Omron E5ZN - Page 31

17
Using the I/O Section Section 2-2
Communications • When communicating with a host, connect across terminals 23 and 24.
• The RS-485 connection can be either one-to-one to one-to-N. Up to 16
Temperature Controllers can be connected in one-to-N systems.
• Keep the total cable length to 500 m maximum.
■ Isolation
The E5ZN terminals are electrically isolated in the blocks shown below.
• Use shielded, twisted-pair cable (with wire sizes of AWG 28 or larger).
Cable
7
8
9
1
2
3
19
20
21
13
14
15
22
23
24
16
17
18
10
11
12
4
5
6
E5ZN-SCT24S-500
24
23
B(+)
A(−)
RS-485
E5ZN-SCT18S-500
19
20
21
13
14
15
7
8
9
1
2
3
22
23
24
16
17
18
10
11
12
4
5
6
13
14
15
7
8
9
1
2
3
16
17
18
10
11
12
4
5
6
A
AB
C
C
G
A B
A
C
F
Current output model
E5ZN-2C@F03@-FLK
F
E5ZN-SCT24S-500
19
20
21
13
14
15
7
8
9
1
2
3
22
23
24
16
17
18
10
11
12
4
5
6
13
14
15
7
8
9
1
2
3
16
17
18
10
11
12
4
5
6
D
AB
C
C
GF
A B
D
C
F
Transistor output model
E5ZN-2T@H03@-FLK
EE
E5ZN-SCT24S-500 E5ZN-SCT18S-500
19
20
21
13
14
15
7
8
9
1
2
3
22
23
24
16
17
18
10
11
12
4
5
6
13
14
15
7
8
9
1
2
3
16
17
18
10
11
12
4
5
6
A
AB
C
C
GF
A B
A
C
F
Voltage output model
E5ZN-2Q@H03@-FLK
E5ZN-SCT24S-500 E5ZN-SCT18S-500
HH
AWG 28 or larger
0.081 mm
2
or larger
conductor cross-section