Siemens FS-RU2, Installation Instructions & User Manual

P/N 315-049308-6 

2

Step 13.)  Connect relay contacts, as required. 

Step 14.)  Apply power to system. 

Step 15.)  Program control unit for required relay operation. 

Step 16.)  Check for proper operation of functions. 

FS-RU2 / FS-RE8 WIRING 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Notes: 
1.) 

Units to be installed in accordance with all local codes. 

2.) 

T-Tapping is not allowed!  Communication wiring must be daisy chained from unit to unit. 

3.) 

Terminal block will accept 12 AWG to 18 AWG wiring. 

4.) 

Use twisted pair cable with a characteristic impedance of approximately 120 ohms.  4000 feet maximum distance from 
end to end.

5.) 

Power Limited wiring must be kept separate from non-power limited wiring, ¼ “ minimum. 

6.) 

All wiring to P2 on the remote processor board must be in the same enclosure. 

7.) 

The following table gives the currents necessary for power supply and battery calculations. 

Model 

Standby Current 

Alarm Current 

Voltage 

FS-RU2 

0.032 A 

0.192 A (All relays activated) 

24VDC nominal, filtered 

FS-RE8 

0.000 A 

0.170 A (All relays activated) 

24VDC nominal, filtered 

FS-RU2 ADDRESS SETTING 

Address 

Switch 1 

Switch 2 

Switch 3 

Switch 4 

1  On On On Off 
2  Off On On Off 
3  On Off On Off 
4  Off Off On Off 
5  On On Off Off 
6  Off On Off Off 
7  On Off Off Off 
8  Off Off Off Off 

PROCESSOR BOARD HEADER CONNECTIONS 

Pin 

P2 - Processor Board 

1 

24V Output (+) 

2 Not 

Used 

3 

Lamp Test Switch 

4 

Alarm Silence Switch 

5 

Trouble Acknowledge/Silence Switch 

6 

System Reset Switch 

7 

Remote Buzzer Output (open collector) 

8 

Alarm Silence Output (open collector) 

9 

Trouble Output (open collector) 

10 

24V Output (-) or GND 

SW-1 

OFF ON  

1 
2 
3 
4

Programmable Relay Contacts 

(Shown in normal standby condition) 

1A@28VDC max., Resistive 

For Power Limited Source, Unsupervised 

Power Limited, Supervised 

Cable for power (+ & -) and Twisted 
pair Cable for data (X+ & X-) from 
panel or previous remote. 

Cable for power (+ & -) and twisted 
pair Cable for data (X+ & X-) to next 
remote or 120 ohm E.O.L. Resistor 
Assembly (P/N 140-050008-1) on the 
last remote. 

TB3 allows for connection to an 
external regulated and power limited 
24VDC power supply, listed for fire 
protective signaling use.   

A = Common (Armature) 
C = Normally Closed 
O = Normally Open