🔥 Honeywell Q7800B2003 Subbase – 7800 Series, Metal Wall Mount

The Honeywell Q7800B2003 is a metal wall-mount subbase designed for the 7800 Series Relay Modules and S7830A Expanded Annunciator. This universal wiring subbase simplifies installation by providing field wiring terminals while allowing the relay modules or annunciators to make secure connections via bifurcated contacts.

Engineered for durability and reliability, the Q7800B2003 is suitable for a wide range of environmental conditions (-40°F to 140°F) and meets NEMA 1 standards for indoor use. Its two knockouts allow easy conduit connection, and the 22 terminals provide ample wiring points for field customization.

✅ Key Features

• ✅ Universal wiring subbase for 7800 Series Relay Modules & S7830A Expanded Annunciator

• ✅ Metal wall-mount design for durable installation

• ✅ Two knockouts for convenient conduit entry

• ✅ 22 terminals provide flexible field wiring options

• ✅ Engages bifurcated contacts for secure electrical connection

• ✅ Operates in temperature range -40°F to 140°F

• ✅ NEMA 1 rated for indoor use

• ✅ Supports easy maintenance and module replacement without rewiring

📊 Technical Specifications

⚠️ Common Symptoms / When to Replace

• ❌ Loose or unreliable electrical connections to 7800 Series modules

• ❌ Corroded or damaged terminals preventing secure wiring

• ❌ Physical damage to subbase body or knockouts

• ❌ Inability to mount relay module securely

• ❌ Modules not engaging properly with bifurcated contacts

❓ Frequently Asked Questions (FAQ)

Q: What is the function of the Q7800B2003 subbase?

• It provides a metal wall-mount platform with terminals for field wiring and engages relay modules or the S7830A annunciator via bifurcated contacts.

Q: Which Honeywell devices are compatible?

• ✅ Compatible with 7800 Series Relay Modules and S7830A Expanded Annunciator.

Q: Can this subbase be used outdoors?

• ❌ No, it is NEMA 1 rated for indoor use only.

Q: How many terminals does it have?

• It includes 22 terminals for flexible field wiring.

🛠️ Installation & Maintenance Tips

• 🧰 Mount the subbase on a flat wall surface using appropriate screws and anchors.

• ⚙️ Connect field wiring to the 22 terminals before mounting the relay or annunciator module.

• 🔧 Verify that the bifurcated contacts properly engage the module terminals.

• 🧩 Inspect periodically for loose connections or corrosion on terminals.

• 🔄 Ensure conduit entries through the two knockouts are sealed properly to maintain indoor NEMA 1 rating.