ARMA-K100-CRM
33
4.4 DISCRETE INTERFACE
The discrete interface provides all the necessary functions to monitor and control the amplifier.
The unit provides open collectors for continuous monitoring alarms, faults, and amplifier status,
amplifier enable/disable switching.
Figure 10
provides the detailed circuit information required
for utilizing the above features. Pins 12, 13, 16, 17, 18 & 19 are active for redundant option only.
4.4.1 RF E
NABLE
Providing a contact between pins 8 & 15 of the Discrete Interface connector permits amplifier
operation. When these pins are not in contact, the amplifier is considered to be in hardware
shutdown mode and cannot be started by any means.
Figure 10
: Discrete Interface – Proposed Monitor and Control Circuit
15
8
9
12
10
11
13
7
19
18
17
6
5
4
3
2
FROM J3
DISIN_C
TO J3-12
OF 2-nd SSPA
TO J3-15
OF 2-nd SSPA
16
PWRON_S
RFMUT_S
ALARM_S
FAULT_S
RFOUT_S
REMOT_S
SWTU1_S
SWTU2_S
SWTUS_R
STDBY_S
DISOU_C
SWTWG_A
GAIDW_A
GAIUP_A
AUTOS_A
CIFRC_A
RFENA_C
GND
INTERFACE ON
GRN
YEL
GRN
YEL
RED
+12V
GRN
GRN
YEL
1
GRN
ALL RESISTORS
ARE 4.7 k