Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 32)

YASKAWA TOEP YAIZ1D01A Z1000U Matrix Bypass Quick Start Procedure
Z1000U Bypass
Quick Start Procedure
Page 32
of 37
This section describes basic steps required to confi gure and monitor the drive for BACnet
communications.
The Z1000U Bypass can be monitored and controlled by a controller on a Building Automation and Control network (BACnet) using RS-
485 connection and MS/TP (Master-Slave/Token-Passing) protocol. The Bypass conforms to the BACnet application specifi c controller
(B-ASC) device profi le. BACnet MS/TP connection is made to the bypass control board terminal TB3. Parameters and monitors for both
the Z1000U drive and the bypass controller are made accessible by this single BACnet connection.
13.1 Connect BACnet wiring to Z1000U Bypass.
With the power shut off, connect the master controller communications cable to the Z1000U Bypass Control Board, terminal TB3.
TB3
4
3
2
1 SHLD
TXRX-
TXRX+
IG5
Shield
Transmit/Receive (-)
Transmit/Receive (+)
Isolated Ground Reference
13.2 Connect RS-485 network wiring.
Connect the shield drain wire to earth ground at the controller side only to avoid ground loops.The shield drain wire should be insulated
from contacting other components or ground at all other network locations. Alternate shield grounding topologies may be used if
common mode noise issues are suspected.
NOTE: The isolated ground (IG5) connection is optional but strongly recommended to avoid noise issues. Yaskawa recommends using
Belden cable 3106A or equivalent for BACnet operation.
CONTROLLER
(customer-supplied)
1
2
3
4
+
-
SHLD
Bypass Drive
S1
OFF
TB3
SHLD
TXRX-
TXRX+
IG5
1
2
3
4
Bypass Drive
S1
OFF
TB3
SHLD
TXRX-
TXRX+
IG5
ON
1
2
3
4
Bypass Drive
S1
SHLD
TXRX-
TXRX+
IG5
Bypass
Control
Board A2
Bypass
Control
Board A2
Bypass
Control
Board A2
TB3
COMMON

BACnet Communications (OPTIONAL)
13
STEP