Phoenix Contact, 91.6.040.400 Isolated Interface Converter

The Phoenix Contact 91.6.040.400 is an isolated interface converter, primarily designed for industrial applications.

Its main function is to convert and electrically isolate serial communication signals, typically between RS-232 and other standards like RS-422 or RS-485. This isolation is crucial for protecting connected devices from voltage differences, ground loops, and electromagnetic interference, thereby ensuring reliable and robust data transmission in harsh industrial environments. It’s often used to extend communication distances or integrate devices with different serial interface requirements.

Technical Specification

1. General & Core Function:

Module Type: Interface Converter
Conversion: Bidirectional conversion between RS-232 (V.24) and RS-422 (V.11) / RS-485 interfaces.
Channels: 2 (RxD, TxD), allowing for full duplex (4-wire) or half duplex (2-wire) operation for RS-485.
Isolation: 3-way electrical isolation (VCC // RS-232 // RS-485/RS-422).
- Test Voltage: 1.5 kV AC between data interfaces and power supply, and between data interfaces themselves.
Application: Industrial use, typically in switch cabinets or switch boxes.
Mounting: DIN rail mounting.

2. Electrical Data:

Nominal Supply Voltage: 24 V AC/DC
Supply Voltage Range: 18 V AC/DC … 30 V AC/DC (via pluggable COMBICON screw terminal block)
Typical Current Consumption: 85 mA (at 24 V DC)
Max. Current Consumption: 100 mA
Maximum Power Dissipation: 2.04 W (for nominal condition)

3. Interfaces & Communication:

* **RS-232 Interface (V.24):**
    * **Standard:** ITU-T V.28, EIA/TIA-232, DIN 66259-1
    * **Connection Method:** D-SUB 9 plug
    * **Pin Assignment:** DTE/DCE switchover via internal DIP switch
    * **Transmission Length:** 15 m (shielded twisted pair)
    * **Supported Protocols:** Transparent protocol
    * **Serial Transmission Speeds:** 1.2, 2.4, 4.8, 7.2, 9.6, 19.2, 31.25, 38.4, 57.6, 75, 93.75, 115.2 kbps

* **RS-422 Interface (V.11):**
    * **Standard:** ITU-T V.11, EIA/TIA-422, DIN 66348-1
    * **Connection Method:** Pluggable screw connection
    * **Transmission Length:** 1200 m (shielded twisted pair)
    * **Termination Resistor:** 390 Ω (can be connected, also 150 Ω option)
    * **Supported Protocols:** Transparent protocol
    * **Serial Transmission Speeds:** 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 75, 93.75, 115.2 kbps
    * **Operating Modes:** 4-wire point-to-point operation

* **RS-485 Interface:**
    * **Standard:** EIA/TIA-485, DIN 66259-1
    * **Connection Method:** Pluggable screw connection
    * **Transmission Length:** 1200 m (shielded twisted pair)
    * **Termination Resistor:** 390 Ω (can be connected, also 150 Ω option)
    * **Data Direction Switching:** Automatic control or via RTS/CTS
    * **Supported Protocols:** Transparent protocol
    * **Serial Transmission Speeds:** 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 75, 93.75, 115.2 kbps
    * **Operating Modes:** 2-wire (half-duplex) or 4-wire (full-duplex)

Bit Distortion: $\leq 5%$
Bit Delay: $\leq 2.5 μ s$
Data Format: UART/NRZ with 10/11 bits character length.

4. Mechanical & Environmental:

Dimensions (W x H x D): 22.5 mm x 99 mm x 114.5 mm
Housing Material: PA 6.6-FR (Polyamide, flame-retardant)
Housing Color: Green (RAL 6021)
Weight (excluding packing): 196.1 g
Degree of Protection: IP20
Operating Temperature: -40 °C … 70 °C
Storage/Transport Temperature: -40 °C … 85 °C
Permissible Humidity (operation): 10 % … 95 % (non-condensing)
Altitude: $\leq 5000$ m
Mechanical Tests (according to IEC 60068 standards):
- Free fall: 1 m
- Vibration resistance: 5g, 10-150 Hz, 2.5 h (in XYZ direction)
- Shock: 25g, 11 ms half-sine shock pulse

5. Approvals & Compliance:

CE: CE-compliant
EAC: Eurasian Conformity
ATEX: $ϵ_{x}$ II 3 G Ex nA IIC T4 Gc (for use in potentially explosive areas, Zone 2)
IECEx: Ex nA IIC T4 Gc
UL (USA/Canada): 508 Recognized, Class I, Div. 2, Groups A, B, C, D; Class I, Zone 2, AEx nA IIC T4; Class I, Zone 2, Ex nA IIC T4 Gc X
DNV GL: Shipbuilding approval (Temperature B, Humidity A, Vibration A, EMC B, Enclosure – required protection by rules)
ABS: Shipbuilding approval
Corrosive Gas Test: ISA-S71.04-1985 G3 Harsh Group A