Flowserve MX-100 Field Unit Manuel d'utilisateur télécharger pdf (Page 6)

MX/DDC-100 Field Unit Installation and Maintenance FCD LMENIM2329-01 – 03/11

1.4 User Knowledge

It is recommended that the user read this manual in its entirety before the DDC-100 equipped actuator is installed and

operated.

The user needs to have a fundamental knowledge of electronics and microprocessor concepts. An understanding of

valve actuators and digital control systems is beneﬁcial to the ﬁeld unit user.

1.5 DDC-100 System Capabilities and Features

Limitorque’s distributed digital control (DDC) valve control network supports up to 250 actuators over a single

twisted-pair cable using Modbus™ protocol. MX actuators and other devices can be accessed from a control room

for integration with a plant asset management (PAM) system, distributed control system (DCS), programmable

logic controller (PLC), or personal computer (PC) based network. The DDC-100 system consists of a host system,

controller, network, and ﬁeld units. A typical DDC-100 system is shown in Figure 1.1.

Figure 1.1 – Typical DDC-100 system with or without a Master Station II

250

Host controller

Optional

Master

Station

Network

RS-485

MX ﬁeld

units

(up to 250)

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Flowserve MX-100 Field Unit Manuel d'utilisateur Page 6