Schneider CDAP 116 PLC Module | 8 Inputs / 4 Relay Outputs

This PLC module handles discrete field signals for Schneider Electric automation systems. It provides reliable digital input and output functions in a compact form factor. You can deploy this unit for machine control and process monitoring applications.

Technical Specifications

Parameter	Value
Model	Schneider CDAP 116
Category	PLC Module
Number of Inputs	8 points
Input Voltage Range	10–30 VDC
Input Current per Point	6 mA typical at 24 VDC
Input Impedance	4.7 kΩ per channel
Number of Outputs	4 points
Output Type	Relay (Form A, NO)
Output Contact Rating	2 Amps at 24 VDC or 250 VAC
Output Response Time	10 ms typical (ON and OFF)
Isolation	1500 VAC (field to logic)
Internal Power Draw	150 mA from 24 VDC supply
Dimensions (W x H x D)	4.0 cm × 12.5 cm × 10.5 cm
Weight	0.38 kg (0.84 lbs)
Connector Type	One 20-pin removable terminal block
Component Count	1 main board + 8 optoisolators + 4 relays + 12 LEDs
Energy Storage	100 µF hold-up capacitor
Relay Life	100,000 operations minimum (mechanical)

Input Section Design

The Schneider CDAP 116 provides eight DC inputs for sensor and switch connections. Each channel accepts signals from 10 to 30 VDC without damage. A 6 mA current draw ensures compatibility with most industrial sensors. Green LEDs illuminate individually when an input detects an active signal.

Output Section Features

Four relay outputs drive solenoids, contactors, or indicator lamps directly. Each relay provides a Form A (normally open) contact rated at 2 Amps. You can switch either AC or DC loads up to 250 VAC. Red LEDs show the real-time status of each output channel.

Signal Isolation and Noise Immunity

Optical isolators separate every input point from the internal logic bus. Reed relays provide additional isolation between outputs and control circuits. This 1500 VAC rating prevents ground loops and electrical noise interference. Consequently, the module performs reliably near variable frequency drives and motors.

Installation and Connectivity

Mount this module vertically on standard DIN rail inside a control cabinet. A single 20-pin removable terminal block carries all field I/O signals. The unit draws 150 mA from an external 24 VDC power supply. For best results, use separate conduits for AC and DC field wiring.

Visual Status Indication

Twelve LEDs provide immediate feedback for every I/O channel. Green LEDs display the ON/OFF states of all eight inputs. Red LEDs illuminate when their corresponding relay outputs energize. Therefore, technicians can troubleshoot machine faults without any test equipment.

Energy Storage and Protection

A 100 µF capacitor maintains logic power during brief supply interruptions. Each output includes a suppression diode to protect against inductive kickback. You should add external MOVs for switching inductive AC loads. This design protects both the module and your connected field devices.

Why Choose This Module

This compact I/O module fits perfectly into space-limited control panels. Its relay outputs allow mixing AC and DC loads on the same unit. Therefore, this module works well for small conveyors, packaging machines, and assembly fixtures.