Schneider 140XCA71709 Backplane Expander Cable

This cable connects two Modicon Quantum backplanes for system expansion. It extends the X-bus between the primary rack and a secondary rack. Therefore, it increases total I/O capacity for large automation installations.

Technical Specifications of Schneider 140XCA71709

The Schneider 140XCA71709 measures 120.0 cm in total assembled length. Its cable weight equals approximately 0.25 kg for flexible routing within cabinets. Two 48-pin male connectors terminate each end of this expander cable. Additionally, the cable contains 48 individually shielded conductors for signal integrity.

Parameter	Specification
Brand	Schneider Electric
Full Model	140XCA71709
Category	Backplane Expander Cable (X-Bus)
Total Length	120.0 cm (47.24 inches / 3.94 feet)
Cable Weight	0.25 kg (0.55 lbs)
Connector Type (Each End)	1 x 48-pin Male (Standard Quantum Backplane)
Connector Material	Glass-Filled Polyester with Gold-Plated Pins
Number of Conductors	48 Stranded Tinned Copper (28 AWG)
Conductor Shielding	Individual Foil Shielding per Conductor + Overall Braid
Impedance	100 Ω (Differential Pairs)
Capacitance	50 pF per Meter (Conductor to Shield)
Maximum Bend Radius	5.0 cm (2.0 inches) for Static Installation
Insulation Material	PVC (Polyvinyl Chloride)
Outer Jacket Material	Gray PVC (Flame Retardant)
Jacket Outer Diameter	1.2 cm (0.47 inches)
Connector Latches	Screw-Lock Type (M3 Threads)
Maximum Rack Separation	100 cm (39.4 inches) between Backplanes
X-Bus Protocol	Proprietary Schneider Quantum Bus
Maximum Data Rate	10 Mbps (Limited by Backplane, Not Cable)
On-Board Components	None (Passive Copper Cable Assembly)
Energy Storage	None (Passive Component)
Maximum Operating Voltage	30 VDC (Signal Lines)
Maximum Current per Pin	1 A (All 48 Pins)
Operating Temperature	0°C to +60°C (32°F to 140°F)
Storage Temperature	-25°C to +85°C (-13°F to 185°F)
Flammability Rating	UL 94 V-0 (Connectors) + VW-1 (Cable Jacket)

Cable Construction and Signal Isolation

The Schneider 140XCA71709 uses 48 individually shielded conductors for robust signal transmission. Foil shielding on each wire prevents crosstalk between adjacent X-bus signals. An overall braided shield provides additional protection against external electromagnetic interference. Consequently, this cable maintains data integrity even in electrically noisy industrial environments.

Physical Layout and Rack Expansion

You will find screw-lock connectors at both ends of this expander cable. These connectors secure firmly to the Quantum backplane X-bus ports. The cable allows up to 100 cm of separation between two backplanes. Thus, you can place secondary I/O racks remotely from the main CPU rack.

Installation and Routing Guidelines

This cable requires a minimum bend radius of 5.0 cm for safe installation. Do not kink or crush the cable during cabinet routing. Secure the cable using plastic ties at regular intervals. The gray PVC jacket resists oil, moisture, and industrial chemicals. Therefore, the Schneider 140XCA71709 suits harsh factory floor environments.