在 SIS 系统中为了提高可靠性，可以配置冗余历史数据库 服务器，将两台互为冗余的历史数据服务器通过双网冗 余星形拓扑结构以太网与电厂各生产系统进行通讯，读 取所有子系统的信息，形成 SIS 的历史数据数据库。
LOT OF 13 FUJI ELECTRIC BZ0WUABL AUXILIARY CONTACTS
HUBBELL HBL316R4W RECEPTACLE 16A 110VAC 2POLE NIB
BANNER 17626 PHOTOELECTRIC MULTI-BEAM NIB
PHOENIX CONTACT CM 90-PS-120AC/24D??C/2 POWER SUPPLY 293
ALLEN BRADLEY 1492-GH050 CIRCUIT BREAKER
POTTER & BRUMFIELD R10-E2520-2 RELAY R10E25202
NIB KEYENCE H-302 PROXIMITY SWITCH H302
NIB TRACO SXI100-24S POWER SUPPLY
FACTS ENGINEERING F3-16ND3F INPUT MODULE F316ND3F NIB
SMC SV2200R-5FU DOUBLE SOLENOID VALVE SV2200R5FU
NIB KOGANEI MEDT14 VACUUM ENJECTOR
JOSLYN CLARK 7001-7140-11 CONTACTOR 7001714011 40AMP 50
BANNER BT26SM900 FIBER OPTIC CABLE
ARO INGERSOLL-RAND A211SS-O24-D-G 1/8 AIR VALVE A211SS-
ARO INGERSOLL-RAND A212SS-120-A-G 1/4 AIR VALVE A212SS-
