YASKAWA Z1000U Technical Manual page 388

E.2 Connecting to a Network
u
Wiring Diagram for Multiple Connections
n RS-485 Interface
Note: Turn on DIP switch S1 on the bypass controller located at the end of the network. If DIP switch S1 is missing place an external 120 ohm
resistor across terminals TXRX+ and TXRX–. All other slave devices must have this DIP switch set to the OFF position (or if S1 is missing,
no external resistor is used).
u
Network Termination
The two ends of the P1 network line have to be terminated with a 120 ohm resistor between the TXRX+ and TXRX- signals.
The bypass has a built in termination resistor that can be enabled or disabled using DIP switch S1. If a bypass is located at the
end of a network line, enable the termination resistor by setting DIP switch S1 to the ON position. Disable the termination
resistor on all slaves that are not located on the network line end.
Note: Some bypass controllers do not have DIP switch S1. If this is the case, place an external 120 ohm resistor across the TXRX+ and TXRX-
signals if the bypass controller is at the end of a network line.
u
Recommended Cable
Specification
Cable Configuration
Gauge
Wire Lay
Shields
NEC Type
Temperature
388
COMMON
+
CONTROLLER
(customer-supplied)
-
SHLD
Figure E.2 Connection Diagram for Multiple Connections
Table E.2 APOGEE FLN Cable Specifications
Twisted Shielded Pair
18-20 AWG (Solid or Stranded)
6 twists per foot
100% foil with drain wire
UL Type CMP
60 °C or higher
Bypass Drive
TB3
Bypass
1
IG5
Control
Board A2
2
TXRX+
S1
3
TXRX-
4
SHLD
Bypass Drive
TB3
Bypass
1
IG5
Control
Board A2
2
TXRX+
S1
3
TXRX-
4
SHLD
Bypass Drive
TB3
Bypass
1
IG5
Control
Board A2
2
TXRX+
S1
3
TXRX-
4
SHLD
Description
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
OFF
OFF
ON