140CHS21000 | Schneider Modicon Quantum Hot Standby kit

Schneider Electric 140CHS21000 Modicon Quantum Hot Standby Kit — Dual Redundancy, Fiber Optic, 3M Cable

The 140CHS21000 is a Hot Standby Kit for Schneider Electric's Modicon Quantum automation platform. It provides all components necessary to build a dual redundant Hot Standby system with automatic failover between two Quantum PLCs. The kit includes two 140CHS11000 Hot Standby modules, a 3-meter fiber optic cable for high-speed synchronization, and accessories for seamless integration into critical industrial control systems.

Kit Contents

• 2 × 140CHS11000 Hot Standby modules
• 1 × 3m fiber optic cable for inter-PLC synchronization link
• 1 × CHS downloadable function block (software)
• 1 × S908 connection kit
• 1 × Installation manual

Key Specifications

• Manufacturer: Schneider Electric
• Series: Modicon Quantum
• Type: Hot Standby Kit (Dual Redundancy System)
• Function: Automatic failover between two Quantum PLCs
• Communication: Fiber optic link between Hot Standby modules
• Fiber Optic Cable Length: 3 meters (included)
• Hot Standby Module (140CHS11000) Bus Current: 700 mA
• Hot Standby Module Communication: 2 connectors (transmission and reception) for fiber optic link
• Compatible CPUs: 140 CPUs programmable in LL984 language; 140 CPU 434 12A / 534 14B in IEC language
• Compatible Software: ProWORX NXT V2.0 or Concept Version ≥ 2.0
• Compatible I/O: Quantum, 800 Series, and Sy/Max (remote I/O only)
• CHS Function Block: Version ≥ 2.0 required
• Dimensions: 4 × 10.5 × 25 cm (H × W × D) [AutoOilTech]
• Weight: 1.06 kg (Hot Standby module 140CHS11000) [Official manual]
• Power Source: AC-powered / DC-powered (via Quantum backplane)
• Communication Protocols: Ethernet, Modbus
• Controller Design: Modular
• Country of Origin: France
• Status: Legacy / Mature product

Architecture & Functionality

• Dual Redundancy: Two Quantum PLCs operate in primary/standby mode with automatic switchover
• Fiber Optic Synchronization: High-speed data exchange between PLCs via 3m fiber optic cable for real-time state mirroring
• Automatic Failover: If the primary PLC fails, the standby PLC takes over within milliseconds without process interruption
• S908 Remote I/O Support: Kit includes S908 connection kit for distributed I/O network integration
• Hot Standby Module (140CHS11000): Each module provides 2 fiber optic connectors (TX/RX) and requires 700 mA bus current
• Switchover Time: Milliseconds (exact value depends on system configuration and scan time)
• Data Exchange Impact: Minimal impact on PLC scan time during synchronization

Installation Guide

1. Install two 140CHS11000 Hot Standby modules into the dedicated slots of two Quantum racks (primary and standby).
2. Connect the 3-meter fiber optic cable between the TX connector of the primary CHS module and the RX connector of the standby CHS module, and vice versa.
3. Install the S908 connection kit for remote I/O network integration if required.
4. Load the CHS downloadable function block (version ≥ 2.0) into both PLCs via ProWORX NXT or Concept software.
5. Configure primary/standby roles and failover parameters in the CHS function block.
6. Verify fiber optic link integrity via module LEDs before bringing the system online.
7. Perform a failover test by simulating primary PLC failure to verify automatic switchover.

FAQ

Q: Is 140CHS21000 a 13-slot rack?
A: No. Some sources incorrectly describe 140CHS21000 as a 13-slot rack. The 140CHS21000 is a Hot Standby Kit that includes two 140CHS11000 modules, a 3m fiber optic cable, and accessories. The 13-slot rack for Quantum is 140XBP01600.

Q: Is 140CHS21000 a CPU or power supply module?
A: No. Some sources incorrectly describe it as an analog interface module, PLC power supply, or CPU. The 140CHS21000 is a redundancy kit for building Hot Standby systems — it does not perform processing or power supply functions.

Q: What is the difference between 140CHS21000 and 140CHS11000?
A: 140CHS11000 is the individual Hot Standby module. 140CHS21000 is the complete kit containing two 140CHS11000 modules plus cable, software, and accessories.

Q: What is the difference between 140CHS21000 and 140CHS41010/140CHS41020?
A: 140CHS21000 is the basic Hot Standby kit (modules + cable + software). 140CHS41010 and 140CHS41020 are economy Hot Standby kits that include CPUs (140CPU11302 or 140CPU11303), power supplies, racks, and all necessary components for a complete redundant system.

Q: What CPUs are compatible with 140CHS21000?
A: 140 CPUs programmable in LL984 language and 140 CPU 434 12A / 534 14B in IEC language. Unity Pro CPUs (140CPU65150/65160/67160 etc.) use different Hot Standby architecture.

Q: Is 140CHS21000 compatible with Unity Pro?
A: No. The 140CHS21000 kit is designed for ProWORX NXT V2.0 or Concept ≥ 2.0 software. Unity Pro Hot Standby systems use 140CPU67160/67260/67261 with integrated redundancy.

Selection Tips

• Quantum, Hot Standby redundancy, ProWORX/Concept: 140CHS21000 + compatible CPUs (140CPU43412A/53414B)
• Quantum, economy Hot Standby with 140CPU11302: 140CHS41010
• Quantum, economy Hot Standby with 140CPU11303: 140CHS41020
• Quantum, Unity Pro Hot Standby: 140CPU67160/67260/67261 (integrated redundancy, no CHS kit needed)
• Always verify: PLC software platform (ProWORX/Concept vs Unity Pro), CPU model compatibility, and fiber optic cable length
• Order spare fiber optic cables: 990XCA65609 (various lengths) for maintenance