Application Scenarios
Picture a refinery boiler control room where the existing electronic PID controller suffered from frequent signal drift caused by high electromagnetic fields from nearby switchgear, producing erratic steam-drum pressure regulation and threatening safe boiler operation . The facility replaced the electronic unit with the 130M-N5, which operates on clean, dry instrument air at 20–22 psi and controls the steam valve actuator directly via a 3–15 psi pneumatic output. The operator sets the desired drum pressure on the large front dial, and the controller’s built-in PID action maintains stable pressure control. The front-panel Auto/Manual transfer switch allows the operator to take manual control during upsets without bumping the process — a critical feature that eliminated pressure spikes and ensured continuous, safe boiler operation .
Now imagine a chemical plant’s reactor temperature loop, still controlled by its original Consotrol 130 panel after more than three decades. The automatic PID module begins to drift, but the plant cannot justify a full DCS migration. Because the 130M-N5 uses separate automatic and manual control units housed in the same shelf, the operator can physically slide out the faulty auto unit while the manual unit continues to control the process — no shutdown, no production loss, no requalification . Both sections use jack-plug pneumatic connections with built-in check valves, so they can be removed from the shelf without disconnecting a single piece of piping . For a continuous-process facility, that modularity is the difference between a planned maintenance window and a forced shutdown.
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | 130M-N5 — Foxboro’s model designation; “N” = narrow proportional band (5–500% PB), “5” = full PID action, direct acting |
| Manufacturer | Foxboro (now part of Schneider Electric’s AVEVA portfolio) — a pioneer of analog process instrumentation |
| Product Category | Pneumatic indicating PID controller (single-loop), Consotrol 130 series |
| Input Signal (PV) | 3–15 psi (0.2–1.0 bar / 20–100 kPa) — the standard pneumatic transmitter signal |
| Output Signal (OUT) | 3–15 psi (0.2–1.0 bar / 20–100 kPa) — drives pneumatic control valves and positioners |
| Supply Air | 20–22 psi (1.4–1.5 bar), clean, dry, oil-free instrument air filtered to remove particles >5 microns |
| Control Modes | P, PI, PID — full PID with direct-acting control direction |
| Proportional Band | 5% to 500% (adjustable, narrow-band version) — tunes how aggressively the controller responds to deviation |
| Reset (Integral) Time | 0.01 to 50 min/repeat (adjustable) — determines how quickly steady-state offset is eliminated |
| Rate (Derivative) Time | 0.01 to 50 min (adjustable) — provides anticipatory action on rapidly changing processes |
| Accuracy / Deadband | ±0.5% of span (typical); deadband <0.1% of span on the automatic control unit |
| Air Consumption | ~0.5 m³/h (0.3 scfm) in Auto; ~1.0 m³/h (0.6 scfm) in Manual; add ~0.08 m³/h (0.05 scfm) for derivative action |
| Display | Vertical transparent scale with dual pointers — green = PV (process variable), red = SP (setpoint) |
| A/M Transfer | Bumpless and balanceless via integral-balance method — no process bump when switching modes |
| Mounting / Enclosure | Panel-mount (flush) in 101/102 series shelf, 1 unit of shelf capacity; up to 10 instruments per shelf; IP65 |
| Panel / Orientation | Vertical panels 3–25 mm (0.13–1 in) thick; may be inclined up to 75° with rear lower than front |
| Physical Dimensions / Weight | 17.8 × 5.1 × 30.5 cm (H × W × D); approx. 0.5 kg (0.3 kg per some sources) — compact and dense-panel friendly |
| Environmental Adaptability | Operating −20 °C to +60 °C (some sources −40 °C to +85 °C); intrinsically safe, suitable for Class I Division 1 & 2 |
| Lifecycle Status | Discontinued — Foxboro/Schneider Electric no longer manufactures replacements; available as new-surplus, NOS, or certified refurbished stock only |
