Mercury 2+, Руководство пользователя

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Mercury 2+ Operator Terminal User Manual Page 17 of 82 2019r0
Power and communication connections to the Mercury 2+
Terminal are made via the R507/R507A Intrinsically Safe interface
module. The IS interface module should be installed in a safe area.
The cable screen should be connected to J5 pin 5 within the
Mercury 2+.
▲ WARNING Power must be disconnected before connecting
or inspecting the IS interface module.
No Intrinsically Safe earth is required as the unit is Galvanically
isolated.
Mount the IS interface module on to a DIN standard (DIN 46277),
35mm transverse symmetrical rail.
For the complete inter­connection diagram see Appendix F.
The inter­connection cable between the safe area IS Interface
Module and the hazard area Mercury 2+ Terminal requires four
cores, which may be either two twisted pairs or a quad.
Where a quad is used, diagonally opposite cores should be paired
to reduce any communications cross­talk.
Where twisted pairs are used, one pair should be used for
TX1+/TX2+, and the other pair for RX1­/RX2­.
The wiring schedule for the IS interface module is listed in
Appendix D.
Hazardous Area
Connections
Connecting the I.S.
Interface Module
Connections