.
Sepam
Ser.80
No. 2
Sepam
Ser.80
No. 25
ACE959
RS232/RS485
Converter
& Power Supply
TR
TR BR
ACE959
ACE959
Sepam
Ser.80
No. 1
TR
TR
RS232
CCA612
CCA612
CCA612
RS485
System
PC
RS485
Break in
Shield
110 Vac
Notes:
■ RS485 cable is 4-wire plus shield. 2-wire power (24 Vdc) is also required. Recommended cable:
❏ Belden 9841 (1 pair)
❏ Belden 9842 or 8723 (2 pair)
❏ Fileca F3644-1 (2 pair signal/1 pair power)
■ Shield is broken between two grounded shield termination points (typical). Leave the shield intact from source until just
before next
shield ground.
■ Up to 25 Sepam Series 80 relays (maximum) on daisy chain.
■ TR=Terminating Resistor
■ Two TRs are required at each end of an RS485 4-wire diasy chain (can be accomplished by setting the movable jumpers
on Sepam module ACE959, the switches on Black Box converter IC109A-R2, or, for series 2000 circuit monitors, using a
Multipoint Communications Adapter MCT-485). For series 4000 circuit monitors and series 600 power meters with a screw-type
terminal block, use an MCTAS-485 (or an MCT-485 with a terminal block). Refer to the device instruction bulletin for more details.
■ BR= Biasing Resistor
■ One BR set required per daisy chain (accomplish by setting switch on Black Box converter IC109A-R2; other converters should
be checked for configurable biasing [recommended at or near system master]).
■ One recommended RS232/RS485 Converter is Black Box IC109A-R2 (power supply separate).
■ Shields should be grounded at one end only.
Shield
Shield
Shield
Shield
RS485
RS485
Break in
Shield
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