The only option for the ECS-300 encoder module (that I am aware of) are built/used only for serial protocol, these being:
BiSS, EnDat2.2, and 1S (R88M-1L[]/[]-1M[] Motor built-in encoder). Don’t believe there is an option for digital quadrature option as this module was created specifically for the additional serial protocols (DATA+, DATA-, CLK+, CLK-) that were not originally included into the DSPGATE3 ASIC units.
In general, the connector arrangement for CK3W-AX1313[], CK3W-AX1414[], CK3W-AX1515[] are able to use the digital quadrature option. As for the amplifier options of the CK3W-AX1414 is for filtered PWM and CK3W-AX1515 for Analog (True Dac).
The following serial protocols are built into the DSPGATE3 ASIC for the Axis Interface Module Units:
0: No serial protocol (quadrature)
1: SPI
2: SSI
3: Heidenhain EnDat2.1/2.2
4: Stegmann Hiperface
5: Yaskawa Sigma I
6: Yaskawa Sigma II/III
7: Tamagawa
8: Panasonic
9: Mitutoyo
10: Kawasaki