Black Box IC109A-R2 Instalační manuál stáhnout pdf (Strana 79)

63230-216-229-B1

Installation

Communications Wiring

Terminating the Communications

Link

To ensure reliable communications, terminate the last device on a POWERLOGIC

communications link. The illustration below shows MCT-485 terminator placement

when the final device on the link is a POWERLOGIC device. If the last device is a

Sepam™ Series 80, see page 60 and page 62 for termination instructions.

If a communications link contains only a single device, it must be terminated. If a link

contains multiple devices, as in the illustration on page 74, only the last device must

be terminated.

One pair of terminating resistors is required at each end of an RS485 4-wire daisy

chain. This can be accomplished by setting the movable jumpers on the ACE959

communications interface, the switches on Black Box converter IC109A-R2, or, for

series 2000 circuit monitors, using a Multipoint Communication Adapter MCT-485.

For series 4000 circuit monitors and series 600 power meters with screw-type

terminals, use an MCTAS-485 (or an MCT-485 with a terminal block). Refer to the

instruction bulletin for the specific device for more details.

Integral jumpers on the Sepam™ ACE modules provide the ability to

select terminating resistance (Rc) or not (’Rc). See the respective ACE

module in this manual for details.

IN+

SHLD

OUT-

OUT+

IN-

MCT485

Terminator

(Class 3090)

Terminal

Block

POWERLOGIC Device

(Last Device on Link)

RS485

Terminals

Terminating a device using an MCT-485 and a terminal block

Belden 8723 Cable

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 163 164

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Black Box IC109A-R2 Instalační manuál Strana 79