Product Details
Product Description
Product Description
Brand: METSO
Type:PDP403
Origin: the United States
Warranty: 365 days
Colour: new/used
Shipping method: Courier delivery
The control network connectivity is obtained by two built in IEEE802.3 Ethernet channels on PM891. PM891 also provides a communication expansion bus (CEX-Bus) to which a number of expansion modules can be connected. These modules offers connectivity to a wide range of field bus and I/O systems. In case of a redundant pair, both PM891s are connected to the same CEX-Bus and one of them can control the modules. Physically, the PM891 Processor Unit consists of: • Connector for power supply and status signals (L+, L-, SA, SB). • DB25 connector for Electrical CEX-Bus. • External battery connector. • RJ45 connectors for the two Ethernet channels. • One Com port. • Optical Modulebus connector for connection to a maximum of seven clusters, with 12 non-redundant or six redundant modules (that is, 7x12 = 84 modules). • Connectors for Redundancy Link. • SD (Secure Digital) memory connector. • LEDs. • Pushbutton reset switch.
PM891/PM86x/TP830 Processor Unit – Redundancy Processor unit redundancy is available for PM861, PM864, PM865, PM866, and PM891. In this case, the controller contains two processor units, each including memory for system and application software. One unit is acting as primary, the other is backup (hot stand-by). The primary processor unit controls the process. The backup stands by, ready to take over in case of a fault in the primary. The changeover is done bumplessly and in less than 10 ms. During the changeover, the process outputs are frozen.
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