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P/N 3101648 • REV 1.0 • ISS 03JAN12 

 

51XBRF Series Flashing LED Signal 

Installation Sheet 

 

Description 

The 51XBRF Series Flashing LED Signals are AC and DC 
operated combination flashing LEDs with horns. They feature 
optically designed polycarbonate lenses. These signals are 
suitable for installation in a permanent outdoor or indoor 
application. Their base allows direct surface mounting, 
mounting on 1/2 in. NPT conduit, or mounting on a 4 in.  
(102 mm) octagon box. A hardware kit is included with the 
signals for direct surface mounting applications. 

Replacement horns, flasher modules, and lenses are available 
for the signals. Refer to the table at the end of these 
instructions for details. 

PLC compatibility 

The electrical input load requirements for PLC compatible 
signaling devices are listed in Table 1. Signaling devices may 
be directly connected to output cards that meet the input load 
requirements.  

Table 1: PLC compatibility 

Catalog number  

51XBRF*120A   51XBRF*24D  

Operating voltage  

120 VAC  

24 VDC  

Off state leakage current 

10 

mA max.

 10 

mA max.

 

Continuous on current  

175 

mA

 275 

mA

 

Surge (inrush/duration)  

50 A / 260 

µs

  

10 A / 120 

µs

 

The letter in this position signifies lens and LED color: A = amber, B = 
blue, W = white, G = green or R = red  

Installation 

Install this unit in accordance with the latest edition of the 
NFPA 70 

National Electrical Code 

and local codes. Prior to 

mounting the signal base, the signal must be removed from the 
base. The base can be mounted using one of the following 
methods: 

• Direct 

surface 

mount 

• 

Mounted on 1/2 in. NPT conduit 

• 

Mounted on a 4 in. octagon box 

WARNINGS 

• 

To prevent electrical shock, ensure that power is 
disconnected before installing the signals. 

• 

To prevent leakage and potential electrical shock, use 
care when disassembling the signal to prevent tearing of 
the permanently affixed gaskets provided for 
weatherproofing. 

To remove the signal from the base: 

1.  Remove the screw in the clamp ring, and then remove the 

ring. See Figure 1. 

2.  Carefully lift the lens/lamp assembly off the base.  

3.  Install the signal base using one of the following mounting 

procedures. 

Figure 1: 51XBRF series flashing light with horn 

 

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