User's Manual

Technical Specifications
RFI-148 & RFI-900 High Output Power Paging Transmitters User Manual Page 62 of 134
30
Alarm 6
Alarm 6
Output
ALM6
ALM6
31
Alarm 8
Alarm 8
Output
ALM8
ALM8
32
+5 V
+5 V
Output
nc
nc
33
+5 V
+5 V
Output
nc
nc
34
+12 V
RFI-148
+12 V
Output
nc
nc
RFI-900
+24V
35
+12 V
RFI-148
+12 V
Output
nc
nc
RFI-900
+24V
36
+24 V nominal (Note:
identical to DC input
voltage for 24 VDC
model)
RFI-148
+24 V nominal (Note:
identical to DC input
voltage for 24 VDC
model)
Output
nc
nc
RFI-900
nc
11
37
+24 V nominal (Note:
identical to DC input
voltage for 24 VDC
model)
RFI-148
+24 V nominal (Note:
identical to DC input
voltage for 24 VDC
model)
Output
nc
nc
RFI-900
nc
11
Table 21: LIU Interface Pin Out
Non-exciter-based build
Exciter-based build
Interface standards
5 V CMOS
5 V TTL (with modification)
3.3 TTL (with modification)
3.3 CMOS (with modification)
5 V CMOS
5 V TTL
3.3 TTL
3.3 CMOS
Input resistance
Schmitt trigger with internal
33 KΩ pull-up.
Schmitt trigger with internal
100 KΩ pull-up (148P306-B),
33 KΩ pull-up (148P306-C).
Nominal logic high input voltage
3.3 V to 5 V
3.3 V to 5 V
Minimum logic high input voltage
3.5 V
2.5 V
Maximum logic high input voltage
12 V
12 V
Nominal logic low input voltage
0 V
0 V
Maximum logic low input voltage
1.5 V
0.5 V
Minimum logic low input voltage
-12 V
-12 V
Over voltage protection
±12 V
±12 V
Table 22: LIU Encoder Input Specifications
Non-exciter-based build
Exciter-based build
Output transistor type
Open collector MOSFET
Open collector Darlington
Maximum sink current
500 mA
50 mA
11
For Hot Standby build +48 V nominal (Note: identical to DC input voltage)