Rockwell Automation 44887-PUB, 44887 Enwatch - Manual (Page 13)

Publication GMSI10-UM031C-EN-E - January 2009
Installing the Enwatch 9
Trigger Isolation Jumpers
Four jumpers, JP17 to JP20, are sited on the board to enable the four trigger
inputs to be isolated or non-isolated. Non-isolated means the common of the
trigger input can be connected to the common of the Enwatch unit. With a
jumper removed, the trigger is isolated. Table 1.13 summarizes the jumper
positions.
Normal Operation versus Monitor Mode
The Enwatch unit incorporates an on-board monitor program for checking
the unit and modifying the system’s IP address. Inserting a jumper in JP21
enters into monitor mode.
Table 1.13 Jumper positions
Mode Jumper
External trigger 1 isolated JP17 Out
External trigger 1 non-isolated JP 17 In
External trigger 2 isolated JP18 Out
External trigger 2 non-isolated JP18 In
External trigger 3 isolated JP19 Out
External trigger 3 non-isolated JP19 In
External trigger 4 isolated JP20 Out
External trigger 4 non-isolated JP20 In
IMPORTANT
If an external sensor is to be used that is powered from pin
1 of J3, J4, J5 or J6, then the jumper corresponding to the
trigger channel must be inserted to provide a ground return
path for the sensor power.
Table 1.14 Normal vs. monitor mode
Mode Jumper J21
Normal Out
Monitor In