26
Table 7 – RS422/RS485 Pinouts on DB25S Connector
Identification
Pin Numbers
RS422/RS485 4 wire TD(+) input
11
RS422/RS485 4 wire TD(-) input
10
RS422/RS485 4 wire RD(+) output
13
RS422/RS485 4 wire RD(-) output
12
RS485 2-wire Data (+) input/output
11
RS485 2-wire Data (-) input/output
10
Ground
7
2.7.3
Expansion Port
When using the expansion port to branch the network, wire the EXP port to the DB25 port on a second
Model 9525A. See the figure below for cable wiring diagram. NOTE: The extended 9525A must be in
RS232 mode and the electrical side anti-streaming must be disabled.
9525A EXP port
9525A DB25 Port
Table 8 – RJ12 Expansion Port Pinouts
1
Signal Ground
2
Transmit Data (TD)
Input
3
Receive Data (RD)
Output
4
N/C
5
Primary power voltage output under primary power, battery voltage if
operating under battery back-up.
Output
6
N/C
2.8 POWER WIRING
2.8.1
DC POWER SOURCE CONNECTION
Connect the DC power source as required per the Specification, Section 1.4, to the two PWR screw
terminals on the front panel. Refer to the markings on the chassis top above the terminals. An optional
110 VAC to 9 VDC power adapter, Model 9014PS, may be used when 110 VAC power is available.
Summary of Contents for 9525A
Page 2: ......
Page 12: ...12 FIGURE 1 MODEL 9525A ENGINEERING VIEWS AND DIMENSIONS...
Page 16: ...16 FIGURE 3 FAULT TOLERANT RING ARCHITECTURE...
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