FCP280 RH924YA FOXBORO 现场控制处理器280 (FCP280)

可选的双电缆底板支持四个PIO通道，但提供单独的A / B总线连接器以及用于可选时间频闪输入的专用连接器。
从可选的双电缆底板到标准或紧凑型200系列FBM的现场总线连接需要单独的A / B总线电缆以及FBM底板(RH926KW)上的双“D”连接适配器。
FCP280可支持的fbm数量因所使用的fbm类型而异:
•仅与FCP280一起使用的200系列fbm – FCP280底板上的每个现场总线端口可以通过2 Mbps的HDLC现场总线连接到底板链，每条链最多可连接32个紧凑型或标准200系列fbm，最多可连接128个模块。
•与FCP280配合使用的200系列和100系列fbm(双波特配置)。
FCP280可以在一个或多个基板链中支持总共128个100系列fbm (y模块)或竞争设备(如Foxboro DCS系统迁移fbm)，剩余的128个模块限制为200系列fbm，具体取决于FCP280的现场总线负载。例如，FCP280可以支持64个100系列fbm和64个200系列fbm
FBMs(64 + 64 = 128)。为了计数目的，主fbm和扩展fbm被视为两个fbm。同样，每个PIO总线/底板端口上不允许超过64个100系列fbm。请看下面两个图。

FCP280 RH924YA

An optional dual cable baseplate is available that supports four PIO channels, but separate A versus B bus connectors are provided along with dedicated connectors for the optional Time Strobe inputs.
Fieldbus connections from the optional dual cable baseplate to standard or compact 200 Series FBMs require separate A versus B bus cables plus a dual “D” connection adapter on the FBM baseplate (RH926KW).
The number of FBMs that an FCP280 can support varies depending on the types of FBMs used:
• 200 Series FBMs exclusively used with FCP280 – Each Fieldbus port on the FCP280 baseplate can connect to a baseplate chain with up to 32 Compact or standard 200 Series FBMs per chain via the 2 Mbps HDLC fieldbus for up to 128 modules.
• 200 Series and 100 Series FBMs (dual baud configurations) used with FCP280.
The FCP280 can support a total of 128 100 Series FBMs (Y-module) or competitive devices (such as Foxboro DCS system migration FBMs) in one or more baseplate chains, with the remainder of the FCP280’s 128 module limit being 200 Series FBMs, depending on the Fieldbus loading of the FCP280. For example, an FCP280 could support 64 100 Series FBMs and 64 200 Series
FBMs (as 64 + 64 = 128). Main and expansion FBMs are considered as two FBMs for counting purposes. As well, no more than 64 100 Series FBMs are allowed on each PIO bus/baseplate port. See the next two figures.