6DD1611-0AE0，西门子，西门子通讯板，SIMADYN D MAILBOX MM21 L-BUS , 64KB RAM

6DD1611-0AD0，西门子，西门子通讯板，SIMADYN D MAILBOX MM11 L- AND C-BUS , EACH 64KB RAM

6DD1682-0CH1，西门子，西门子通讯板，SIMATIC TDC SUBRACK UR5213 21 SLOTS 95 V - 255 V INPUT VOLTAGE INTEGRATED FAN NOT FOR GDM 3-ROW FEMALE CONNECTOR

6DD1682-0CH0，西门子，西门子通讯板，SIMATIC TDC SUBRACK UR5213 21 SLOTS 95 V - 255 V INPUT VOLTAGE INTEGRATED FAN FOR GDM 5-ROW FEMALE CONNECTOR

6DD1682-0CG0，西门子，西门子通讯板，SIMADYN D MODULE SUBRACK SRT400 WITH POWER SUPPLY 115/230V AC FOR T400 AND COMMBOARD CB.. 2 FREE SLOTS

6DD1610-0AH5，西门子，西门子通讯板，SIMADYN D MEMORY SUBMODULE MS55 BATTERY: CR2325, 3 V, LITHIUM