CRC221-2 Online Two Door Controller

Name: CRC221-2 Online Two Door Controller
Brand: Nortech Control Systems Ltd
SKU: CRC221-2
Availability: InStock

CRC221-2

'2 Doors with Full Read-in/Read-out Controlled From A Single Panel'

The CRC221-2 two-door controller is part of a range of versatile modular on-line access control panels suitable for controlling access points such as doors and vehicle barriers by validating credentials such as cards, key fobs and vehicle tags.

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Product features & benefits

These controllers are components of an online access control system linked to Norpass3 Access Control Management Software via either TCP/IP or RS485.

The CRC221-2 can be used to control access through one or two doors or barriers with read-in and read-out control , while supporting a wide range of managed access control features and a comprehensive range of interface formats. The enclosure houses 2 single-door interface modules plus an integral power supply unit.

Alternatively, for applications requiring read-in access control only, the CRC220-2 offers access through two doors or barriers with read-in control and free exit, while supporting a wide range of managed access control features and a comprehensive range of interface formats. The enclosure houses a two- door interface module plus an integral power supply unit.

Benefits

Easily managed using simple centralised management of data
Choice of mix and match module types enables cost-effective network structure
Support for a wide range of card formats and card reader interfaces makes it the ideal choice for enhancing an existing access control system
Security levels can be tailored to customer needs using optional security features
Improved visitor card management when used with our card capture reader
Meets demanding customer requirements through a choice of enclosures with tamper alarms fitted as standard plus features such as fire alarm control input, individual door alarms and configurable inputs and outputs.

Specifications

Electrical

Supply Voltage	Enclosures: 240V AC PCB: 12V DC
Current Requirement	100 mA quiescent, 230 mA while reading (both readers)
Reader Supply	12V DC (100 mA max.) 5V DC option

Physical

Local settings	DIP switches for setting node identity
Dimensions (mm)	PCB: 115 x 120 x 35 (H x W x D) Plastic enclosure: 325 x 300 x 135 (H x W x D) Metal enclosure: 330 x 300 x 105 (H x W x D)
Cable Termination	Plug-in screw terminal blocks

Environmental

Operating Temperature	0°C to 40°C
Storage Temperature	-20°C to 70°C
Relative Humidity	95% non-condensing

Capacity

Sequential Mode	65,000 sequential card numbers (0 - 19,999), 1,700 events
Random Mode	8,000 random card numbers, 1,300 events

data communications

Management Interface	RS485 or TCP/IP depending upon model

Inputs

Readers	2 x 5-wire reader interfaces for Clock & Data (ABA Track 2) & Wiegand formats
Arming	2 independent, ground activated inputs. Open-circuit arming.
Door Open Monitor	Ground activated input for monitoring door open status. CRC220: 2 independent inputs CRC221: 1 input
Request to Exit	Ground activated input. CRC220: 2 independent inputs CRC221: 1 input
Tamper Input	Ground activated input from tamper switch on housing (where applicable).

Outputs

Latch Relays	2 independent latch relays (1 relay in CRC221) with change-over contacts rated at 2A at 30V DC.
Auxiliary Output	2 independent open-collector outputs for auxiliary control such as card capture.
Tamper Alarm	Open-collector output (300mA), activated when tamper alarm is active.
Door Alarm	Door 1 alarm is shared with the tamper alarm output. On CR220, door 2 alarm output is a separate open-collector output (300mA).
Assignable Output	Open-collector output controlled from Norpass3 in online operation.

Cabling

CRC200 to reader	Belden 9536 or equivalent (100m maximum)
RS485 comm’s	Belden 9729 or equivalent (1,200m maximum overall length)

Dual-Door Read-In/Read-Out Control from a Single Enclosure

The CRC221-2 delivers full bidirectional access control for two doors, making it the cost-effective choice for securing adjacent high-security areas—such as paired laboratory entrances, connected office suites, or dual-entrance reception areas.

Each door maintains independent read-in/read-out verification while sharing a single enclosure and power supply, reducing installation complexity.

This controller excels in professional office environments where two meeting rooms, a server room and adjacent office, or front and rear entrances require matched security levels.

Law firms, financial services companies, and healthcare clinics commonly deploy CRC221-2 units to maintain comprehensive access records for compliance auditing while minimising cabinet space and wiring requirements.

Frequently asked questions

How many readers can connect to the CRC221-2?

The CRC221-2 supports four readers total—two per door for read-in/read-out operation. This enables full credential verification at both entry and exit for each controlled door.

Can I mix read-in/read-out and read-in/free-exit doors?

Yes, the modular design allows flexible configuration. You can use one module for read-in/read-out and dedicate the second module differently, though typically CRC221-2 is used for consistent dual-verification.

What communication options are available?

Standard models use RS485 communication. Adding a TCP/IP-220 adaptor enables Ethernet connectivity while maintaining the ability to daisy-chain additional controllers via RS485.

Are metal and plastic enclosures available?

Yes, both enclosure types are available. Plastic enclosures measure 325 x 300 x 135mm while metal enclosures measure 330 x 300 x 105mm, both including integral PSU and tamper switch.

What happens if Norpass3 loses connection?

Controllers continue operating independently using locally stored credentials and access rules. Up to 1,700 events queue in non-volatile memory for upload when connectivity restores.

Case studies