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RS-422 Control Connectors (PRC CONTROL, SERIAL 4)
These DB9-Male connectors provide RS-422 serial communication interfaces. See Figure 9 for an
orientation view showing contact locations.
•
PRC CONTROL is connected to COM 3 on the internal system controller. PRC CONTROL
is the communications interface to a PRC type routing switcher system and is connected to a
routing switcher with an AT Serial Modem cable (Part No. 81-9028-0400-0). If necessary, a
cable up to 4000 feet in length may be fabricated in the field as shown in Figure 10 on
page 14.
•
SERIAL 4 is connected to COM 4 on the internal system controller. SERIAL 4 is an RS-422
CPU Link similar to the RS-232 CPU Link, except the cable may be up to 4000 feet in length
and an RS-422 interface card must be installed in the expansion bus. SERIAL 4 may be used
with any of the protocols shown in Table 3. Consult the manual for your system controller to
determine how to set the communication rate. If necessary, a cable may be fabricated in the
field as shown in Figure 11 on page 14.
CPU Link Protocol No. 1 (P1)
CPU Link Protocol No. 1 Extensions (P1E)
Unsolicited Status Protocol (USP)
Truck Link Protocol (TRK)
Chapter 2 – Installation
Tiger Video Routing Switcher
Although two system controllers may be installed in a Tiger
Video Routing Switcher, only one will be active at any given
time. PRC CONTROL and SERIAL 4 will only communicate
with the active system controller. The active controller will
then relay any required data to the standby controller. For
more information, please consult the manual for your system
controller.
Table 3. PESA CPU Link Protocols
Protocol
Figure 9. PRC CONTROL, SERIAL 4 Connectors
NOTE
Document No.
81-9062-0407-0
81-9062-0408-0
81-9062-0409-0
81-9062-0410-0
13
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