Operating Rate Output : Tcb-Pcin4Ul - Carrier MMY-MAP0724FT9UL Service Manual

7-3-9. Operating Rate Output : TCB-PCIN4UL

At the output terminals, a signal is present (relay closed) or absent (relay open) in various combinations
according to the system operation factor, as shown in the diagram.
(The operation rate (FA) is the percentage ratio of the current output of the system to the maximum output (100%).)
Function
System operation
rate output
OFF
Bit 1: ON
Bit 2: OFF
off = Relay open
on = Relay closed
C2 Connection cable 2 (CN514)
CN514 Interface-side connector (green)
MONITOR Monitoring device
OUTPUT1 Output terminal for each function
Output terminal for each function
OUTPUT2
OUTPUT3 Output terminal for each function
PJ20 Connector on optional PCB side
TB1 Terminal block
* Connect the optional P.C. board to the header outdoor unit.
Note 1: Output Relay (K1, K2, K3) Contact Specifications
• Output terminals (OUTPUT1, 2, 3) must satisfy the following electrical rating.
• When connecting a conductive load (e.g. relay coil) to loads K1, K2 and K3, insert a surge killer CR (for an AC
power supply) or a diode for preventing back electromotive force (for a DC power supply) on the bypass circuit.
<Electrical Rating>
208-230 VAC, 10 mA or more, 1A or less
24 VDC, 10 mA or more, 1 A or less (non-conductive load)
Header outdoor unit
Outdoor unit
interface PCB
C2
SW16
CN514
ON
OFF
1 2 3 4
SW16 OUTPUT1
off
ON
on
1 2 3 4
off
on
off
on
off
on
Locally procured
Optional PCB
TB1
1
K1
OUTPUT1
2
3
PJ20 K2
OUTPUT2
4
5
K3
OUTPUT3
6
Shield
wire
OUTPUT2 OUTPUT3
off off
off off
on off
on off
off on
off on
on on
on on
– 78 –
(See "NOTE")
MONITOR
Operation factor (FA)
FA=0%
< <
0% FA 20%
20% FA < 35%
35% FA < 50%
<
50% FA 65%
<
65% FA 80%
<
80% FA 95%
95% FA