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HAT552/HAT553 DUAL POWER ATS CONTROLLER USER MANUAL
HAT552/HAT553 ATS Controller 2020-05-14 Version 1.1 Page 28 of 35
Table 22 Terminal Function Description
No.
Functions
Description
Remark
1
BT2
B disconnects output N
Output AC power; control B power switch to
disconnect, rated 8A.
2
BT1
B disconnects output L
3
AT2
A disconnects output N
Output AC power; control A power switch to
disconnect, rated 8A.
4
AT1
A disconnects output L
5
B2
B puts into output N
Output AC power; control B power switch to
disconnect, rated 8A.
6
B1
B puts into output L
7
A2
A puts into output N
Output AC power; control A power switch to
disconnect, rated 8A.
8
A1
A puts into output L
9
R
A-INPUT
AC 3 Phase 4 Wire voltage
input of A power
For single phase input, only connect R and
AN.
10 S
11 T
12 AN
13 R
B-INPUT
AC 3 Phase 4 Wire voltage
input of B power
For single phase input, only connect R and
BN.
14 S
15 T
16 BN
17
AUX. OUTPUT
Programmable output 1
Default: common alarm output, N/O output,
capacity 8A 250VAC
18
19
GENSET START
Genset start control output
port
N/C output, capacity 8A 250VAC
20
21 A(+)
RS485 communication port
120
Ω Resistor (for impedance matched)
has been connected inside.
22 B(-)
23 120
Ω Resistor
RS485 impedance matched
resistor
Users need to connect this terminal to
Terminal 21 based on on-site network
arrangement; used to connect with the 120
resistor inside the controller.
24 ASW1
A switch close status input
Detect A switch close status, volt free
contact input, active when ASW1 and ASW2
are short connected.
25 ASW2
26 BSW1
B switch close status input
Detect B switch close status, volt free
contact input, active when BSW1 and BSW2
are short connected.
27 BSW2
28 FORCE OPEN
Forced to Open input
Force to open, active when it is short
connected.
29 COM
30 AUX. INPUT 1
Programmable Input 1
Default: Not used, active when it is short
connected.
31 INPUTCOM
USB USB
D form USB communication
port
Configure parameters and upgrade program
by connecting with PC.