BECS BECSys3 - B - 15: RS485 Network; B - 15.1: Becsys RCM; B - 16: Fuses

Page 12
www.becs.com 9487 Dielman Rock Island Ind Dr, St. Louis, MO 63132
Installation and Technical Manual Rev: H10
B – 15: RS485 Network
B – 15.1: BECSys RCM
If you have ordered a BECSys RCM, or the site has
a BECSys RCM already installed, you may connect
your BECSys3 to it. The BECSys RCM provides
data logging and remote access of up to 32
BECSys3 controllers per site.
Recommended wire: 22 gauge shielded twisted pair
(1 pair: 2 conductors + shield).
For outdoor use, use NEC type PLTC.
For indoor use, use NEC type CMG general, CMR
riser (through floors), or CMP plenum as required
by the local wiring code.
Connect the wires to CN4 in the cover of the unit.
There are two RS485 terminal blocks to allow daisy
chaining of units. It doesn’t matter which
connector you use – whichever is easiest. For each
unit, wire as follows:
From BECSys3
To BECSys RCM
A
A
B
B
SH
Shield
Refer to the BECSys RCM manual (included with
your BECSys RCM) for more information on how
to configure the network.
B – 16: Fuses
115VAC Model (F4):
¼ Amp 250V Time Lag Fuse (¼” x 1¼”)
BECS Part Number: 8140086
230VAC Model (F4):
¼ Amp 250V Time Lag Fuse (¼” x 1¼”)
BECS Part Number: 8140086
Relay Fuses (F1 – F3):
3 Amp 250V Time Lag Fuse (¼” x 1¼”)
BECS Part Number: 9140088
RS485 Fuse (F1 CPU Board):
¼ Amp 250V Time Lag Microfuse (5.08mm)
BECS Part Number: 8140059