SKF Multilog On-Line System IMx-M, Руководство пользователя

Страница: 47 / 313

Protection
Relays
SKF Multilog On-Line System IMx-M 2 - 27
User Manual

First Out will trigger on analog channels, Gap and calculated combined channels.
–
First out will NOT be set if a channel is already in danger state when the
channel or slot is armed.
–
When
actioning a ‘Rese
t of latching
functions’, the first out indication will be
reset but will not move to any other channel that is already in danger state.
Only a channel entering danger state can become ‘First out’.
Relays
Each IMx-M rack can be fitted with a maximum of three relay modules. Each relay
module contains 32 separate relays, consisting of 28 single pole, double throw (SPDT)
and four double pole, double throw (DPDT) relays. This means that each IMx-M rack
can have up to a maximum of 96 relays available for configuration and use.
All relays of all relay modules throughout the IMx-M rack have access to the alarm
status of all MCUs of all the protection modules in the rack.
The management of relay module configuration, access to the circuit fault status report
and realization of slot disarm are done slot wise.

Relay module 1 is associated with slot1 (accessed through protection module 1)

Relay module 2 is associated with slot2 (accessed through protection module 2)

Relay module 3 is associated with slot3 (accessed through protection module 3)
For information on how to configure relay modules see Configuring a Relay Module .
Important - When relays are configured to trigger on channels in more than
one protection module (so called "shared relays") the following are important to
consider:

Shared relays are only recommended to use for semi critical machines. It is
NOT for critical machines.

In order to engage disarm when there are shared relays, it is strongly
recommended always to use rack disarm input to disarm the entire rack at
once.

Upon a configuration or firmware update, all protection modules that depend
on the shared relays will be affected.

Circuit faults affecting shared relays will only be reported by the associated
protection module. Be sure to evaluate the circuit faults of the relay module
and other protection modules that utilize the shared relays.

Circuit faults related to internal communication of a protection module utilizing
shared relays will also be reported by the associated protection module (the
relay module will indicate circuit fault if it does not receive data from the
associated protection module).

Latching relays always need to be reset from the associated protection module.
Note that a relay that is latched in alarm at the point of disarm (the channel at
this point is OK), will still change state if a latching reset is issued.