I. Complete Model Analysis (Including 2EA)

BTM15.2: Series + Version (BTM = Terminal Unit, 15 = Series, .2 = Second Generation)

TA: Slot 1 = Emergency Stop Module (Dual-channel Safety Circuit, PL d)

VA: Slot 2 = Spindle Ratio Knob (0–150%)

TA: Slot 3 = Quick Stop Module

WE: Slot 4 = Feed Ratio Knob (0–150%)

MA: Slot 5 = Membrane Keyboard + LED Status Indicator

2EA: Interbus-S Standard Interface (Electrical Interface Type)

II. Core Technical Parameters

Structure: 5-slot Modular Panel, 19" Standard Cabinet Embedded

Communication: Interbus-S (2EA), Compatible with BTV30 / System200 Controller

I/O: 16 In / 16 Out (Local)

Power Supply: 24 VDC ±10%

Protection: Front IP54, Back IP20

Size: 483 × 135 × 60 mm

Weight: ≈ 3.5 kg

Safety Level: Emergency Stop Compliant with EN ISO 13849-1 (PL d)

III. Function Module Description

TA (Emergency Stop): Red Mushroom Head, Dual-channel Safety Relay Output

VA (Spindle Ratio): With Scale Knob, 0–150% Continuous Adjustment

TA (Quick Stop): Independent Stop Circuit, Priority Second to Emergency Stop

WE (Feed Ratio): Knob Adjusts Feed / Rapid Movement Speed

MA (Keyboard): 4×8 Thin Film Keys, With LED Status Lights, Dustproof and Oilproof

IV. Common Aliases and Ordering Information

Alias: 3TM15.2 (Market Common Name, Officially BTM15.2)

Part Number: R911283258 (Unique Official Code)

Alternative: Same Model with Different Interfaces (e.g. 2EB = Profibus)

Price Range: New ≈ $1,600–$2,000, Refurbished ≈ $1,200

V. Wiring and Interfaces (2EA)

Interbus-S Interface: DB9 Pin Socket 1: GND

2: TXD+

3: RXD+

4: 24V

5: GND

6: TXD‑

7: RXD‑

8: Empty

9: Empty

Power Supply: 24VDC Terminal (±10%)

Six, Application Scenarios

CNC machining centers, turning and milling combined machines

Automated production lines, robot workstations

Equipment requiring safety emergency stop + double-speed adjustment + operation keyboard