AC Operated: AC excitation output for use with AC-LVDTs. [DMx-Ax-xxx]
DC Operated: DC excitation output for use with DC-LVDTs [DMx-Dx-xxx]

1 channel (5 digit readout) - for utilizing 1 LVDT [DMI-x1-xxx]
2 channels (6 digit readout) - for utilizing 2 LVDTs [DMC-x2-xxx]

115-240 VAC operation, no relays [DMx-xx-1xx]
18-30 VDC (24 VDC) operation, no relays [DMx-xx-2xx]
18-30 VDC (24 VDC) operation, no relays [DMx-xx-2xx]
15-78 VAC, 10-72 VDC (24 VDC) operation, no relays [DMx-xx-2xx]
115-240 VAC operation, four 5 A Form A relays [DMx-xx-8xx]
18-30 VDC operation, four 5 A Form A relays [DMx-xx-9xx]
18-30 VDC Operation, four 5 A Form A relays [DMx-xx-9xx]

Without analog output [DMx-xx-x0x]
0 to 10 VDC single [DMx-xx-x1x]
0 to 10 VDC dual [DMx-xx-x2x]
4 to 20 mA, 0 to 20mA (sourcing) [DMx-xx-x3x]

Without digital output [DMx-xx-xx0]
RS-232 output [DMx-xx-xx1]
Ethernet output [DMx-xx-xx2]