Nor-Cal SDC15 Controller - Manual (Page 39)

Chapter 4. WIRING
4 - 1 Wiring
4-1
WARNING
Before wiring, or removing/mounting the SDC15, be sure to turn the power
OFF.
Failure to do so might cause electric shock.
Do not touch electrically charged parts such as the power terminals.
Doing so might cause electric shock.
CAUTION
Wire the SDC15 properly according to predetermined standards.
Also wire the SDC15 using specified power leads according to recognized
installation methods.
Failure to do so might cause electric shock, fire or faulty operation.
Do not allow lead clippings, chips or water to enter the controller case.
Doing so might cause fire or faulty operation.
Firmly tighten the terminal screws at the torque listed in the specifications.
Insufficient tightening of terminal screws might cause electric shock or fire.
Do not use unused terminals on the SDC15 as relay terminals.
Doing so might cause electric shock, fire, or faulty operation.
We recommend attaching the terminal cover (sold separately) after wiring the
SDC15.
Failure to do so might cause electric shock, fire, or faulty operation.
Use the relays within the recommended life.
Failure to do so might cause fire or faulty operation.
Use Yamatake Corporation's "SURGENON" if there is the risk of power
surges caused by lightning.
Doing so might cause fire or faulty operation.
Do not make incorrect connections. If the cables are connected incorrectly,
this might cause the unit to malfunction.
The controller does not function for approximately 6 sec. after the power has
been turned ON. Great care should be taken when the relay output from the
controller is used as interlock signals.
The part between the control output 1 and control output 2 is not isolated.
When necessary, use an appropriate isolator.
Do not connect multiple loader cables to multiple units from one personal
computer. The current coming from other circuits might cause the PV value
indication error to occur.
Do not connect any terminating resistor to both ends of the communication
path when performing the RS-485 wiring. Doing so might cause the
communication to fail.
Always mount a switch for shut-down of the main power of this unit in an
easily accessible area of the operator when performing electric wiring of this
unit. Additionally, connect a slow-action type (T) fuse having a rated current
of 0.2A and rated voltage of 250V to the wiring for the instrument power
supply of the AC power supply model. (IEC127)