Siemens SIMATIC TIWAY 1 - Manual (Page 3)

THE UNILINK HOST ADAPTER
UNILINK HOST ADAPTER 1–2
USER MANUAL
1.2 FEATURES
The hardware is composed of the UNILINK Adapter, shown in Figure 1–1, with
a plug-in Personality Interface Module (PIM) PPX:500–6224. The PIM, shown
in Figure 1–2, contains the software that causes the UNILINK Adapter to
operate as the UNILINK Host Adapter.
Figure 1–2 Personality Interface Module (PIM)
Figure 1–3 illustrates the basic structure of the UNILINK Host Adapter. The
corresponding physical features are shown in Figure 1–4. It includes an
RS–232–C/RS–423–A compatible host port that supports the Non-Intelligent
Terminal Protocol (NITP) used by the original TIWAY I Host Adapter, or the
BDLC protocol, an advanced, byte-oriented subset of the HDLC protocol. Also,
there are two TIWAY I interface ports and an external I/O point block.