ABSOLUTE ENCODERS ▶ ORDERING INFORMATION Please, select: Type  Single and multiturn absolute encoders with SSI Synchronous Serial Interface  Binary or Gray code  High resolution  Ø 58 mm  Aluminium housing The SSI protocol - Synchronous Serial Interface - is a highperformance serial communication protocol commonly used in industrial applications. SSI absolute encoders leverage this protocol to transmit position data to PLCs and other control systems with exceptional precision and reliability. ELECTRICAL & OPERATING SPECIFICATIONS Resolution/step Offering simple implementation, minimal configuration, and limited wiring, the SSI protocol is robust against noise and electromagnetic interference. MEM SSI encoders deliver outstanding performance with Power consumption SSI (RS422) 5 ÷ 30 Vdc (MEM only) or 5 ÷ 28 Vdc (MEM/MEM-V) Protection against polarity reversal 1.2 W Available in both single-turn and multi-turn versions, these encoders feature a rugged aluminum housing for durability in harsh environments. - connector C Cable outlet - lg 1 m K O-ring Output signals up to 28-bit resolution, high data transmission rates strong resistance to electrical disturbances binary or Gray code available. Connections/ O-ring Data memory Example MEM620 Square flange MEM540 Round flange, centering mask 36mm MEM540 MEM520 Round flange, centering mask 50mm MEM440 Blind hollow shaft MEM450 Blind hollow shaft & elastic support Supply voltage SSI Clock max. frequency Accuracy Interference immunity Emitted interference Connections MECHANICAL & ENVIRONMENTAL SPECIFICATIONS Materials: housing shaft MEM620/540/520 MEM440/450 aluminium stainless steel Shaft/Hollow shaft diameter Starting torque Protection degree EN 61000-6-2 EN 61000-6-4 axial or radial cable 1 m lg or axial/radial 12-pin M23 connector or axial/radial M12 connector (pig tail) * Rotating the shaft during power off shortens the encoder memory retention time Operating temperature Stocking temperature - single turn ▼ Supply voltage ▼ Connections position ▼ Shaft Ø / Hollow shaft Ø ▼ Output signals ▼ Special versions SSI X107 outlet lg. 0.3 m wth 8-pin M12 connector (pig tail) ▶Encoder MEM540-13-15B-5/30-R-8-SSI Multiturn, 13bit/step, 15 bit, binary code, 5/30 Vdc supply voltage, M23 radial connector outlet, shaft Ø 8 mm, round flange with centering mask Ø 36 mm * Max speed with O-ring mounted on the shaft: 3000 rev./min. ▶ OUTPUT SIGNALS Signals MSB: Most Significant Bit LSB: Less Significant Bit tckL: 0.5 μs min. tckH: 0.5 μs min. tit: when the tit time lag expires the encoder considers the interrogation ended Encoder MEM = tit:. 30 μs typical Encoder MEM-V= tit 16 μs typical PNP COUNT RESET INPUT Applying a high logic level to this input (5÷30 Vdc) resets the position data UP/DOWN INPUT Applying a low logic level to this input (0 V) sets the output code decreasing with the shaft rotating clockwise. The output code is increasing with shaft rotating clockwise (shaft side sight). The SSI protocol ensures data synchronization through a clock signal shared between the master and the slave (controller and encoder), determining the exact moment when each data bit is transmitted. Cable Colours The monoflop time (tIT) is the time gap required for the control device to synchronize correctly with the signal and acquire the absolute position data. It guarantees reliable synchronization and acquisition of absolute position data between the SSI encoder and the control device. The correct selection of the monoflop time is crucial for ensuring precise and reliable system operation. The MEM encoder monoflop time of 30 µs allows compatibility with most controllers on the market. For controllers that support a shorter time, the MEM-V version is availab