GE IC660BLM506 Bus Terminating Resistor

The IC660BLM506 functions as a bus terminating resistor for GE Genius LAN systems. This device prevents signal reflections at the ends of the communication cable. It ensures proper data transmission across the entire Genius network. Therefore, this resistor is essential for reliable distributed I/O communication.

Technical Specifications

We engineered this terminating resistor for industrial fieldbus applications. Its compact design mounts directly onto the terminal strip of Genius blocks. Moreover, the unit provides the correct impedance match for the twisted-pair cable.

Parameter	Specification
Dimensions (L x W x H)	2.5 x 1.2 x 0.8 inches (64 x 30 x 20 mm)
Weight	0.05 kg (0.11 lbs)
Resistance Value	100 ohms ±5%
Power Rating	0.25 watt
Temperature Coefficient	±100 ppm/°C
Connection Type	Screw terminal block with two positions
Housing Material	Molded thermoplastic
Wire Range	22-14 AWG
Operating Temperature	-40°C to +85°C (-40°F to +185°F)

Electrical Characteristics

The IC660BLM500 provides a precise 100 ohm termination for Genius bus cables. This resistance matches the characteristic impedance of the twisted shielded pair. The unit dissipates minimal power under normal bus operating conditions. Consequently, it does not generate significant heat or require any cooling.

Installation Locations

Place this terminating resistor at each physical end of the Genius bus segment. The main CPU rack typically requires one terminator at its bus connection. The farthest Genius block on the segment needs the second terminator. Therefore, a simple daisy-chain network uses exactly two terminators total.

Network Performance Impact

The IC660BLM506 eliminates signal echoes that cause data corruption. Without proper termination, long cable runs produce standing waves and reflections. These reflections create communication errors and intermittent device dropouts. Hence, this terminator directly improves network reliability and data integrity.

Mechanical Design and Mounting

This terminating resistor features a compact molded housing for durability. Two screw terminals accept standard field wiring from 22 to 14 AWG. The unit mounts directly onto the Genius block’s terminal strip. No additional hardware or tools are necessary for installation.

Energy Storage and Power Handling

The IC660BLM506 contains no battery or energy storage components whatsoever. It operates as a purely passive electrical device on the network. The resistor dissipates only the energy from the bus communication signals. Thus, it has no active components that can fail over time.

Installation Guidance

Mount the IC660BLM506 onto the terminal strip of a Genius block. Connect one wire to the A terminal of the bus connection. Connect the second wire to the B terminal of the same bus port. Tighten the screws to 0.5 Nm of torque for reliable contact. Install only two terminators per bus segment for proper operation.