Optional Relays Required; Terminals 6 And 7; Fire System Power Formula; Figure 7: Relays For Terminals 7 And 8 And Ground Start - Radionics D9412G Operation And Installation Manual

D9412G/D7412G
Power Outputs
Voltage Output at Terminals 6, 7 and 8: If Terminals 6, 7, and
8 don't provide the expected output:
• Check the programming for Relays A, B, and C in the
Relays section of the program.
• Check the Bell Parameters section of the program to verify
the Alarm and Fire Bell responses are programmed for the
expected duration and pattern.
Check the Point Assignments to verify each point is
•
programmed for the expected local response.
5.4.2

Optional Relays Required

Install an optional D136 Plug-in Relay into the ALT ALARM
socket to enable the output at Terminal 7. Install a D136 in the
SW AUX socket to enable the output at Terminal 8. The relay
sockets are under the faceplate as shown in Figure 7 .
Relay Installation
Power down the system before inserting the D136 relays. The
plug-in relays are shorter than the sockets they plug into. See
Figure 7 . They can be installed in either the left or right end of
the socket.
Don't rely on relay labelling:
Don't rely on the labelling to install D136 relays. Check for the
side with three pins. The three pins go on the top side of the
socket.
Incorrect insertion does not damage the relay or the system,
however the related circuits do not function properly.
5.4.3

Terminals 6 and 7

Terminals 6 (Relay A) and 7 (Relay B), provide positive (+) 10.2
VDC to 13.9 VDC power output when activated. Use the power
at Terminals 6 and 7 to power bells, siren drivers, piezo fire
sounders, electronic horns, or other devices. Programming
determines the format of the output and the conditions that
activate it. One PTC protects Terminals 6, 7, and 8 against
shorts.
Available Power
The system combines the 1.4 amp of primary power produced by the power supply with the secondary power
source (the battery) to produce a total of 2.0 amp of alarm power at 10.2 to 13.9 VDC. Terminals 6 and 7 share the
available alarm power.
Power restricted for fire and combined fire/burglary systems: Fire systems are prohibited from using the
battery for determining alarm power. Use the Fire System Power Formula below to calculate the current available
for fire and combined fire/burglary systems.
5.4.4

Fire System Power Formula

To calculate the current available at Terminals 6 and 7 for fire and combined fire/burglary systems:
1. Add together the current draws for all devices connected to Terminals 3, 8, 24, and 32, and the Accessory
Connector. This total is the total current required for the Normal Standby Condition (NSC).
2. The current available for NSC is 1.4 A. Subtract the NSC current required calculated in step 1 from the NSC
current available, 1.4 A. The difference is the Alarm Current available for Terminals 6 and 7.
In formula format:
1.4 A – NSC current required (step 1) = Alarm Current available
Refer to the D9412G/D7412G Approved Applications Compliance Guide for module/accessory current
requirements.
43488D
D9412G/D7412G Operation & Installation Guide
Page 30
TOP
L
E
F
T
NOTE:
The D136 Relays
are inserted with
the three pins
towards the TOP
side.
BOTTOM
Figure 7: Relays for Terminals 7 and 8 and
Ground Start
ALT ALARM
SW AUX
GND START
© 2002 Radionics