers, while four lock-control channels, four door-status inputs, four exit-button inputs and extensive alarm connections support professional door installations. Multi-door interlock, anti-passback, multiple authentication, first-card unlocking, remote verification and configurable access schedules help the controller manage more complex security policies. The steel indoor enclosure accepts 100–240V AC power and supports storage-battery operation, permanent data retention, online upgrades, real-time clock correction and a watchdog mechanism for operating stability.
Key Capabilities
Four-Door Two-Way Control
The controller manages four lock channels and supports up to eight reader connections for two-way door operation. Four exit-button inputs and four door-status inputs provide the core connections required for a professionally configured four-door access-control system.
Large User and Event Capacity
Storage for 100,000 users, 100,000 cards and 500,000 access records suits larger commercial and institutional sites. Support for up to 3,000 fingerprints also allows compatible biometric readers to form part of the credential design.
Flexible Reader Connectivity
Eight Wiegand reader ports, eight-channel RS-485 reader support and confirmed OSDP compatibility give installers several reader-integration options. The exact interface, credential type, wiring distance and power requirements should be matched to the selected readers.
Advanced Access Rules
Anti-passback, multi-door interlock, multi-user unlocking, first-card unlocking, remote verification and multiple authentication allow access policies to be configured around real operating requirements rather than simple card-only entry.
Door and Alarm Integration
Eight digital alarm inputs and eight relay alarm outputs support alarm linkage with compatible sensors and warning devices. The controller can report reader tamper, intrusion, unlock timeout, duress and repeated invalid-card events.
Resilient System Operation
Access data remains stored during power failure, while the built-in real-time clock supports manual and automatic correction. Storage-battery operation, online upgrades and a watchdog mechanism help maintain reliable access-control operation.
Best For
- Office Buildings: Manages staff, visitor and restricted-area access across up to four controlled doors.
- Schools and Campuses: Supports scheduled access, holiday periods, anti-passback and central event monitoring.
- Factories and Industrial Sites: Integrates readers, locks, door contacts, exit buttons and alarm devices across controlled work areas.
- Residential and Strata Properties: Provides large credential capacity and configurable access permissions for occupants, contractors and guests.
- High-Security Commercial Sites: Supports interlocking doors, multiple authentication, duress alarms and remote verification workflows.
Why Choose the DHI-ASC2204C-D
The DHI-ASC2204C-D is better suited to multi-door projects than a basic single-door controller because it combines four lock channels, eight reader connections, extensive alarm I/O and large credential storage in one indoor enclosure. Its support for Wiegand, RS-485 and OSDP readers also gives designers more flexibility when selecting card, password or fingerprint terminals. Multi-door interlock, anti-passback, first-card unlocking and multiple authentication provide useful controls for sites with stricter movement or verification requirements. Available through Security Wholesalers, this model should be selected as part of a complete door-by-door design covering readers, locks, exit buttons, door contacts, alarm devices, power and software. The controller is IP20 and intended for protected indoor installation rather than exposed outdoor mounting.
Buyer Decision Tips
Reader and Credential Tip: Confirm whether each doorway requires entry-only or two-way reader operation and check the selected readers for Wiegand, RS-485 or OSDP compatibility. Password and fingerprint functions require compatible reader hardware.
Lock and Power Tip: Confirm lock type, current draw, fail-safe or fail-secure operation, emergency-release requirements and backup-power design. The four lock outputs are normally open by default, and no storage-battery model or capacity is specified.
Key Features & Technical Specifications
| Product Type |
Four-door two-way TCP/IP access controller in an indoor iron enclosure. |
| User Capacity |
Up to 100,000 users. |
| Card Capacity |
Up to 100,000 cards. |
| Fingerprint Capacity |
Up to 3,000 fingerprints with compatible reader hardware. |
| Record Capacity |
Up to 500,000 card-swiping records. |
| Reader Interfaces |
Eight Wiegand reader ports and eight-channel RS-485 reader support. |
| RS-485 Ports |
Nine RS-485 ports in total. |
| OSDP Support |
OSDP protocol supported. |
| Network |
One 10/100Mbps Ethernet port with IPv4, TCP and UDP support. |
| Unlock Methods |
Card, remote, password and fingerprint through compatible connected equipment. |
| Access Schedules |
128 period lists and 128 holiday periods. |
| Access Functions |
Anti-passback, multi-door interlock, first-card unlock, multi-user unlock, remote verification and multiple authentication. |
| Door Connections |
Four exit-button inputs and four door-status detection inputs. |
| Lock Control |
Four lock-control channels, normally open by default. |
| Alarm Inputs and Outputs |
Eight digital alarm inputs and eight relay alarm outputs with alarm linkage. |
| Alarm Events |
Reader tamper, intrusion, unlock timeout, duress, duress fingerprint and illegal-card threshold alarms. |
| Data and System Stability |
Permanent data retention, real-time clock correction, online upgrade and watchdog mechanism. |
| Power Supply |
100–240V AC with storage-battery power support. |
| Power Consumption |
Up to 0.8W in standby and up to 39.6W while working. |
| Enclosure |
Type C iron container made from SECC steel board with built-in buzzer. |
| Protection and Environment |
IP20 and IK04 for indoor surface mounting; -30°C to +60°C at 5%–95% non-condensing humidity. |
| Dimensions and Weight |
337 × 272 × 90mm with a gross weight of 3.5kg. |
| Certifications |
CE, FCC and UL. |
Ideal Use Cases
Office Entry Zones
Control staff and visitor movement across reception doors, secure offices and restricted work areas.
Industrial Facilities
Manage access to production areas, equipment rooms, warehouses and controlled external-door entries.
Schools and Campuses
Apply access schedules, holiday periods and monitored entry rules across selected buildings.
Strata and Residential Buildings
Store large numbers of resident, guest, contractor and blocklisted credentials.
Interlocked Security Areas
Configure multi-door interlock and multiple authentication around sensitive rooms or controlled transitions.
Choosing the Right Model
- Choose this model if: The project requires control of up to four doors with two-way readers, large user storage and advanced access rules.
- Choose a smaller controller if: Only one or two doors need to be managed and future expansion is unlikely.
- Choose a larger controller if: More than four lock channels or eight reader connections are required at the same location.
- Confirm the reader type if: OSDP, Wiegand, RS-485, fingerprint or password authentication is required.
- Confirm the enclosure location if: The controller cannot be installed indoors in a protected IP20 environment.
FAQs
- What does the DHI-ASC2204C-D access controller manage?
The DHI-ASC2204C-D manages access for up to four doors with two-way reader support when configured with compatible access-control hardware. It processes credentials, controls four lock channels, monitors four door-status inputs and supports four exit buttons. The controller is intended to operate as part of a complete system with suitable readers, locks, power, cabling and management software rather than as a standalone door-entry device.
- How many users, cards and access records can the controller store?
The controller stores up to 100,000 users, 100,000 cards and 500,000 card-swiping records. It also supports up to 3,000 fingerprints when compatible fingerprint readers and the required system configuration are used. These capacities suit larger commercial and institutional installations, but the planned credential types, enrolment process, event retention and management-platform limits should still be confirmed before deployment.
- Which card-reader interfaces are available?
The DHI-ASC2204C-D provides eight Wiegand reader ports and eight-channel RS-485 reader support, with nine RS-485 ports listed in total. OSDP protocol support is also confirmed. This gives installers flexibility when designing four-door two-way access, but reader compatibility should be checked for interface type, credential technology, power requirements, wiring distance and supported authentication functions before installation.
- Which access-control functions are supported?
The controller supports multi-door interlock, anti-passback, multi-user unlocking, remote unlocking, first-card unlocking, remote verification, blocklists and allowlists, multiple authentication and group combinations using cards, passwords or fingerprints. It also provides 128 period lists and 128 holiday periods. Available functions depend on the connected readers, management software, door hardware and commissioning choices, so the required workflow should be mapped before configuration.
- What alarms and security events can the DHI-ASC2204C-D monitor?
The DHI-ASC2204C-D supports reader tamper, intrusion, door-unlock timeout, duress, duress fingerprint and illegal-card threshold alarms. It provides eight digital alarm inputs, eight relay alarm outputs and alarm linkage. Correct operation depends on suitable sensors, door contacts, alarm devices and programmed event actions. The controller itself is rated for indoor use and should be installed where its enclosure and field wiring remain protected.
- Will access data be retained during a power failure?
Yes. Access-control data is retained permanently if power is lost, and a built-in real-time clock supports manual and automatic time correction. The controller also supports operation with a storage battery and includes a watchdog mechanism for system stability. The datasheet does not specify a battery model, capacity or inclusion, so the backup-power arrangement should be designed and supplied separately where required.
- What network, power and installation requirements apply?
The controller connects through one 10/100Mbps Ethernet port and supports IPv4, TCP and UDP. It accepts 100–240V AC power, consumes up to 0.8W in standby and up to 39.6W while working, and is designed for indoor surface mounting. Its enclosure is rated IP20 and IK04 and operates from -30°C to +60°C at 5%–95% non-condensing humidity.
- What should I confirm before ordering the DHI-ASC2204C-D?
Confirm the number of controlled doors, entry and exit reader arrangement, reader protocol, credential types, lock current requirements, exit buttons, door contacts, alarm devices, management software, network design and backup-power needs. The controller supports four-door two-way operation but does not include the complete door hardware installation. Security Wholesalers can review the proposed readers, locks and system layout to identify likely compatibility, capacity or wiring limitations before installation.
Additional Information
Dahua DHI-ASC2204C-D Datasheet
