Fire-lite ACM-8RF Control Relay Module Manual do Utilizador descarregar pdf (Página 14)

2. Installation Wiring the EIA-485 Terminal Blocks

ACM-8RF PN 50362:C 03/21/01

EIA-485 Shield Not in Conduit

When the EIA-485 wiring is not in conduit, terminate the shield at the outside

of the FACP cabinet. Do not allow the shield to enter or even touch the cabinet

housing the ACM-8RFs. Between ACM-8RFs, wire-nut multiple shields

together outside of the respective enclosures. Ensure that the shield does not

touch earth ground at any junction points.

Figure 6 Terminating the Shield with No Conduit

EIA-485 - TB2 Terminals

Wire as shown below:

Note: Leave a 120 ohm ELR installed across the EIA-485 Out terminals at the last

ACM-8RF on the circuit (see below). All other ACM-8RFs should not have a resistor

installed.

Figure 7 EIA-485 Terminal Block - TB2

Multiple wiring of EIA-485 circuits

Figure 8 Wiring Multiple ACM-8RFs - EIA-485

IN (+)

IN (–)

TB2

OUT (–)

OUT (+)

ACM8RF-term2.cdr

IN (+)

IN (–)

TB2

OUT (–)

OUT (+)

ACM8RF-TB2.cdr

TB2

EIA-485 (–)

EIA-485 (+)

Host FACP

First ACM-8RF -- -- -- -- -- -- Last ACM-8RF

ACM8RF-mult.cdr

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 47 48

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Fire-lite ACM-8RF Control Relay Module Manual do Utilizador Página 14