Emerson KL4502X1-MA1 Terminal Blocks

The Emerson KL4502X1‑MA1 is a Relay Output Terminal Block within the DeltaV™ Electronic Marshalling CHARM subsystem. It interfaces CHARM modules operating in discrete relay output mode directly with field devices, enabling robust signal routing and seamless integration into process control systems. Engineered for hazardous-area applications, this terminal block ensures reliable relay switching and cable management in demanding automation environments.

Key Features

• Supports relay-mode CHARM modules for discrete output control

• Automatically keys to match CHARM modules on first install

• Certified for hazardous-area installation (Zone 2 / Class I Div 2)

• Supported output ratings: up to 28.8 VDC @ 5 A, 48 VDC @ 0.4 A, or 250 VAC @ 5 A (Division 2 only)

• Rugged design withstands industrial shock, vibration, and temperature extremes

• Plug-and-play design with key-position locking mechanism

Technical Specifications

Industry Applications

• Enabling relay‑based outputs from CHARM modules to field devices

• Hazardous‑area signal control in oil & gas, chemical, and refining plants

• Secure relay-switching interface for discrete output CHARMs

• Modular I/O in DeltaV Electronic Marshalling deployments

• Reliable automation connectivity in zone-classified installations

Product Advantages

• Consolidates relay-switch operations into a compact terminal block

• Rapid auto-keying avoids misalignment and wiring errors

• Certified for hazardous-area deployment, eliminating external enclosures

• Clear relay output rating supports robust process control scenarios

• Preservation of system safety with non‑sparking, keyed design

• Supports DeltaV dynamic configuration without manual addressing

Frequently Asked Questions (FAQ)

1. What is this terminal block used for?

   It provides relay output interface for CHARM modules in DeltaV Electronic Marshalling.

2. What output ratings does it support?

   28.8 VDC @ 5 A, 48 VDC @ 0.4 A, or 250 VAC @ 5 A (Class I Div 2 only).

3. What temperature range can it operate in?

   –40 °C to +70 °C.

4. How does keying work?

   Terminal block keys auto‑set on first installation to match the CHARM plug.

5. Can this be installed under power?

   Only if CHARM field wiring is de‑energized or non‑hazardous criteria are confirmed.

6. What certifications does it have?

   ATEX Zone 2 / FM Class I Div 2 compliant.

7. How reliable is it under shock and vibration?

   Rated for 10 g shock and 1 mm p‑p vibration per spec.

8. Is calibration required?

   No calibration or maintenance is necessary.

9. What environment classes can it handle?

   Suitable for high humidity, airborne contaminants (Class G3), and industrial temperatures.

10. Is it compatible with other CHARM terminal blocks?

    It is relay-specific and should be used with relay-output compatible terminal block families only.