32-channel Sink Type Open Collector Isolated Digital Output Module. The I-87041W/I-87041PW module offers 32 Digital Output channels, each of which features Photocouple isolation and supports sink-type output using an open collector. The I-87041W/I-87041PW includes 32 LED indicators that can be used to monitor the status of the Digital Output channels, and options are available for confi guring both power-on and safe values. 4 kV ESD protection an..