USER MANUAL – Z-4AI
2
Seneca Z-PC Line module:
Z-4AI
The Z-4AI module acquires up to 4 single-ended input signals (voltage or current type) and it
converts them to a digital format (normalized measure).
General characteristics
It is possible to choose if each input is voltage or current type
It is possible to enable/disable each input
It is possible to change: the electrical start/end scale between ± 10 V, ± 20 mA, the
normalized start/end scale between ± 32000
Configuration of the module (node) address and baud-rate by Dip-Switches
It is possible to add/remove the module to/from RS485-bus without disconnecting the
communication or power supply
It is possible to switch automatically RS485 to RS232 or vice versa
Features
INPUT
Number
4
Resolution
16 bits (15+1 sign). If Electrical End-Scale (E.E.S.)<2V,
resolution=60µV; se 2V<E.E.S.<10V, resolution=300µV
Sampling time
Configurable between: 120 ms or 60 ms
Accuracy
Initial: 0.1% of E.E.S.. If E.E.S.<2V, accuracy=2mV; if
2V<E.E.S.<10V, accuracy=10mV
Linearity: 0.03% of E.E.S. (see initial accuracy)
Zero: 0.05% of E.E.S. (see initial accuracy)
Thermal stability: < 100 ppm/°K
EMI: < 1%
Protection
± 30Vdc and 25mA
Voltage-type IN
Bipolar with E.S.S./E.E.S.(Electrical Start/End Scale) configurable
between: ± 10Vdc. Input impedance: > 100 k
Current-type IN
Bipolar with E.S.S./E.E.S. configurable between: ±20mA.Internal
shunt:50
. To enable these shunts, use the «Analog inputs» Dip-
Switches
Internal supply Vaux
The #7 screw terminals: power 13V to max90mA
CONNECTIONS
RS485 interface
IDC10 connector for DIN 46277 rail (back-side panel) or (alternative)
the screw terminals: 4(GND), 5(B), 6(A)
RS232 interface
Jack stereo 3.5mm connector: plugs into COM port
1500 Vac ISOLATIONS
Between: power supply, ModBUS RS485, analog input
