26
SafeGuard Controller User Manual
MAN-0115 Rev 0
described in section 2.3.2. Many SafeGuard Controller applications utilize the common
alarm relays (see section 3.0) and do not require discrete relays for each of the 48 alarm
events (16 A1’s, 16 A2’s & 16 A3’s). If discrete relays are needed for all 48 alarms, then
six PCB’s are required.
5 VDC power to the discrete relay option PCB’s is normally supplied from the SafeGuard
Controller via the slender I
2
C cables connected to J2 and J3. However, I
2
C cables are
limited in ability to carry this power further than a few feet without a significant voltage
drop. Some SafeGuard Controller applications with relays for all 48 alarms may require
up to 6 boards. TB2 allows a heavier 5VDC power cable to be connected from terminals
on the back of the SafeGuard Controller front panel assembly, bypassing the I
2
C cable.
A 20AWG pair connected to only one of the several TB2’s is sufficient when these
boards are in close proximity to each other.
All relays are rated at 5 Amp for 28 VDC and 250 ~VAC
RESISTIVE
loads.
IMPORTANT: Appropriate diode (DC loads) or MOV (AC loads) snubber devices must
be installed with inductive loads to prevent RFI noise spikes. Relay wiring should be
kept separate from low level signal wiring.
!
TB2
+
-
5VDC ONLY!
ASSY# 10-0195 8-CH DISCRETE RELAY
TB1
JUMPERS
ZONE
JP4
U2
J2
J3
Ch6
Ch7
Ch5
Ch8
Ch3
Ch1
Ch2
Ch4
S1 controls if discrete relays are tripped by
A1, A2, or A3 alarms for Ch’s 1-8 or 9-16.
See Chart.
JP4 allows “zoning” of adjacent
channel alarms. All zoning jumpers
are placed vertically. Dwg. exhibits
channels 1-4 and channels 5-7
creating 2 zones. All relays in a zone
switch together. Unused jumpers
may be stored horizontally.
J2 & J3 are interchangable I2C
connectors used to add option
PCB assemblies to the controller.
TB2 is used to supply external
5VDC power to Alarm boards
when they are mounted > 5
feet from the controller. I2C
cables provide 5VDC but losses
occur with longer cable lengths.
WARNING: Voltages exceeding
6 volts may cause extensive
damage to entire controller.
CH1/9
CH3/11
CH7/15
CH5/13
NC
NO C
NO
NC
C
NO
NO C
NC
C
NC
CH2/10
CH4/12
CH8/16
CH6/14
NC
NO C
NO
NC
C
NO
NO C
NC
C
NC
5 amp form C dry contacts. Contacts are unfused. Switching
inductive loads may create high levels of RFI. Use appropriate
“RFI Snubbers” on inductive load devices.
8 Channel Discrete Relay Option #10-0195
U1
U3
Q2
SB1
SB2
0
WITH 8 RELAYS:
S1 selects Ch’s 1-8
or 9-16 for A1, A2 &
A3 (Flt) See chart--->
S1
S1-2=Ch9-16 A1
S1-3=Ch9-16 A2
S1-4=Ch9-16 A3
S1-5=Ch1-8 A1
S1-6=Ch1-8 A2
S1-7=Ch1-8 A3
8-CH CHART
Wire TO CPU
5VDC if > 5’
from controller
Install
vertically
to create
Ch. zones
Standard configuration has a 1
minute POWER ON time delay
preventing relay actuation during
the delay. SB1 increases delay
time to 8-minutes. SB2 removes
all time delay.
8 channel discrete relay Option Board Part # SG10-0195
Figure 3.4
JP4 allows “zoning” of adjacent
channel alarms. All zoning jumpers
are placed vertically. Jumper
positions as seen create one zone
for Channel 1 - Channel 4, and
another zone for Channel 5 -
Channel 7. All relays in a zone
switch together. Unused jumpers
are placed horizontally.
