B&B Electronics ZXT9-IOA-KIT - Manual - Manual (Page 14)

Product Introduction
8 Manual Documentation Number: ZXTx-IO-x-4113m
2.4 I/O Types and Characteristics
The analog inputs, analog outputs and digital inputs are not isolated. They share the same common within the module. Digital
outputs are isolated through relay contacts.
2.4.1 Digital / Pulse Inputs
Digital Inputs can detect the status of discrete control devices, contact closures, transistor switches or on/off DC voltage
signals (low or high logic levels). Voltages below 1 VDC are interpreted as a low state. Voltages above 1 VDC up to 48 VDC
are interpreted as a high state.
Each digital Input is selectable between NPN (sinking) and PNP (sourcing) types. The digital Input terminals can accept
voltages in the range 0-48VDC.
The digital inputs can also be used as a pulse/frequency input in Modbus mode only. The maximum pulse frequency is 20
KHz.
2.4.2 Digital Outputs
Digital Outputs send on/off signals (low or high logic levels) to drive external devices such as indicators, relay coils or the
inputs of other equipment such as PLC
’s, SCADA, etc. Digital Outputs in Zlinx Xtreme I/O modules have a Form C Relay
(common, normally open and normally closed) rated at 4A and 250VAC.
2.4.3 Analog Inputs
Each analog input can be individually configured as voltage or current types. Following selections are available:
a) 0-10 Vdc
b) 0-5 Vdc
c) 0-20 mA
d) 4-20 mA
The data is automatically scaled as a 16 bit register (0-65,535) for full scale in the Modbus register. To see how to calculate
corresponding values in Modbus, refer to section
Appendix F .
2.4.4 Analog Outputs
Each analog output can be individually configured as voltage or current types. Following selections are available:
a) 0-10 Vdc
b) 0-5 Vdc
c) 0-20 mA
d) 4-20 mA
The data is automatically scaled as a 12 bit register (0-4,096) for full scale in the Modbus register. To see how to calculate
corresponding values in Modbus, refer to section
Appendix F .