Rockwell Automation 198 Series C Modular DeviceNet Starter Auxiliary User Manual - Manual (Page 67)

Specifications 5-8
Publication 198-UM002A-EN-P December 2001
198-IB2S (Sensor Module)
Figure 5.4 198-IB2S Sensor Module
The sensor input module 198-IB2S is designed to interface with hard contacts as well as 2-
and 3-wire sensors. In addition to supporting two 2-inputs via the M12 micro connector, it
also supports open cable and shorted sensor monitoring via the +24V DC output pin. The
power for the sensor is supplied by DeviceNet and is not isolated but is short-circuit
protected. Since the DeviceNet power supply may vary between 25 and 11V, only inputs
which are rated for this range of operation should be attached to the port. The 198-DN and
198-DNG modules support a sensor voltage warning bit, which will activate if the voltage on
the DeviceNet bus falls below 18V. The input status of 2-wire sensors is not guaranteed
below this point, and system designers should use this information to affect the appropriate
action. The module includes a sink/source switch that allows the user to select either mode of
operation.