Veris Industries E31 Install - Manual (Page 8)

Z205667-0E PAGE 8 ©2012 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected] 07121
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TM
e31 INSTALLATIoN GUIDe
WIrIng
Power must be disconnected and locked out before making any wiring connections.
1. Connect 2-wire or 4-wire Modbus RS-485 daisy chain network (Figures 12 and 13).
Figure 12
Figure 13
SHIELD
RX- TX-
RX+ TX+
TX-
TX+
Master or Slave
SHLD TX+
TX+
RX+ TX–
TX-
RX-
SHIELD SHIELD
Master Slave
SHLD TX+
TX+
RX+ TX–
TX-
RX-
SHIELD
SHLD TX+
TX+
RX+ TX–
TX-
RX-
SHIELD
2-Wire 4-Wire
2-Wire Example
Figure 14
–
+
Belden 1120A or
equivalent
120 Ω terminator
on last device of
daisy chain
Not Used
WARNING: After wiring the RS-485 cable, remove all
scraps of wire or foil shield from the electrical panel.
Wire scraps coming into contact with high voltage
conductors could be DANGEROUS!
2. Mechanically secure the RS-485 cable where it enters the electrical panel.
3. Connect all RS-485 devices in a daisy-chain fashion, and properly terminate the
chain (Figure 14).
4. Shield the RS-485 cable using twisted-pair wire, such as Belden 1120A. The cable
must be voltage-rated for the installation.
5. When tightening terminals, ensure that the correct torque is applied: 0.5 to 0.6
N·m (0.37 to 0.44 ft·lb ) for connectors on main board, 0.22 to 0.26 N·m (0.16 to
0.19 ft·lb) for connectors on adapter boards (Figure 15).
–
+
Figure 15