|
The model 485OP is compatible with Allen-Bradley, Data Highway,
DH and DH+
With the following restrictions:
- The model 485OP is used in a 2-wire mode.
- The maximum cable lengths are observed between units (see
table 1)
- The ends of the lines are terminated properly (see table
1)
Table 1
Termination
Link
Resistor Value  |
Communication
Rate (Kbaud) |
>Maximum
Cable
Length m (ft) |
| >150 |
57.6 |
3,048 (10,000)> |
| 150 |
115 |
1,542 (5,000) |
| 82 |
230.4 |
762 (2,500) |
|
DH+ Channel 1
3-Pin Interface (recommended) |
|
DH+ Channel 1
8-Pin Interface |
| Pin
Number |
Pin
Name |
| 1 |
>DH+
Data Line 1 |
| 2 |
Shield |
| 3 |
DH+
Data Line 2 |
|
|
| Pin
Number |
Pin
Name |
| 1 |
DH+
Data Line 2 |
| 2 |
No
Connection |
| 3 |
Shield |
| 4 |
+24
volts |
| 5 |
>No
Connection |
| 6 |
DH+
Data Line 1 |
| 7 |
+24
Volts Return |
| 8 |
No
Connection |
 |
|
