Description
Application Scenarios
A Midwest packaging machinery OEM was servicing a fleet of late-1990s labeling machines built around 3 HP shunt-wound DC spindle motors. The original drives had become erratic—speed would drift during long runs, and the OEM replacement had long since gone out of production. The maintenance team needed a drop-in replacement that would fit the existing panel cutout, accept the same 240 VAC single-phase supply, and preserve the original tachometer feedback wiring. They selected the 1361-NO61-2-5 because its open chassis footprint matched the original mounting pattern and its three selectable regulation modes allowed them to replicate the original tuning without rewiring the feedback loop. The swap was completed during a single weekend shutdown, and the labeling line returned to production with stable speed regulation and no further drift complaints.
In a second case, a small job-shop lathe with a 3 HP DC spindle was stalling under heavy roughing loads after its original drive failed. The electrician installed a 1361-NO61-2-5 in speed feedback mode using the existing DC tachogenerator. The drive’s 150% current limit for one minute handled the high breakaway torque of the spindle without tripping, while armature voltage feedback provided adequate regulation for the balance of the cut. The repair cost a fraction of converting the machine to an AC spindle system, keeping a productive asset in service for years longer.
Parameter
| Parameter | Value / Description |
|---|---|
| Product Model | 1361-NO61-2-5 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Family | Bulletin 1361 DC Packaged Drives |
| Drive Type | Single-phase, full-wave, non-regenerative DC drive, open chassis |
| AC Input Voltage | 120 VAC or 240 VAC (+10 %, −5 %), single phase |
| AC Input Frequency | 50 or 60 Hz ±2 Hz |
| Armature Output | 0–180V DC (based on 240 VAC input) |
| Power Range | 1/4–3/4 HP at 120 VAC; 1–5 HP at 240 VAC |
| Regulation Modes | Armature voltage, speed (AC/DC tach feedback), torque/current |
| Current Limit | 0–100 % rated continuous; 150 % for 1 minute |
| Shunt Field Supply | 100V or 200V DC, max 0.5 A, with field economizing to 25 % standby |
| Accel / Decel | Linearly adjustable 0.2 to 50 seconds, independently set |
| Speed Regulation | ±2 % (armature feedback) / ±1 % (tach feedback) of base speed |
| Ambient Temperature | 0 °C to 40 °C operating; 0 °C to 65 °C storage |
| Approximate Weight | Open type 20 lb (9.06 kg) |
