PDS-E PDS13E, PDS15E & PDS-D PDS15E-D Manuals

Manual here http://www.parkermotion.com/manuals/PD/PDS_E.pdf‎

2.5A min, 5A max driver in 350mA steps
step settings 400, 1000, 2000, 4000 (i.e. 1/2, 1/5, 1/10, 1/20)
opto-isolated inputs
regenerative dump circuit