Schneider 140CPU67261C Unity Hot Standby Processor

Product Overview

The 140CPU67261C executes Unity Pro logic in Quantum Hot Standby systems. You will find this processor in critical infrastructure like water treatment and power plants. It synchronizes its execution with a secondary backup CPU in real time. Moreover, this unit performs automatic failover when the primary processor stops. Therefore, your control system continues running without any interruption.

Technical Specifications

The table below lists all key parameters for this Hot Standby processor.

Parameter	Value / Description
Full Model	140CPU67261C
Category	Unity Hot Standby Processor
Dimensions (W x H x D)	13.0 cm x 12.5 cm x 9.0 cm (5.12 in x 4.92 in x 3.54 in)
Weight	0.72 kg (1.59 lb)
Processor Speed	133 MHz, 32-bit RISC
Program Memory	256 KB RAM (battery-backed)
Data Memory	256 KB RAM (battery-backed)
Hot Standby Port	Two fiber optic ports (primary and secondary)
Communication Ports	One RS-232, one RS-485, one USB, one Ethernet
Backplane Interface	One 80-pin DIN connector
Onboard Components	1 processor, 6 memory chips, 12 capacitors, 1 lithium battery
Energy Storage	240 mAh (lithium for memory backup)
Operating Voltage	24V DC ±20% (from backplane)
Current Draw	0.35 A typical, 0.55 A maximum
Program Capacity	4,096 function blocks
Execution Speed	0.2 µs per boolean instruction
Failover Time	< 50 ms typical
Status LEDs	Run, Stop, Primary, Secondary, Fault, Battery
Mounting	Quantum rack slot

The 140CPU67261C uses a lithium battery to retain program memory. Therefore, you must replace this battery every 2 to 3 years. Use the fiber optic ports to connect primary and secondary processors. Meanwhile, the Ethernet port handles SCADA communications and diagnostics.

Installation and Compatibility

You can mount this processor in any Quantum rack slot. Insert the 140CPU67261C into the chosen slot until the backplane locks. Then connect the fiber optic cable between both processors. Always install the secondary CPU within 100 meters of the primary unit.

This processor runs all Unity Pro programs from older 140CPU67 series models. It also supports all Quantum I/O modules without modification. The 140CPU67261C replaces 140CPU67261 models with faster failover time.

Environmental and Safety Data

The 140CPU67261C operates from 0°C to +60°C. It withstands 2g vibration per IEC 60068-2-6 testing. The circuit board has a full conformal coating. Consequently, you can use this processor in harsh industrial environments. Replace the battery immediately when the LED indicates low voltage.