GE IC660ELD021 I/O Block

Technical Specifications

Parameter	Value
Brand	GE
Model	IC660ELD021
Category	I/O Block
Weight	2.45 lbs (1.11 kg)
Dimensions	10.5 x 3.8 x 2.4 inches
Enclosure Rating	IP20
Component Count	184 discrete components
Input Channels	16 DC inputs
Input Voltage Range	12-24V DC
Output Channels	16 DC outputs
Output Current	0.5A per channel
Isolation	1500V AC optical
Onboard Memory	8KB EEPROM
Communication	Genius bus interface
Energy Storage	6 x 100µF capacitors
Operating Voltage	24V DC ±20%

Physical Construction and Component Layout

This IC660ELD021 I/O block measures 10.5 inches in length. Its width reaches 3.8 inches with a height of 2.4 inches. The total weight comes to approximately 2.45 pounds. Manufacturers placed 184 discrete components inside this rugged housing. These components include optocouplers, transistors, resistors, and logic ICs. The IP20 enclosure protects against dust and accidental contact.

Input Channels and Signal Processing

IC660ELD021 provides 16 DC input channels for field devices. Each input accepts voltages from 12V DC up to 24V DC. The input circuitry includes debounce filtering for noisy signals. A green LED illuminates when each input receives power. Optical isolation separates the field wiring from internal logic. This isolation withstands 1500V AC for enhanced safety. Consequently, you can connect sensors directly without external relays.

Output Channels and Drive Capability

The I/O block delivers 16 DC sinking outputs for load control. Each output drives up to 0.5 amps continuously. Outputs can switch solenoids, indicator lamps, or small relays. Short-circuit protection prevents damage from wiring faults. An amber LED shows the status of every output channel. The IC660ELD021 communicates over the Genius bus interface. This bus connects to GE PLC systems without extra cabling.

Energy Storage and Power Requirements

IC660ELD021 integrates six 100µF electrolytic capacitors on the input. These capacitors absorb voltage dips from the 24V DC supply. The unit operates from 24V DC with a tolerance of ±20%. For non-volatile storage, 8KB of EEPROM holds configuration data. This memory retains settings even after power loss. The block operates reliably from 0°C to 60°C ambient. Therefore, this I/O block suits factory floor installation near machinery.