Elmdene 7422-sfg-g3f Manual 〈2026〉

Installation Guide: Mastering the Elmdene 7422-SFG-G3F Roller Shutter Contact

If you are securing a commercial warehouse or a high-traffic industrial unit, your security system is only as strong as its entry points. The Elmdene 7422-SFG-G3F

is a heavy-duty, Grade 3 magnetic contact specifically engineered for the harsh environments of roller shutter doors.

In this post, we’ll break down the key technical specifications and installation tips found in the Elmdene Technical Guide to help you get it right the first time. Why Choose the 7422-SFG-G3F

This isn't your standard door contact. It is built for durability and high security:

Grade 3 Security: Suitable for higher-risk commercial installations. elmdene 7422-sfg-g3f manual

Environmental Class III (IP67): Fully sealed against dust and immersion in water, making it perfect for external-facing shutters.

Triple Reed Technology: Includes biased reeds to detect and prevent magnetic interference or tampering. Key Installation Tips

According to Elmdene technical documentation, precision is vital for these matched pairs to function correctly: 1. Orientation is Everything

The contact and magnet are a matched pair. For the sensor to trigger correctly, the magnet must be positioned with the plug on the same side as the conduit exit from the contact. Ensure the fixings are oriented to the back. 2. Guard Against Metal Interference

Roller shutters are almost always metal. If you are fitting these to ferrous metal surfaces, the magnetic sensitivity can be affected. Always fit a spacer under both the contact and the magnet to maintain proper gap distances and prevent false alarms. 3. Wiring Configuration Dimensions: 160mm (L) x 90mm (W) x 35mm

While some older models use 4-wire setups, the 7422 series often utilizes a 6-wire configuration for Grade 3 compliance.

Tamper Pair: Use a multimeter to find the Normally Closed (N.C.) pair when the magnet is not present; this is your tamper circuit.

Alarm Circuit: The remaining pair(s) will complete the circuit when the door is closed and the magnet is in range. Troubleshooting Common Issues

If you are integrating this with a panel like the Honeywell Accenta, installers on Security Warehouse forums suggest double-checking your "Hold Off" and "Battery" terminal connections. Ensure that your panel's 12V supply is steady and that you haven't swapped the tamper and alarm zones during the pull through the armored conduit.

You can view the full range of installation manuals and high-security components on the official Elmdene website. Installation Manual Walkthrough

Are you currently upgrading your warehouse security? Tell us which panel you're pairing with your Elmdene contacts in the comments!

2.1 Dimensions & Mounting

Dimensions: 160mm (L) x 90mm (W) x 35mm (D)
Enclosure: ABS self-extinguishing (UL94V-0 rated)
Mounting: Surface mount via 4 keyhole slots or DIN rail mount (optional bracket available - order code BRACKET-DIN)

Procedure:

Separate front cover from backplate by releasing four corner clips using a flathead screwdriver.
Mark drilling positions using the backplate as a template. Ensure adequate clearance (50mm above/below for cable entry).
Secure backplate to wall or distribution board using M4 screws (not supplied).
Knock out required cable entries (use grommets to maintain IP rating).

Chapter 1: Specifications (Extracted from the Manual)

The manual opens with a critical specifications table. Before installation, verify these against your system requirements:

Expert note from the manual: Do not exceed a 7Ah battery if the unit is mounted in a high ambient temperature above 40°C, as this reduces battery life and risks thermal shutdown.

Step 2: Mounting the Enclosure

Remove the lid (requires a key or screwdriver – check manual for specific tool).
Use the four internal mounting keyholes to mark the wall.
Secure with M4 or No.8 screws. The manual emphasises that earth continuity must be maintained from the enclosure to the incoming mains earth.