Phoenix FLKM Series D-Sub Interface Connection Modules Selection Guide

Opening: Industrial-Grade D-Sub Interface Adapters for Cabinet Signal Routing

The Phoenix FLKM series is a portfolio of specialized D-sub interface connection modules designed for industrial control cabinet signal transmission, covering D-sub pin counts from 9-pin (D9) to 50-pin (D50). These modules support straight (S) and bent (B) pin configurations, with optional accessories (ZFKDS, LA, FL/V, KDS3-MT) for customized installation and signal expansion. Featuring IP20 cabinet protection, anti-vibration design, and compatibility with standard D-sub cables, they ensure stable signal transmission for industrial communication, I/O control, and sensor/actuator connection in harsh factory environments. This guide categorizes models by D-sub pin count, decodes nomenclature, and provides scenario-based recommendations for efficient selection.

I. Core Advantages of the FLKM Series

1. Full D-sub specification coverage: Supports D9/D15/D25/D37/D50 D-sub interfaces, adapting to low-pin (signal) to high-pin (multi-channel I/O) connection needs.
2. Dual pin configuration flexibility:
   • S (straight pin): For front-panel or direct cable connection, suitable for fixed wiring scenarios;
   • B (bent pin): For PCB-mounted or space-constrained cabinet internal routing, reducing cable bending stress.
3. Diversified accessory expansion: Optional ZFKDS (shielded cable clamp), LA (latching adapter), FL/V (fiber/voltage adapter), and KDS3-MT (terminal block adapter) for scenario-specific customization.
4. Industrial durability: High-temperature-resistant insulation (-40°C to +85°C operating range), anti-vibration construction, and gold-plated contacts for low-contact-resistance, long-term stable signal transmission.
5. Standardized mounting: DIN rail or cabinet-panel compatible, enabling seamless integration with Phoenix terminal blocks and control cabinet infrastructure.

II. Product Classification & Detailed Parameter Table

The FLKM series is categorized by D-sub pin count (D9/D15/D25/D37/D50), with sub-variants for pin type (S/B) and accessory configuration.

1. D50 Series (High-Pin-Count Multi-Channel Signal)

For high-density 50-channel signal/I/O transmission, suitable for complex industrial control systems with multi-point data exchange.

2. D37 Series (Medium-High-Density Signal/I/O)

37-pin D-sub modules for medium-complexity multi-channel control, with rich accessory options for extended functionality.

3. D25 Series (Medium-Density Signal/Power Hybrid)

25-pin D-sub modules with specialized KDS3-MT terminal block adapters for terminal-to-D-sub signal conversion, suitable for mixed power/signal scenarios.

| Part Number | Complete Model | Core Parameters | Key Features | Application Scenario ||-------------|----------------|----------------|--------------|--------------|----------------------|| Straight Pin (S) | | | | || 2303006 | FLKM-D25 SUB/S/ZFKDS | D25; S-pin; ZFKDS | Shielded 25-channel signal connection | 25-channel sensor signal transmission (e.g., warehouse temperature/humidity sensor network) || 2281144 | FLKM-D25 SUB/S | D25; S-pin; No accessory | Standard straight pin module | Basic 25-channel control signal routing (e.g., workshop lighting group control) || Bent Pin (B) | | | | || 2304050 | FLKM-D25 SUB/B/ZFKDS | D25; B-pin; ZFKDS | Shielded PCB-mounted 25-channel connection | Cabinet-internal PCB 25-channel I/O signal transfer (e.g., PLC auxiliary I/O interface) || 2281694 | FLKM-D25 SUB/B/LA | D25; B-pin; LA | Latching bent pin connection | Vibration-prone 25-channel signal interface (e.g., small robotic arm control signal) || 2304526 | FLKM-D25 SUB/B/KDS3-MT/TU830 | D25; B-pin; KDS3-MT (terminal block adapter) + TU830 | D-sub to terminal block signal conversion | 25-channel terminal block wiring to D-sub interface (e.g., field sensor terminal to controller D-sub) || 2304539 | FLKM-D25 SUB/B/KDS3-MT/TU810/P | D25; B-pin; KDS3-MT + TU810/P (power terminal) | Power-signal hybrid terminal conversion | 25-channel mixed power/signal terminal to D-sub connection (e.g., actuator power + feedback signal) || 2304513 | FLKM-D25 SUB/B/KDS3-MT/TU810 | D25; B-pin; KDS3-MT + TU810 | Standard terminal-to-D-sub conversion | 25-channel general terminal wiring to D-sub interface (e.g., control cabinet terminal to D-sub panel) || 2281209 | FLKM-D25 SUB/B | D25; B-pin; No accessory | Standard bent pin module | Basic PCB 25-channel signal connection (e.g., auxiliary instrument control interface) |

4. D15/D9 Series (Low-Pin-Count Signal/Communication)

15-pin (D15) and 9-pin (D9) modules for basic signal/communication transmission (e.g., serial port, small-scale I/O).

III. FLKM Series Nomenclature Decoding

FLKM-D[Pin Count] SUB/[Pin Type]/[Accessory Combination]

• FLKM: Product series identifier (D-sub interface connection module for industrial cabinet signal routing).
• D[Pin Count]: D-sub interface pin count (9/15/25/37/50), indicating the number of signal/power channels (higher count = more channels for multi-point transmission).
• SUB: D-sub interface type (standard industrial D-sub connector, compatible with universal D-sub cables).
• Pin Type:
  • S = Straight pin (front-facing, for direct cable or panel-mounted connection, suitable for fixed wiring);
  • B = Bent pin (right-angle, for PCB-mounted or space-constrained cabinet internal routing, reducing cable bending).
• Accessory Combination (optional, for customized functionality):
  • ZFKDS = Shielded cable clamp (enhances EMI protection and cable fixation);
  • LA = Latching adapter (anti-loose connection for vibration-prone environments);
  • FL/V = Fiber/voltage hybrid adapter (supports mixed electrical/fiber signal transmission);
  • KDS3-MT = Terminal block adapter (converts D-sub to terminal block for field wiring);
  • 4-FLK14 = 4-channel FLK14 sub-interface (signal branching/expansion);
  • TU810/TU830 = Terminal block type (TU810 for general wiring, TU830 for power signal);
  • SO391/SO397/SO91 = Accessory model codes (matching specific mounting or signal requirements).

IV. 3-Step Quick Selection Technique

Step 1: Select D-sub Pin Count Based on Channel Quantity

• Basic serial communication (RS-232/485): Choose D9/D15 models (e.g., 2281128 D9, 2281131 D15) for 9-15 channel low-pin signal transmission.
• Medium-density I/O control: Opt for D25 models (e.g., 2281144 D25) for 25-channel power/signal hybrid connection; add KDS3-MT for terminal-to-D-sub conversion.
• High-density multi-point signal: Pick D37/D50 models (e.g., 2281115 D37, 2304021 D50) for 37-50 channel large-scale sensor/actuator network.

Step 2: Choose Pin Type According to Installation Scenario

• Panel-mounted/fixed cable connection: Select S (straight pin) models (e.g., 2304018 D37 S/ZFKDS) for front-panel or direct cable access.
• PCB-mounted/space-constrained cabinet: Use B (bent pin) models (e.g., 2304076 D50 B/ZFKDS) for right-angle PCB integration, saving cabinet space.

Step 3: Match Accessories to Functional Requirements

• High-EMI environments (inverters/motors): Add ZFKDS (shielded clamp) (all ZFKDS-suffix models) to suppress electromagnetic interference.
• Vibration-prone scenarios (robots/machinery): Choose LA (latching adapter) (e.g., 2281704 D37 B/LA) to prevent connector loosening.
• Terminal block field wiring: Select KDS3-MT accessories (e.g., 2304513 D25 B/KDS3-MT/TU810) for D-sub to terminal block conversion.
• Signal branching/expansion: Pick models with 4-FLK14 (e.g., 2293349 D37 S/4-FLK14/SO397) for multi-group sub-interface distribution.

V. Recommended Industry-Scenario Combinations

VI. Selection Pitfall Avoidance Guide

1. Pin count mismatch: 50-channel sensor arrays using D37 modules → Choose D50 models (e.g., 2304021) to avoid signal multiplexing and transmission bottlenecks.
2. Pin type error: PCB-mounted scenarios using straight pin (S) modules → Select bent pin (B) models (e.g., 2304076 D50 B/ZFKDS) to fit PCB layout and reduce cable stress.
3. Accessory neglect: High-EMI environments using non-ZFKDS models → Add ZFKDS shielded clamps (e.g., 2303006 D25 S/ZFKDS) to prevent signal distortion from electromagnetic interference.
4. Vibration scenario oversight: Robotic workstations using non-LA models → Choose LA latching adapters (e.g., 2281704 D37 B/LA) to avoid connector loosening and signal loss.
5. Terminal wiring incompatibility: Field terminal wiring using pure D-sub modules → Select KDS3-MT accessory models (e.g., 2304513) for terminal-to-D-sub conversion, eliminating custom cable fabrication.

Conclusion: Select the Right FLKM Module for Industrial Cabinet Signal Routing

The Phoenix FLKM series provides targeted D-sub interface connection solutions for industrial control cabinet signal transmission, covering low-pin serial communication to high-pin multi-channel I/O control, with flexible pin types and accessories for installation and functional customization.