TDK-Lambda HWS 3000G - Page 23

INSTRUCTION MANUAL
HWS 3000G
TDK-Lambda
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3-3. Connection method when using communication function
3-3-1. Connection method when using multiple power supplies in conjunction
Wiring starts from the power supply that connects to the host device.
Connect between the RS-485 + terminal of the host device and the +D terminal (CN41 or CN42 pin No. 2) of the power
supply to be connected. Connect between the RS-485 - terminal of the host device and the -D terminal (pin No. 1 of
CN41 or CN42) of the power supply to be connected. Connect between the RS-485 signal ground (SG) terminal of the
host device and the DG terminal (pin No. 4 or pin No. 6 of CN41 or CN42) of the power supply to be connected.
Starting from the power supply connected to the host device, connect "+D terminals, -D terminals, and DG terminals" of
all power supplies. Make a short connection between the +D terminal and -DR terminal (CN41 or CN42 pin No. 3) of the
last power supply. Connect the A/O terminal (pin No. 5 of CN42) of the starting power supply to the A/I terminal (pin
No. 5 of CN41) of the second power supply. Connect the A/O terminal (pin No. 5 of CN42) of the second power supply
to the A/I terminal (pin No. 5 of CN41) of the n-th power supply (last power supply).
Connect the terminating resistor to the RS-485 port of the host device. The host device may have a built-in termination
resistor. Please refer to the instruction manual of the host device.
Connect the CB and VB terminals as necessary.
Use twisted or shielded signal wires.
TOPTOP
Host
device
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
CN61
CN42
1
2
3
4
5
6
7
8
9
10
CN71
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CN41
CN61
CN42
CN71
CN41
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
CN42
CN71
1
2
3
4
5
6
7
8
9
10
CN61
CN41
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Terminating
resistor
120Ω
Host device
RS-485 +
RS-485 －
RS-485 SG
n-th (last)
1st unit
2nd unit