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Schneider Electric 140CHS21000 Modicon Quantum Hot Standby Kit

The Schneider Electric 140CHS21000, also cataloged as the 140CHS21000 Hot Standby Kit, operates as a dedicated hardware component for redundant controller switching within Modicon Quantum automation platforms. It executes deterministic data synchronization between primary and secondary processors via backplane bus communication.

Hardware Specifications

Parameter	Specification
Model Brand	Schneider Electric
Origin	France
Weight	2.56 lbs (1.16 kg)
Dimensions	Not specified
Operating Temp	0 degC to 60 degC
Power Consumption	15 W
Power Supply Voltage	24 VDC
Current	0.5 A
Transfer Time	< 100 ms
Status Indicators	LED for status, fault, diagnostics
Fieldbus Compatibility	Profibus DP, Modbus
Event Logging	Logs failure events
Certification	CE, UL, RoHS compliant
Mounting	DIN rail
Communication Ports	Ethernet, RS-232, RS-485
Protection	Overcurrent, overvoltage, short-circuit

Backplane Bus Communication Velocity and Firmware Flash Compatibility

The module utilizes the Modicon Quantum backplane bus to transfer process image tables with deterministic latency under 100 ms during redundancy switchover. Firmware flash compatibility aligns strictly with Quantum CPU firmware revisions; mismatched versions will inhibit synchronization. Licensing keys embedded in non-volatile memory validate authorized operation within the rack configuration.

Frequently Asked Questions

Q: Does the 140CHS21000 support hot-swapping without interrupting the secondary processor?

A: No. Hot-swap is not supported; power-down and controlled removal are required to prevent backplane communication errors.

Q: What is the maximum allowable voltage variation on the 24 VDC supply before triggering a fault?

A: The module tolerates 24 VDC +/-10% within operational temperature range. Exceeding this invokes overvoltage protection.

Q: Is cross-firmware loading permitted between different series of Quantum CPUs?

A: No. Firmware images must match both CPU series and redundancy kit hardware revision.

Field Installation Guidelines

Mount the module on a grounded DIN rail compatible with Quantum racks. Maintain separation from high-voltage wiring to minimize EMI coupling. Shielded twisted-pair cables must be used for all communication links, with shield termination at the rack ground point only. Verify backplane seating by applying even pressure until the locking levers engage fully. Confirm LED status sequence before enabling redundant operation.

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