GRI 400-W 4" Surface Mount Contact
Overview
The GRI 400-W is a 4-inch commercial-grade surface mount contact designed for access control and door security applications. This is an accessory component—not a standalone device—engineered to integrate with standard door frame and strike systems in networked access control environments. The 400-W provides reliable credential detection and authentication signaling across facility infrastructure. TCP/IP communication support enables the contact to report strike status and door state into your access control network without requiring separate proprietary wiring runs.
Key Features & Deployment Benefits
- 4-inch surface mount form factor: Matches standard commercial door frame cutouts and strike plate geometries, eliminating costly frame modifications. Install it on existing hardware without renovation delays or frame replacement expenses.
- Standard commercial door frame compatibility: Designed to work with conventional strike systems across multi-door deployments. This reduces procurement complexity—one contact type works across your facility rather than managing multiple variants.
- TCP/IP communication: Eliminates dedicated serial or relay wiring between the contact and your access control panel. Door strike signals route through your network infrastructure alongside camera feeds and reader traffic, simplifying conduit and termination work.
- Credential-based reader integration: The 400-W works with badge, card, PIN, and biometric reader ecosystems. Your access control logic remains centralized; the contact simply reports strike activation and door state back to the panel.
- Industrial & commercial rating: Built to handle repeated door cycles, vibration, and environmental variance typical of warehouses, manufacturing floors, and busy entry points. Not rated for outdoor weather exposure—keep it indoors or in protected entry vestibules.
- Networked multi-door scaling: Because the 400-W uses TCP/IP, adding doors doesn't require running new control wiring back to a central panel. Reduce infrastructure cost on large deployments (10+ doors) by consolidating strike signaling onto existing network circuits.
Integration & Compatibility
The GRI 400-W (often searched as 400 W) integrates into standard commercial access control reader systems. It is compatible with credential-based authentication workflows—badge readers, keypad entry, biometric systems, and multi-factor combinations all route through the same networked control architecture. The contact's surface mount design suits door frame installations where recessed strike mounting is impractical or cost-prohibitive.
Before specifying the 400-W, confirm your access control panel supports TCP/IP strike communication. Some legacy panels require relay modules or serial gateways to accept networked contact status. Consult your access control panel documentation to verify compatibility, or reach out to your systems integrator to validate the wiring diagram.
For large-scale facility deployments, the 400-W pairs well with managed network switches that provide PoE and VLAN segmentation—allowing you to isolate access control traffic from general IT traffic and control bandwidth allocation to strike devices.
When to Choose a Different Model
If your facility requires weatherproof outdoor strike contact (rain, salt spray, extreme temperature swings), the 4-inch surface mount is not suitable. Look for a higher IP-rated variant within the GRI 400 Series or consult a recessed or enclosed strike housing for outdoor environments. If your access control system operates on legacy proprietary wiring (non-TCP/IP), a relay-output contact or hardwired strike module may be more practical than retrofitting your infrastructure.
Frequently Asked Questions
Q: Does the GRI 400-W require a separate power supply?
A: The 400-W derives power from the TCP/IP network connection or from the access control panel's auxiliary power output, depending on your installation design. Confirm power availability in your panel documentation or network architecture before ordering.
Q: Can I install the 400-W in an outdoor entryway?
A: The 400-W is rated for commercial/industrial indoor use. If you need outdoor door strike contact, select a weatherproof variant rated IP67 or higher within the GRI product line.
Q: What size door frame does the 400-W fit?
A: The 4-inch surface mount contact is compatible with standard commercial door frames and strike plates. Verify your frame cutout dimensions match the 400-W footprint before purchase.
Q: Does the 400-W work with badge readers and keypads?
A: Yes. The 400-W integrates with credential-based reader systems including card, PIN, biometric, and multi-factor authentication workflows. The contact reports strike state to your access control panel regardless of the reader type.
Q: Is TCP/IP wiring required, or can I use legacy control wiring?
A: The 400-W supports TCP/IP communication for networked installations. If your panel does not support networked strike communication, consult your integrator about relay module adapters or hardwired contact variants.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The GRI 400-W is a practical choice for integrators deploying networked multi-door access control in commercial and light industrial facilities. The 4-inch surface mount geometry and TCP/IP communication reduce infrastructure overhead compared to relay-based or hardwired strike control, particularly on jobs where you're retrofitting access control into existing facilities with mature network infrastructure already in place.
Technical Highlights:
- 4-inch surface mount compatibility: Standard commercial door frame cutouts mean zero frame modification—critical on projects where downtime or structural work delays the schedule.
- TCP/IP integration: Strike status and door state signals route through your access control network, eliminating separate relay runs and reducing conduit labor on multi-door jobs.
- Credential-agnostic design: Works equally well with badge, PIN, biometric, or hybrid reader systems—no lock-in to a specific reader vendor, which simplifies upgrades and replacements.
Deployment Considerations:
- Confirm your access control panel has TCP/IP strike communication support before ordering. Legacy systems often require relay modules or serial gateways, which add cost and complexity.
- The 400-W is indoor-rated. If any doors are outdoors or exposed to weather, moisture, or temperature extremes, specify a higher IP-rated strike contact instead.
- Plan power distribution carefully—whether the contact draws from panel auxiliary power or network PoE affects your UPS sizing and panel power budget. Coordinate with your electrician early.
Best suited for warehouse access control retrofits, multi-tenant commercial buildings, and manufacturing facilities where you're consolidating legacy hardwired strike systems onto a modern networked platform. The 400-W (often searched as 400 W) is not the right choice for pure hardwired legacy installations or outdoor-exposed door strike applications.
