Call us now: 
Cart
Industrial Contact Closure System Transports 4 Signals Over Fiber​
The system provides transmission of four (4) independent input signals over fiber optic cable. Applications include alarm event triggering, building automation, environmental control systems, fire & alarm systems, gate control, traffic signal control equipment, and more.
Fiber optic cable is immune to RF noise, EMI, high voltages, and may extend the signal up to 100km. A complete system requires a Transmitter and Receiver, a 24-48VDC power source, and a compatible SFP transceiver for the fiber interface.
Each unit features a wide operating temperature, redundant power terminals, and a system alarm contact for monitoring the unit for proper operation. LED indicators provide a convenient view of the systems current status. This hardened system can be wall or DIN rail mounted with the included DIN clip and wall mount ears, is made in the USA, and backed by our Limited Lifetime Warranty.
Contact Input – Transmitter Device
The input terminals have the ability to sense 4 independent inputs. The dry contact model makes installation of the unit quick and simple. Wet contact models have the ability to receive an input signal between 5~12VDC or 24~48VDC.
Contact Output – Receiver Device
Each receiver device is paired with a transmitter on the opposite end of the system. The relays will be factory set to Normally Open or Normally Closed and for both these options the switching power is rated at 60Watts (DC or AC).
Features
- Hardened to operate in -40°F to +158°F (-40°C to +70°C)
- Compact DIN (T35) rail mount enclosure
- Can be powered by 24-48VDC (12VDC and 125VDC power options also available)
- Redundant power inputs with polarity reversal protection, 1.5kV isolation
- SFP transceiver interface
- Each output relay is rated for 60 Watts. (Available with NO or NC relays)
- Inputs can sense a Dry Contact closure
- Wet Inputs can accept a DC voltage On/Off Signal between 5-12 Volts or 24-48 Volts
- Each Input is optically isolated, 3.5kV
- Both sides include alarm contacts for status monitoringConvenient LED status indicators
- Pluggable terminal blocks
- Critical, high voltage, remote or un-manned locations operating 24/7/365
- Limited Lifetime Warranty
- Made in USA
Please see the product documentation for the complete list of specifications
Fiber Connector Type:
SFP Transceiver
Compatibility:
RLH 155Mbps SFP Modules, MSA Compliant SFPs
LED:
PWR, STS, LNK, and Inputs 1~4 (TX) or Outputs 1~4 (RX)
Power Input:
24-48VDC (Polarity Insensitive)
Dual redundant power inputs
*12 VDC and 125 VDC powering options also available
Power Consumption:
6 Watts Max
Wire Connectors:
Screw down terminal block, 16-26AWG
Inputs 1-4:
Option (DR) – Dry Contact Sensing
Option (12) – Wet: 5-12VDC
Option (48) – Wet: 24-48VDC
Outputs 1-4:
Option (NC) – Normally Closed
Option (NO) – Normally Open
Output Relay Contacts Maximum Rating:
115AC 1.087A 125VA
12VDC 3.000A 36 Watts
24VDC 2.500A 60 Watts
48VDC 1.250A 60 Watts
130VDC 0.462A 60 Watts
250VDC 0.240A 60 Watts
System Alarm Output:
Normally Open / Closed Relay
Relay Response Time:
5ms typical, 10ms maximum
Surge Protection:
Varistors, Automatic resettable fuses
DC Input Isolation:
1.5kV
Construction:
Powder coated steel and aluminum alloy
Temperature:
-40°C ~ 70°C (-40°F ~ 158°F)
Operating Humidity:
95%
MTBF:
175,000 Hours
Dimensions:
H 4.93″ x W 1.2″ x D 3.93″ (Not including DIN clip or Connectors)
Mounting:
Standard T35 DIN rail or wall mounted with included ears
General Information
Guide
4CD-TX-DR-3
4CD-TX-12-3
4CD-TX-48-3
4CD-RX-NO-3
4CD-RX-NC-3
SFP-155-04-2
SFP-155-30-2
SFP-155-31-2
SFP-155-34-2
SFP-155-20-2
SFP-155-21-2
SFP-155-24-2
SFP-155-25-2
For product questions, volume pricing and/or delivery outside of the US and Canada, please contact sales.
Ordering
4 Channel Contact Closure SFP
| Product configuration | Transmitter/Receiver | Inputs | Input Type | Outputs | Output Type | Part number | Price | |
|---|---|---|---|---|---|---|---|---|
| 1 SFP Slot, 4 Digital Inputs - Dry Contact Sensing, Powering Voltage 24-48 DC | Transmitter | 4 Digital Inputs | Dry Contact Sensing | N/A | N/A | 4CD-TX-DR-3 | $475.00 | |
| 1 SFP Slot, 4 Digital Inputs - 3-15VDC Sinking, Powering Voltage 24-48 DC | Transmitter | 4 Digital Inputs | 5~15VDC | N/A | N/A | 4CD-TX-12-3 | $475.00 | |
| 1 SFP Slot, 4 Digital Inputs - 24-48VDC Sinking, Powering Voltage 24-48 DC | Transmitter | 4 Digital Inputs | 24~48VDC | N/A | N/A | 4CD-TX-48-3 | $475.00 | |
| 1 SFP Slot, 4 Relay Outputs - Normally Open, Powering Voltage 24-48 DC | Receiver | N/A | N/A | 4 Relay Outputs | Normally Open | 4CD-RX-NO-3 | $475.00 | |
| 1 SFP Slot, 4 Relay Outputs - Normally Closed, Powering Voltage 24-48 DC | Receiver | N/A | N/A | 4 Relay Outputs | Normally Closed | 4CD-RX-NC-3 | $475.00 |
- A complete system requires one Transmitter and one Receiver
- SFP Transceivers are sold separately (see list below)
- For the 125VDC input power option, please note your part number, add -A to the end, and get your quote here
- For the 12VDC input power option, please note your part number, add -B to the end, and get your quote here
155M SFP Transceiver
| Short description | Mode | Connector | Distance | Fibers | Wavelength | Part number | Price | hf:att:pa_distance | hf:att:pa_fibers | |
|---|---|---|---|---|---|---|---|---|---|---|
| Multimode, LC, 2km/1.2 miles, Dual Fiber, 1310nm | Multimode | LC | 2km/1.2 miles | Dual Fiber | 1310nm | SFP-155-04-2 | $65.00 | 2km-1-2-miles | dual-fiber | |
| Singlemode, LC, 20km/12.4 miles, Dual Fiber, 1310nm | Singlemode | LC | 20km/12.4 miles | Dual Fiber | 1310nm | SFP-155-30-2 | $85.00 | 20km-12-4-miles | dual-fiber | |
| Singlemode, LC, 60km/37 miles, Dual Fiber, 1310nm | Singlemode | LC | 60km/37 miles | Dual Fiber | 1310nm | SFP-155-31-2 | $120.00 | 60km-37-miles | dual-fiber | |
| Singlemode, LC, 100km/62 miles, Dual Fiber, 1550nm | Singlemode | LC | 100km/62 miles | Dual Fiber | 1550nm | SFP-155-34-2 | $280.00 | 100km-62-miles | dual-fiber | |
| Singlemode, LC, 20km/12.4 miles, Single Fiber – Side A, Tx1310/Rx1550 | Singlemode | LC | 20km/12.4 miles | Single Fiber - Side A | T-1310/R-1550 | SFP-155-20-2 | $105.00 | 20km-12-4-miles | single-fiber-side-a | |
| Singlemode, LC, 20km/12.4 miles, Single Fiber – Side B, Rx1310/Tx1550 | Singlemode | LC | 20km/12.4 miles | Single Fiber - Side B | R-1310/T-1550 | SFP-155-21-2 | $105.00 | 20km-12-4-miles | single-fiber-side-b | |
| Singlemode, LC, 60km/37 miles, Single Fiber – Side A, Tx1310/Rx1550 | Singlemode | LC | 60km/37 miles | Single Fiber - Side A | T-1310/R-1550 | SFP-155-24-2 | $140.00 | 60km-37-miles | single-fiber-side-a | |
| Singlemode, LC, 60km/37 miles, Single Fiber – Side B, Rx1310/Tx1550 | Singlemode | LC | 60km/37 miles | Single Fiber - Side B | R-1310/T-1550 | SFP-155-25-2 | $170.00 | 60km-37-miles | single-fiber-side-b |
- Single fiber (bi-directional) SFP transceivers must always be paired, side A and side B
You May Also Be Interested In
You may also like…
-
155M SFP Transceiver
Small Form Factor Pluggable (SFP) Optical Transceivers certified for use in RLH SFP products.
View ProductSwitch Accessories – Transceivers155M SFP Transceiver
$65.00 – $280.00 View Product This product has multiple variants. The options may be chosen on the product page -
DIN Rail Housing
The DIN Rail industrial housing is a steel, powder coated, enclosure with a hinged door for equipment access.
View ProductAccessories for Ethernet IODIN Rail Housing
$295.00 – $490.00 View Product This product has multiple variants. The options may be chosen on the product page -
4 Channel Bi-Di Contact Closure SFP
The 4 Channel Bi-Directional System provides two-way transmission of 4 signals (Wet or Dry) over fiber.
View ProductFiber Optic Converters4 Channel Bi-Di Contact Closure SFP
$565.00 View Product This product has multiple variants. The options may be chosen on the product page -
Industrial AC/DC + DC/DC Switching 48 Watt Power Supply
A compact 48 Watt industrial DIN-rail power supply with a universal input of 100-240VAC/120-370VDC.
View ProductAC/DC Power SuppliesIndustrial AC/DC + DC/DC Switching 48 Watt Power Supply
$55.00 View Product This product has multiple variants. The options may be chosen on the product page -
Fiber Optic Patch Cords
RLH Fiber optic patch cords are made with Corning® glass. Available with riser or plenum Jacketing and a wide variety of connector and lengths options.
View ProductFiber Patch CordsFiber Optic Patch Cords
$11.00 – $24.00 View Product This product has multiple variants. The options may be chosen on the product page
*Lead times are estimates and may vary. You will be contacted within 1 business day to go over the details of your order. If you require a specific date, let us know!
*Days = Business Days