User's Manual

Networking Gateways and Receivers (Token Ring Network) Installing the RF Gateway • 9
2.4. Networking Gateways
and Receivers (Token
Ring Network)
The RS485 Token Ring Network intercon-
nects all RF Gateways and Receivers on the site.
Like the RS485 I/O Networks that interconnect
the area controllers, input boards, output boards,
and RF Gateways, the Token Ring Network
must be set up in a daisy chain configuration.
All devices must be wired together in a single
chain as shown in Figure 2-7, with no branches
and with no device connected to more than two
other devices.
2.4.1. Wiring the Token Ring Net-
work to the Gateway
Using shielded three-conductor cable
(Belden #8641 or equivalent), wire the RF Gate-
way to the Token Ring Network as shown in
Figure 2-8.
2.4.2. Setting the Token Ring Net-
work Termination Jumpers
As shown in Figure 2-7, the Token Ring
daisy chain must be terminated at the two
devices at the end of the chain. The location of
the termination jumpers on the RF Gateway are
shown in Figure 2-9. To terminate an RF Gate-
way, set the jumpers to the LEFT position. To
unterminate the RF Gateway, set the jumpers to
the RIGHT position.
Figure 2-7 - Daisy Chain Configuration - Token Ring Network
Figure 2-8 - Token Ring Network Wiring
Figure 2-9 - RS485 Token Ring Network Termination