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47DAC OPERATING MANUAL EM-9518-B Rev.4
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I/O OPTIONS
Alarm output (relay contact)
Rated load
250 V AC @ 3 A (cos ø = 1)
30 V DC @ 3 A (resistive load)
Maximum switching
voltage
250 V AC, 30 V DC
Maximum switching
power
750 VA, 90 W (resistive load)
Minimum load
5 V DC @ 10 mA
Mechanical life
≥ 5 × 10
6
cycles (rate 180 cycles/min.)
Alarm output (photo MOSFET relay)
Rated load
120 V AC/DC @ 80 mA (resistive load)
ON resistance
25 Ω
Permissible loss
250 mW
Network interface
Transmission
Half-duplex, asynchronous, no procedure
Interface
Conforms to TIA/EIA-485-A
Max. transmission
distance
500 meters
Baud rate
1200, 2400, 4800, 9600, 19200, 38400 bps
Max. number of nodes
31 (except the master)
Protocol
Modbus-RTU
Parity
None, odd or even
Stop bit
1 bit, 2 bits
Node address
1 to 247
Media
Shielded twisted-pair cable (CPEV-S 0.9 dia.)
Terminating resistor
Built-in (Connect across T2 – T3, when the unit is the
end of the line)
BCD control
signals
Input signals
Dry contact or NPN open collector
Input current
≤ 3 mA
Sensing
6 V
Contact detecting
≤ 1.5 V at ON; ≥ 3 V at OFF
Output signals
NPN open collector
Max. load voltage
24 V DC
Max. load current
10 mA
Saturation voltage
≤ 0.3 V
Leakage current
≤ 500 μA
Alarm output signals
NPN open collector
Max. load voltage
24 V DC
Max. load current
50 mA
Saturation voltage
≤ 1.1 V
Leakage current
≤ 500 μA
Event trigger input
Dry contact or NPN open collector
Input current
≤ 3 mA
Sensing
6 V
Contact detecting
≤ 1.5 V at ON; ≥ 3 V at OFF