Ssi Communication Specification; Ssi Communication Circuit Diagram - NSD ABSOCODER NCV-220HSSILC Specifications & Instruction Manual

3-1-5. SSI communication specification

Items
Interface
Communication format
Numbers of channels
Communication signal
Code
Data length
Monoflop time
Transmission speed: cable length

3-1-6. SSI communication circuit diagram

SSI converter
SN75ALS1178
SN75ALS1178
* Method of shield grounding
The shield of the cable should be grounded (ground resistance of 100 ohm or less) at both sides of SSI
converter and host controller.
SSI (Synchronized Serial Interface)
RS-422 standard
2 channels (per sensor axis)
DATA+, DATA-, CLK+, CLK-
Gray / binary
25-bit
20μs
1MHz: 20m, 500kHz: 60m, 250kHz: 160m, 125kHz: 320m
8, 10
7, 9
18, 20
17, 19
6
SG 16
GND (ground resistance
of 100 ohm or less)
Specifications
CLK＋
CLK－
DATA＋
DATA－
Shield
GND (ground resistance
of 100 ohm or less)
9
Host controller
0V