CRC221-1 Online Single Door Controller

Name: CRC221-1 Online Single Door Controller
Brand: Nortech Control Systems Ltd
SKU: CRC221-1
Availability: InStock

CRC221-1

'The Single Door Option'

The CRC221-1 single-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 CRC221-1 can be used to control access through a single door 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 a single-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.
Request to Exit	Ground activated input.
Tamper Input	Ground activated input from tamper switch on housing (where applicable).

Outputs

Latch Relays	Latch relays 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 alarm is shared with the tamper alarm output.
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)

Read-In/Read-Out Security for Single High-Traffic Access Points

The CRC221-1 is purpose-built for locations requiring full bidirectional credential verification at a single door—such as server rooms, executive suites, research laboratories, or pharmacy storage areas.

By validating credentials on both entry and exit, facilities gain complete audit trails and can enforce strict anti-passback policies that prevent tailgating and credential sharing.Corporate headquarters commonly deploy CRC221-1 controllers at data centre doors where compliance regulations mandate documented access logs.

Healthcare facilities use them for medication storage rooms where both entry and departure must be recorded.

The controller's fire alarm input ensures automatic door release during emergencies, while tamper detection alerts security personnel to potential intrusion attempts.

Frequently asked questions

What's the difference between CRC221-1 and CRC220 controllers?

The CRC221-1 provides read-in/read-out control for one door (two readers per door), while CRC220 variants offer read-in with free-exit for multiple doors. Choose CRC221-1 when you need complete entry and exit credential verification.

Can the CRC221-1 connect via TCP/IP?

Yes, by adding the TCP/IP-220 adaptor module, the CRC221-1 can communicate over existing Ethernet infrastructure while still allowing RS485 connection to up to 31 additional controllers.

What enclosure options are available?

The CRC221-1 is available in plastic enclosure (325 x 300 x 135mm) or metal enclosure (330 x 300 x 105mm), both including an integral 12V DC, 3A power supply and tamper switch.

Does the controller store events during network outages?

Yes, the CRC221-1 stores up to 1,700 events (sequential mode) or 1,300 events (random mode) in non-volatile memory, automatically uploading to Norpass3 when connectivity is restored.

What power does the enclosure require?

Enclosure models accept 240V AC mains power, which the integral PSU converts to 12V DC. Four individually fused 12V outputs power connected locking devices.

Case studies