Product specifications
Installing PM891 in Single Configuration Section 2 Installation
88 3BSE036351-510 A
6. Connect the optical ModuleBus to the optical contacts (Tx1/Rx1) at the bottom
of the processor unit (see
Figure 10 on page 43). For information regarding
optical cable selection and cable length, refer to the S800 I/O documentation.
7. Provide battery backup by connecting the PM891 unit to the external SB822
battery unit. Install it according to the instructions in
Installing the SB822
Rechargeable External Battery Unit on page 144.
Communication Ports - CN1 and CN2
The control network connects to one or two RJ45 connectors (CN1 and CN2)
depending on network option (single or redundant).
Use an RJ45 connector for IEEE802.3 (Ethernet) for connecting to a category 5
Shielded Twisted Pair cable (STP class 5).
The connection to the optical ModuleBus is identical to that for the processor unit
and for the FCI in S800 I/O (see
Figure 54 on page 160.)
Class 5, or higher, cable 10/100BaseT/TX max 100 m (110 yd). ABB recommends
the use of optical fiber in an industrial environment, for example 62.5/125
100BaseFX, max. distance 1500 m (1600 yd).
Table 8. TP830 CN1 and CN2 Connections (RJ45 connectors)
Pin Designation Direction Description
1 TD+ Out Transmit Data (plus)
2 TD- Out Transmit Data (minus)
3 RD+ In Receive Data (plus)
4–5 – – Not used
6 RD- In Receive Data (minus)
7–8 – – Not used
Housing Shield – Shield