West Control Solutions N8840 - Manual (Page 80)

CONTROL INPUTS DI2, DI3 (OPTION)
The digital input di2 located on the A-card and
di2 located on the option card are or-linked.
Configurable as switch or push-button!
Optocoupler input for active triggering.
Nominal voltage 24 V DC external
Current sink (IEC 1131 type 1)
Logic “0” -3...5 V
Logic “1” 15...30 V
Current requirement approx.. 5 mA
TRANSMITTER SUPPLY U
T
(OPTION)
Power: 22 mA / ≥ 18 V
If the universal output OUT3 or OUT4 is used
there may be no external galvanic connection
between measuring and output circuits!
GALVANIC ISOLATION
Safety isolation
Function isolation
OUTPUTS
RELAY OUTPUTS OUT1...OUT4
Contact type: potential-free changeover
contact
Max.contact rating: 500 VA, 250 V, 2A at 48...62
Hz,
resistive load
Min. contact rating: 5V, 10 mA AC/DC
Operating life (electr.): 600.000 duty cycles with
max. contact rating
Note:
If the relays operate external contactors, these
must be fitted with RC snubber circuits to
manufacturer specifications to prevent
excessive switch-off voltage peaks.
OUT3, 4 AS UNIVERSAL OUTPUT
Galvanically isolated from the inputs.
Freely scalable resolution: 11 bits
Current output
0/4...20 mA configurable.
Signal range: 0...approx.22mA
Max. load: ≤ 500 Ω
Load effect: no effect
Resolution: ≤ 22 µA (0,1%)
Accuracy ≤ 40 µA (0,2%)
Voltage output
0/2...10V configurable
Signal range: 0...11 V
Min. load: ≥ 2 kΩ
Load effect: no effect
Resolution: ≤ 11 mV (0,1%)
Accuracy ≤ 20 mV (0,2%)
OUT3, 4 used as transmitter supply
Output power: 22 mA / ≥ 13 V
OUT3, 4 used as logic output
Load ≤ 500 Ω 0/≤ 20 mA
Load > 500 Ω 0/> 13 V
OUTPUTS OUT5/6 (OPTION)
Galvanically isolated opto-coupler outputs.
Grounded load: common positive voltage.
Output rating: 18...32 VDC; ≤ 70 mA
Internal voltage drop: ≤ 1 V with I
max
Protective circuit: built-in against short circuit,
overload, reversed polarity (free-wheel diode
for relay loads).
Technical data
80 8840 profiler
Process value input INP1
Mains supply Supplementary input INP2
Optional input INP3
Digital input di1, di2
Relay OUT1 RS422/485 interface
Relay OUT2 Digital inputs di2, 3 option
Relay OUT3 Universal output OUT3
Relay OUT4 Universal output OUT4
Transmitter supply U
T
OUT5, OUT6