4: Using An Mr-201/T Control Relay From Air Products - Honeywell IFP-75 Installation & Operation Manual

Remote Station Applications
Remote
Indicator
4.15.4 Using an MR-201/T Control Relay From Air Products
When the MR-201/T control relay is wired for polarity reversal, it reports alarm and trouble events to a remote site. Alarms will override
trouble conditions and it will not be possible to reset the remote indicator until the condition is cleared and the control panel is reset.
If an alarm condition occurs, the alarm relay will close, overriding the trouble condition.
Current:
Operating Voltage:
Resistance:
To install the MR-201/T for polarity reversal, follow the steps below:
1. Wire the MR-201/T as shown in Figure 4.53.
.
Intended for Connection to a
Polarity Reversal Circuit of A
Remote Station Receiving Unit
Having Compatible Rating.
To Remote
Receiving
Station
2. Program the NAC circuit for non silence NAC circuit (see Section 8.5).
NOTE: If you need to transmit supervisories or trouble conditions, additional relay modules must be added. Use the Relay 1 to transmit
supervisory conditions. Use the trouble relay to transmit trouble conditions.
IFP-75/IFP-75HV Installation/Operation Manual — P/N LS10147-001SK-E:D 06/25/2021
Control Panel
Board Assembly
RELAY 2
RELAY 1 TROUBLE
NO C NC NO C NC
NO
+
-
Figure 4.52 Polarity Reversal Connection Using the 7644-L8
15mA max.
24VDC nominal; 27.4 VDC max.
4KΩ
RELAY 2 RELAY 1
NO C NC
NO C
UL Listed
Figure 4.53 Polarity Reversal Connection Using the MR-201/T Relay
SLC IN SLC OUT SLC PROG
SBUS
_
_ _ _
C NC + + + +
White
Black
7644-L8
SLC OUT SLC PROG
TROUBLE SLC IN
_ _
NC NO C NC
+ +
EOL
NAC 1 NAC 2
A
B
1k
Black
NAC 1
SBUS
_
_
A
B
+ +
UL Listed
EOL
MR-201
Control Panel Installation
White
7644-L8
NAC 2
4.7 K
EOL
53