RELAYS
FAN SAFETY ALARM CIRCUIT
RIBMNLB-1
2.75” Track Mount General Purpose Latching Logic
Circuit; One Latching/Fault Input (Dry Contact,
Class 2); 24 Vac/dc Power Input
Made in USA
Meets
“Buy American”
of ARRA 2009
Comm
24 Vac/dc
RESET
Power Input
Pushbutton
Latch/Fault
Power
Status
Status
N/C
SPECIFICATIONS
# Relays & Contact Type:
Expected Relay Life:
Operating Temperature:
Humidity Range:
Operate Time:
Green LED:
Red LED:
Dimensions:
Track Mount:
Approvals:
Relay Override Switch:
Gold Flash:
Fault Reset Switch:
24 Vac
LATC H
RESET
PB1
NC
BI
LT-A
BLKR
Auto-reset
Latch/Fault
Input
Com
N/O
N/O
Com
N/C
One (1) DPDT Continuous Duty Coil
10 million c
ycles minimum mechanical
-30 to 140° F
5 to 95% (noncondensing)
8ms
Power Status (ON: Power present)
Fault Status (ON: Latched/Fault State)
4.00˝ x 2.75˝ x 1.25˝
MT212-4 Mounting Track Provided, UL
Listed, UL864, C-UL
No
No
Yes
NH
Fault Input
Safety Latch Circuit Application
24 VAC/DC
H
N
Circuit must latch on power up.
Circuit must not relatch before or after fault has been cleared.
Circuit must only relatch when power is reset.
L
Indicator
RIBMNLB-1
Power
Latch
Circuit
• MANUAL RESET
• ONE ALARM OUTPUT
• ONE RELAY OUTPUT
Contact Ratings:
10 Amp Resistive @ 30Vdc
10 Amp General Use @ 277Vac
1/2 HP @ 120/240Vac (N/O)
1/3 HP @ 120/240Vac (N/C)
Power Input Ratings:
53 mA @ 24Vac
25 mA @ 24Vdc
50/60 Hz
L
Alarm
Indicator
LR1
LR1-1
LR1-2
LR1-3
LR1-4
Output
Alarm Fault Application:
When the Latch/Fault Input is Closed (Normal state), the Relay is
activated, and Red LED is O. When Latch/Fault Input Opens (Alarm
state), the Relay deactivates, and Red LED turns On. Until the Latch/
Fault Input is Closed AND either power is cycled or the RESET
button is pressed, relay will remain in the Alarm state.
Notes:
• Fault conditions must last for at least 500 ms in order for the
unit to go into Alarm state.
• Reset signal, whether via pushbutton or power cycling, must
last for at least 30 ms in order to reset the device to go from
Alarm state to Normal state.
24 VAC
H
N
Fault Input 1
HP-A
BI
2
1
P
LP-A
BI
2
1
P
HT-A
BI
2
1
BLKR
Man-reset
BLKR
Man-reset
BLKR
Man-reset
Fault Input 2
Fault Input 3
Fault Input 4
Power
L
Indicator
R1-1 R2-1 R3-1 R4-1
Input 1 Bypass
Input 2 Bypass
Input 3 Bypass
Input 4 Bypass
RIBMNLB-4 (ordered separately)
R5-2
R5-3
R4-1
R1-3
R1-2
R2-3
R2-2
R3-3
R3-2
R4-3
R4-2
Master
L
Power
Indicator
R5
R1
L
R2
L
R3
L
R4
L
Alarm
Indicator
Alarm
Indicator
Alarm
Indicator
Alarm
Indicator
Typically Used
for Fan Shutdown
2046
B C
LT-A
Status
HP-A
Status
LP-A
Status
HT-A
Status
LOCATED IN
BI
EAD-ES
BLKR
Typical Field Interlock Wiring
LOCATED IN SUPPLY FAN MCC PANEL FAN #1.
2046
4054
D A
A D
4054
A D
LOCATED IN RETURN / EXHAUST FAN MCC PANEL FAN #1.
4055
A D
LOCATED IN RETURN / EXHAUST FAN MCC PANEL FAN #2.
4055
A D
SDR-1
BO
A1 A2
BLKR
N.O.
C
LOCATED IN SUPPLY FAN MCC PANEL FAN #2.
SDR-1a
BO
A1 A2
BLKR
N.O.
C
SDR-2
BO
A1 A2
BLKR
N.O.
C
SDR-2a
BO
A1 A2
BLKR
N.O.
C
4054
C B
4054
C B
4055
C B
4055
C B
071417
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