P0914WM | FOXBORO FBM241c Discrete I/O Module

The Channel Isolated Discrete I/O Modules (FBM241/b/c/d) feature eight discrete input channels and eight discrete output channels. These modules, along with their associated termination assemblies (TAs), are designed to handle various input and output signal voltages, including:

15 to 60 V DC
120 V AC/125 V DC
240 V AC

Depending on the module configuration, the TAs include current limiting devices, fuses, relays, or relay outputs with either internal or external power sources and fusing.

The modules offer the following key configurations:

FBM241c:
- Input: 15 to 60 V DC (contact, unprotected or fused).
- Output: 15 to 60 V DC at 2 A or 240 V AC at 5 A (with external power source).

Each module offers galvanic isolation for inputs and outputs, and when used with external excitation, the inputs and outputs are group isolated.

These modules perform the required signal conversion for interfacing with field sensors and optionally communicate with redundant fieldbus systems. Additionally, they support the execution of Discrete I/O or Ladder Logic programs with configurable options, such as Input Filter Time, Fail-Safe Configuration, Fail-Safe Fall-Back, and Sustained or Momentary Outputs.

Features

Eight Discrete Inputs and Outputs:
The modules support discrete signals with isolation between each channel and ground.
Support for Various Voltages:
- 15 to 60 V DC
- 120 V AC/125 V DC
- 240 V AC
Galvanic Isolation:
Each input and output is galvanically isolated from all other channels, ensuring safe and reliable operation, even in noisy environments.
Rugged Design:
The modules are designed to meet Class G3 (harsh) environmental standards, making them suitable for a wide range of industrial applications.
Programmable Options:
Supports configurable parameters, such as Input Filter Time, Fail-Safe Configuration, Momentary Output Pulse Interval, and more.
Versatile Termination Assemblies (TAs):
The TAs are equipped with:
- Current limiting devices
- Fuses
- Relay outputs
- Solid-state outputs
- Relay outputs with internal or external power source

Functional Specifications

Input/Output Channels

8 input channels and 8 output channels with galvanic isolation.

Filter/Debounce Time

Configurable debounce time options: No Filtering, 4 ms, 8 ms, 16 ms, or 32 ms.

Input Specifications (FBM241 and FBM241b)

On-State Voltage: 15 to 60 V DC.
Off-State Voltage: 0 to 5 V DC.
Typical Current: 1.4 mA at 5 to 60 V DC.
Source Resistance Limits:
- On-State Resistance: 1 kΩ (max) at 15 V DC.
- Off-State Resistance: 100 kΩ (min) at 60 V DC.

Contact Sensor Function (FBM241c and FBM241d)

Open-Circuit Voltage: 24 V DC ±15%.
Short-Circuit Current: 2.5 mA (max).
On-State Resistance: 1.0 kΩ (max).
Off-State Resistance: 100 kΩ (min).

Output Specifications

For FBM241 and FBM241c (with external power source):
- Applied Voltage: 60 V DC (max).
- Load Current: 2.0 A (max).
- Off-State Leakage Current: 0.1 mA (max).
For FBM241b and FBM241d (with internal power source):
- Output Voltage (No Load): 12 V DC ±20%.
- Source Resistance: 680 Ω (nominal).
- Off-State Leakage Current: 0.1 mA (max).
- Inductive Loads: A protective diode or metal oxide varistor (MOV) may be required.

Isolation

Each input and output channel is galvanically isolated from other channels and from ground.
The module can withstand up to 600 V AC for one minute between any channel and ground or between channels.

CAUTION
These modules are not intended for permanent connection to voltages exceeding their specified limits. Violation of electrical safety codes can lead to electric shock or other hazards.

Power Requirements

Input Voltage Range (Redundant): 24 V DC ±5%, -10%.
Maximum Consumption: 5 W at 24 V DC.
Maximum Heat Dissipation: 6 W at 24 V DC.

Loop Power Supply Protection

Input Current: Limited to 2.5 mA for inputs.
Resistor Limitation: 680 Ω for outputs with internal power.

Regulatory Compliance

Electromagnetic Compatibility (EMC):
- Meets the European EMC Directive 2004/108/EC (prior to April 20, 2016) and 2014/30/EU (beginning April 20, 2016).
- Complies with EN61326-1:2013, Class A emissions, and industrial immunity levels.
RoHS Compliance:
- Complies with European RoHS Directive 2011/65/EU, including amendments 2015/863 and 2017/2102.

Environmental Specifications

Parameter	Operating	Storage
Temperature	-20 to +70°C (-4 to +158°F)	-40 to +70°C (-40 to +158°F)
Relative Humidity	5 to 95% (non-condensing)	5 to 95% (non-condensing)
Altitude	-300 to +3,000 m (-1,000 to +10,000 ft)	-300 to +12,000 m (-1,000 to +40,000 ft)
Vibration	0.75 m/S² (5 to 500 Hz)
Contamination	Class G3 (Harsh) environments (ISA S71.04)

Mounting & Weight

FBM241 Modules mount on a Modular Baseplate, which can be mounted on a DIN rail or a 19-inch rack.
Termination Assembly (TA) mounts on a DIN rail and supports multiple DIN rail styles (32 mm and 35 mm).

Component	Weight
FBM241 Module	Approx. 284 g (10 oz)
Termination Assembly	– Compression: 272 g (0.60 lb) to 454 g (1.0 lb) depending on type – Ring Lug/Knife Switch: 363 g (0.80 lb) to 908 g (2.0 lb)

Dimensions

Module Dimensions

Height: 102 mm (4 in), 114 mm (4.5 in) (including mounting lugs)
Width: 45 mm (1.75 in)
Depth: 104 mm (4.11 in)

Termination Assembly Dimensions

Compression Screw: Refer to page 20 for details.
Ring Lug and Knife Switch: Refer to page 22 for dimensions.

Part Numbers

FBM241c: RH914WM (supersedes P0914WM)

Termination Cables

Cable Length: Up to 30 m (98 ft).
Cable Materials: Polyurethane or Low Smoke Zero Halogen (LSZH).
Termination Cable Type: Type 4 or Type 4H.
Cable Connection: 37-pin male D-subminiature.

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