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9.9.3: Normal Mode
The device is polling the inputs at 100Hz (once every 10 msec), debouncing the inputs and
incrementing the Transition Accumulators for each channel as appropriate.
The inputs are represented by Channel 1 in the LSB through Channel 8 in the MSB of the low order
byte of the register.
The Modbus Map for the Digital Status Input Modules (and operating details) can be found in the
Modbus Communicating I/O Modules Manual.
9.10: Specifications
The following multiple analog or digital I/O modules mount externally to the Nexus Socket Meter.
The Nexus 1262 and 1272 Units DO NOT SUPPORT I/O MODULES. Use an additional power
supply, such as PSIO, to provide I/O capability. See Chapter 6 for mounting diagrams.
Analog Transducer Signal Outputs (Up to two modules can be used with the Nexus.)
1mAON4: 4 Analog Outputs, scalable, bidirectional.
1mAON8: 8 Analog Outputs, scalable, bidirectional.
20mAON4: 4 Analog Outputs, scalable.
20mAON8: 8 Analog Outputs, scalable.
Analog Transducer Inputs (Multiple modules can be used.)
8AI1: 8 Analog Inputs 0–1mA, scalable and bidirectional.
8AI2: 8 Analog Inputs 0–20mA, scalable and bidirectional.
8AI3: 8 Analog Inputs 0–5V dc , scalable and bidirectional.
8AI4: 8 Analog Inputs 0–10V dc , scalable and bidirectional.
Digital Dry Contact Relay Outputs (Multiple modules can be used.)
4RO1: 4 Relay Outputs 10 Amps, 125V ac , 30V dc , Form C.
Digital Solid State Pulse Outputs (Multiple modules can be used.)
4PO1: 4 Solid State Pulse Outputs, Form A KYZ pulses.
Digital Inputs (Multiple modules can be used.)
8DI1: 8 Digital status inputs Wet/Dry Auto Detect, up to 300V dc .
Other I/O Accessories
PSIO: External Power Supply which is necessary if you are connecting more than 2 to 4 I/O
modules to a Nexus 1250/1252 Meter. The number is determined by the type of I/O
Module.
MBIO: Bracket for surface-mounting I/O modules to any enclosure.
Electro Industries/GaugeTech
Doc # E107706 V1.25
9-16
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