I-87088W-G 8-ch PWM Output and 8-ch High-speed Counter Input Module

The I-87088W-G/S provides eight PWM output channels and eight high-speed counter inputs in a single I-8K/I-87K PAC I/O module. PWM is used to drive analogue-style loads by switching a digital output with a variable duty cycle and frequency, which suits position or speed control of motors, lamp dimming and fan speed control.Burst or continuous mode can be selected for the PWM outputs depending on the application, and each channel can run individually or in synchronised operation. Output can be started by software or hardware trigger. Each digital input channel can also operate as a counter at up to 1 MHz, with 32-bit counts.The /S variant allows the load voltage to be increased from +3.5 to +50 V for both the PWM outputs and the counter channels. The price list for this ordering code includes a DN-8P8C/S external board.ApplicationsControlling motor position or speedDimming lamp brightnessControlling fan speed

The I-87082W-G CR is a two-channel counter and frequency input module for engineers who need high-speed pulse counting or frequency measurement within an I-8K/I-87K PAC I/O system. Each channel can be set up for counter or frequency operation, with 32-bit counts and inputs up to 100 kHz.Each input can be chosen as isolated or non-isolated to suit the signal source. Isolated inputs provide 3750 Vrms isolation and accept ON levels from +3.5 VDC to +30 VDC. Non-isolated inputs use a programmable threshold between 0 and +5 VDC. A programmable digital filter and a low pass filter help reject noise with pulse widths shorter than the minimum high or low width.Two sink-type open-collector outputs provide programmable alarm signalling, and the module includes an RS-485 port using the DCON protocol. A dual watchdog, with a 1.6-second module watchdog and a programmable communication watchdog, adds supervision for unattended installations.ApplicationsBuilding AutomationFactory AutomationMachine AutomationRemote MaintenanceRemote DiagnosisTesting Equipment

The I-87084W-G CR is a 32-bit high-speed input module that suits engineers who need to count pulses, measure frequency or read encoder position on a PAC I/O backplane. Each of its eight channels can be set individually, so some can run as up counters while others measure frequency, act as up/down counters or read encoder signals.The module offers a programmable digital filter that suppresses noise pulses narrower than its minimum high or low width, and this filter works with both isolated and non-isolated inputs. In counter mode, a virtual battery backup preserves counter values. Isolation is selected by jumper, and the module is rated for 2000 VDC intra-module isolation.Communication is via a single RS-485 port using the DCON protocol at 1200 to 115200 bps. The module is rated for an operating temperature of -25 ~ +75 °C and is certified to CE, UKCA, FCC, RoHS and WEEE.ApplicationsCounter measurementFrequency measurementEncoder motion control

The I-87089W-G is a vibrating wire input module for engineers who need to read resonant-frequency sensors and pass the results to a control system over a serial link. It measures sensor wire frequencies from 450 ~ 6000 Hz and gives a temperature reading for each sensor through its temperature wires.The module supports 8 ~ 32 vibrating wire inputs. Additional DN-1618UB units can be connected to extend a single I-87089W/S to 32 channels. Excitation uses an enhanced square wave, and the module isolates channels from each other at 1 kV and 3000 VDC inside the module.Communication is through one RS-485 port using DCON at 1200 ~ 115200 bps, with N, 8, 1 data format. A module watchdog and a programmable communication watchdog are included. The unit is specified for an operating range of -25 ~ +75 °C.ApplicationsReadout of vibrating wire sensors, where wire tension is derived from the resonant frequency