942 MB

Key Features:

This signal conditioner is a two-channel analog input module with discrete outputs and Modbus communication.
It conditions periodic or pulse wave form inputs and provides solid-state relays for limit alarms or ON/OFF control.

• Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
• Separate microcontrollers on each channel for pulse counting and period measurement
• Solid-state relay outputs enable local limit alarms or host-controlled on/off switching
• Bipolar and unipolar input signal support
• Programmable pulse counter functions
• Input filtering functions include hysteresis, averaging, debounce, relay time delay, and alarm deadband controls
• 4-way isolation (input, output, power, network)
• Watchdog timers provide a failsafe output
• Self-diagnostics monitor microcontroller activity to detect operational failures (lock-up) and execute a reset to restore communication
• Operating temperature: -25°C to +70°C (-13°F to +158°F)

Product Details

Frequency/Counter Input


Input Ranges
Two input channels:
– 0 to 50KHz in three selectable ranges
– Amplitudes up to 140V AC or 200V peak
– Pulse counter range of 0 to 65535
Resolution
– 0 to 100Hz input range: 0.01Hz
– 0 to 1000Hz input range: 0.1Hz
– 0 to 50,000Hz input range: 1Hz
– Pulse counter: 1 pulse
– Minimum Input Pulse Width
– 10µS (frequency input); 5mS (pulse input).
Counting Rate
– 100Hz maximum counting rate
(5mS ON and 5mS OFF for 10mS period or 100Hz).
Input Impedance
– 35K ohms, typical.
Input Filter Bandwidth
– -3dB at 35kHz, typical.
Input Pullup/Pulldown
Software selectable 2.7K ohm input pullup to +5V and a 1K ohm input pulldown to return. The resistors may also be left floating (none).
Input Debounce
0 to 1.375 seconds, configurable in 5mS increments.
Noise Rejection
Common mode: 80dB @ 60Hz, typical with 100 ohm input unbalance.

Discrete Output


Output Type
– Solid-State Relay (SSR), one Form A (SPST-NO) switch per input channel. Outputs share a common return connection at the RTN terminals for low-side switching
Output Voltage Range
– 0 to 48V DC, 1A DC.
Output ON Resistance
- 0.4 ohms maximum.
Output Response Time
– 4.1ms typical, from receipt of command to gate transition of the output MOSFET.

Communication


Supported Modbus Commands
The command/response protocol for communicating with this module adheres to the Modbus/RTU standard for the following Modbus Functions.
• Read Holding Registers Read Coil
• Read Input Registers Reset Slave
• Preset Single Register Report Slave ID
• Force Multiple Coils Force Single Coil
• Preset Multiple Registers
LED Indicators
- LEDs indicate power, status, and discrete level/alarm.

Power and Isolation


Power Requirements
– 10 to 36V DC.
– 22 to 26V AC.
Isolation
– 1500V AC for 60 seconds or 250V AC continuous.
– 4-way isolation between input, network, power and discrete I/O circuits. Inputs are isolated channel-to channel for common mode voltage to ±5V DC.
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