C
HEETAH
S
ERIES
S
WITCHERS
–
C
HAPTER
11
81-9059-0570-0
Rev. C
Proprietary Information of
PESA
S
WITCHING
S
YSTEMS
,
I
NC
.
166
11.9.4
PRC Loop Connector
This five-contact connector, located on the rear of the unit, is a loop-through connector used to
provide an RS-422 serial communication interface using the PESA PRC Protocol (Document No. 81-
9062-0316-0). It is wired in parallel with the DB-9-Male PRC Loop connector. Contact locations are
illustrated in Figure 77.
ALARM
SYSTEM CONTROL
ALARM
RCP PANEL PORT
4
3
2
1
NETW ORK
OUTPUT MONITOR
AUX FRAME CTRL
SLOT B
3
SLOT A
REFERENCE
1
1
2
4
2
FRAME
ALARM
FRAME
CONTROL
SYSTEM
CONTROL
3
4
PRC LOOP
COM 4
COM 3 / PRC
COM 1
COM 2
5
4
3
2
1
FIGURE 77: PRC Loop Connector
PRC Loop may be connected to PESA PRC-type equipment with a cable assembly (Part No. 81-9028-
0395-0) constructed as shown in Figure 78.
81-9029-0813-0 to
PRC Control Connector
System Controller Tx+ (High)
System Controller Tx- (Low)
Chassis Ground
System Controller Rx+ (High)
System Controller Rx- (Low)
1
2
3
4
5
System Controller Tx+ (High)
System Controller Tx- (Low)
Chassis Ground
System Controller Rx+ (High)
System Controller Rx- (Low)
1
2
3
4
5
81-9029-0813-0 to
PRC Type Connector
FIGURE 78: RS-422 System Expansion Cable
5 4 3 2 1
Summary of Contents for Cheetah 1024x256
Page 235: ......
