SSI Through-Hole Absolute Encoder SAS/M90

Utilizing high-precision magnetic induction technology, we provide single-turn and multi-turn encoder solutions.
Supports SSI interface with clock frequencies up to 2 MHz, enabling high-speed, precise data transmission.
Additional TTL/HTL output signals can be added to meet diverse control requirements.
Single-turn resolution reaches up to 21 bits, while multi-turn resolution achieves 14 bits, ensuring high-precision measurement.
Featuring exceptional impact and vibration resistance, with an IP68 protection rating, it is designed to withstand extreme environments.
Built-in reverse short-circuit and short-circuit protection effectively minimizes the impact of installation errors on the encoder.

Product Specifications (SSI Signal Output Series)

Parameter Name	SAS/M90A (Through-Hole Type)	SAS/M90B (Through-Hole Type)
Spindle Dimensions	Ø 10, 12, 14, 15, 16, 20, 25, 28mm (Customizable for all sizes up to 28mm)
Housing Material	Aluminum (optional stainless steel housing)
Signal Output Interface	SSI; SSI+ Incremental
Maximum Response Frequency	2 MHz
Startup time	< 1s
Output Driver	SSI (RS422) / Incremental (RS422)
Function	Single-turn or multi-turn
Power supply voltage	Standard 10–30 VDC
Single-turn resolution	Standard: 12-bit 4096, 13-bit 8192, 16-bit 65536, 18-bit 262144, maximum 21-bit
Number of laps	1 revolution (single-revolution type), multi-revolution standard 12 digits 4096 revolutions, multi-revolution maximum selectable 14 digits 16384 revolutions
Power consumption	≤ 1.5 W
Interface Cycle Time	≥ 16 μs
Manual Function	Rotation direction, reset
Encoding	Gray code or binary code
Clock Input/Speed	Clock input: RS422; Clock speed: 100 kHz–2 MHz
Safety Protection	Reverse polarity protection: Yes; Short-circuit protection: Yes; Lightning and static surge protection: Yes
Physical Properties	Maximum speed: 6000 rpm	Spindle load: Radial 200N, Axial 100N
Environmental Indicators	Protection rating: IP65 or IP68; Starting torque: < 0.01Nm
Temperature Range	Operating Temperature: -30°C to 85°C (customizable to -40°C to 85°C); Storage Temperature: -40°C to 100°C
Mechanical strength	Impact resistance: 1000 m/s², 6 ms (100g); Vibration resistance: 20g
Connection/Wiring Method	Connectors: Shielded cable, M12-5/8-pin, M23-12-pin male; Cable exit: Radial side exit, axial rear exit
Optional items	Incremental output TTL/RS422, HTL/push-pull
Incremental signal	A+ A- B+ B- Z+ Z-
Pulse count	1 to 4096 pulses selectable (standard options: 1024, 2048, and 4096)

Wiring Definitions

Signal	GND	UB	C+	C-	D+	D-	SET	DIR	⏚
M23 connector, 12-pin	1	2	3	4	5	6	7	8	-
Wire color	白	棕	绿	黄	灰	粉	蓝	黑	Shield

Signal	A	A-	B	B-	Z	Z-
M23 connector, 12-pin	9	10	11	12	-	-
Wire color	红	dust	紫	Red and Blue	-	-
Explanation	1. When selecting the M23/12-core counterclockwise socket, only A and B signals are provided by default; full signals are optional. 2. Incremental default is 1024 lines.

Top view of pin connector block

Connector Type	5-pin M12 connector	8-pin M12 connector	12-pin M23 connector
Top View of Connector Housing

Installation Dimension Drawing

SAS/M90A

SAS/M90B