Installation Manual Digital Input / Output Relay Interface • Thank you very much for purchasing this TOSHIBA / Carrier Digital Input / Output Relay Interface. • Please read this manual carefully beforehand for proper installation of the relay interface. Contents 1 Precautions for safety .
Installation Manual Digital Input / Output Relay Interface Precautions for safety • Read these “Precautions for Safety” carefully before installation. • The precautions described below include important items regarding safety. Observe them without fail. Understand the following details (indications and symbols) before reading the body text, and follow the instructions.
Installation Manual Digital Input / Output Relay Interface Introduction Applications / functions / specifications Applications • The Digital Input / Output Relay Interface is used to control air conditioners by interlocking them with electric lock signals, and to transmit air conditioner failures to other devices. Functions •...
Installation Manual Digital Input / Output Relay Interface Before installation Check the following package contents. Item Quantity Remarks Digital Input / Output Relay Interface Installation Manual Screw 5/32” x 0.47” (M4 x 12 mm) tapping screws Pin terminal Cable clamp Use the following wiring materials to connect the signal lines and power lines.
Installation Manual Digital Input / Output Relay Interface Connection of power cables / earth wires / communication cables CAUTION • The RS-485 communication cable has polarity. Connect A to A, and B to B. If connected with incorrect polarity, the unit will not work.
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Installation Manual Digital Input / Output Relay Interface Wiring connection The following describes a connection example of Digital Input / Output Relay Interface. CAUTION If an inductive load (relay coil) or a bulb is connected, a surge voltage or rush current will be generated. Take adequate measures against surge voltage or rush current.
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Installation Manual Digital Input / Output Relay Interface Connection diagram Smart BMS The RS-485 signal Manager wire has polarity A and B. Be careful when connecting the wire. Input contact 1 Input contact 2 Input contact 3 Input contact 4 Input contact 5 The RS-485 communication cable must Input contact 6...
Installation Manual Digital Input / Output Relay Interface Test run Before starting test run Turn on the power of the Digital Input / Output Relay Interface after all cable connections and settings are completed. Turn on power of the air conditioning control system. ...
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Installation Manual Digital Input / Output Relay Interface Checking the RS-485 communication status Use LED2 for checking the RS-485 communication status. When RS-485 communication with Smart BMS Manager is normal, LED2 will blink. Normal operation Abnormal operation LED1 Power indicator LED2 RS-485 communication status indicator Blinking...