Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 107)

3.7 External Interlock
Systems that may be affected during drive fault conditions should be interlocked with the drive fault output and ready signal.
u Annunciation Contact Outputs
Annunciation contacts for customer use are provided at terminal blocks TB1 as indicated in Table 3.17 . Annunciation contacts
are used to indicate the status of bypass operation. Contacts are rated for 2 Amps, 24 Vdc/120 Vac +/- 15% maximum.
Table 3.17 Annunciation Contact Details
Function <1> Name Terminal Block Terminals Type
Motor Run DO-7 TB1 1-2-3 Form C
Hand Mode DO-8 TB1 4-5-6 Form C
Auto Mode DO-9 TB1 7-8-9 Form C
System Fault DO-10 TB1 10-11-12 Form C
<1> Default settings are shown. Set parameters Z2-23 to Z2-26 to choose other functions.
The function of output relays DO-7 through DO-10 may be reprogrammed via bypass parameters Z2-23 through Z2-26. These
form C dry contact relays are for customer use in annunciation to building automation systems (BAS) or other circuits. Each
contact is rated for 2 amps at 120 Vac.
Refer to Z2-01 to Z2-08: Digital Input 1 to 8 Function Select on page 216 for descriptions of the programmable functions
of annunciation contacts.
u Building Automation System Run/Stop Circuit
DI-1 (TB2-1 by default setting in Z2-01) is available to connect the normally open (N.O.) Run/Stop contact from a BAS or
other remote controller for auto mode control.
These terminals must have contact closure for the motor to run in AUTO mode.
u Safety Interlock Circuit
DI-2 (TB2-2 by default setting in Z2-02) is provided to connect safety devices in a normally-closed series circuit, such as:
freeze up thermostats, smoke/fire sensors, high pressure limits, temperature limits or vibration detectors.
The HOA keypad will display the status “Safety Open”, and trigger a Safety Open fault if a N.C. safety circuit is not closed
between DI-2 and IG24 (TB2-10) on PCB A2 at power-up with a Run command in HAND or AUTO mode. An open circuit
between DI-2 and IG24 will prevent bypass operation.
Take one of the following steps to ensure proper operation prior to startup:
1.
Install a N.C. safety circuit between DI-2 and IG24 on PCB A2.
2.
Install a jumper between DI-2 and IG24 (on PCB A2. A normally-closed safety circuit may also be used in place of
this jumper.
u Building Automation System Interlock Circuit (Drive and Bypass Enable Input)
The HOA keypad will display the status “INTRLOCK OPN” and possibly a “BAS Ilock-open” alarm or “BAS Ilock TO”
fault if a N.C. safety circuit is not closed between DI-3 (TB2-3 by default setting of Z2-03) and IG24 on PCB A2 at power-
up with a Run command in HAND or AUTO mode. An open circuit between TB2-3 and IG24 (TB2-10) will prevent bypass
operation.
Take one of the following steps to ensure proper operation prior to startup:
1.
Install a N.C. BAS Interlock Circuit/Damper Interlock between DI-3 and IG24 on PCB A2.
2.
Install a jumper between DI-3 and IG24 on PCB A2. A normally-closed BAS interlock may also be used in place of
this jumper.
3.7 External Interlock
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual 107
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Electrical Installation