Advantech ARMA-C125-CRM User manual

INSTALLATION AND OPERATING MANUAL
125W C-BAND RACK-MOUNT
SOLID STATE POWER AMPLIFIER
ARMA-C125-CRM
PM 100-316450-140 REV. 1

ARMA-C125-CRM
1
WARRANTY
This ADVANTECH Advanced Microwave Technologies, Inc. product is warranted against
defects in material and workmanship for a period of 2 years from date of shipment. During the
warranty period, ADVANTECH Advanced Microwave Technologies, Inc. will, at its option,
either repair or replace products that will prove to be defective.
To return a product for warranty or repair service, you must first request a Return Material
Authorization (RMA) number by contacting ADVANTECH at:
Phone: [phone] or Fax: [phone]
Website: www.advantech.ca or e-mail: [email protected]
The unit should be shipped to the following address, in original shipping container (box), with
shipping charges prepaid.
ADVANTECH Advanced Microwave Technologies, Inc.
657 Orly Avenue
Dorval, Quebec
H9P 1G1
CANADA
Please indicate the RMA number on all shipping documentation.
Units shipped without prior issued RMA, or shipped not in original packing, may be subject of
rejection and returned at sender’s own expense.
LIMITATIONS OF WARRANTY
ADVANTECH Advanced Microwave Technologies, Inc. warrants this product to be free of
materials and workmanship defects.
The foregoing warranty shall not apply to defects resulting from improper handling or abuse by
the Buyer, unauthorized modification, operation outside of the environmental specifications for
the product, or improper installation or maintenance.
ADVANTECH Advanced Microwave Technologies, Inc. shall not be liable for any direct,
indirect, special, incidental or consequential damages.

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CONTENTS
1. PACKING LIST........................................................................................................................................................6
2. SAFETY......................................................................................................................................................................7
3. GENERAL INFORMATION...............................................................................................................................10
3.1 INTRODUCTION.....................................................................................................................................................10
3.2 SPECIFICATIONS...................................................................................................................................................12
4. MAJOR SUBSYSTEMS AND THEIR FUNCTIONS.....................................................................................14
4.1 DESCRIPTION........................................................................................................................................................14
4.1.1 Power Supply.............................................................................................................................................14
4.1.2 HPA Assembly...........................................................................................................................................14
4.1.3 Monitor and Control Assembly................................................................................................................14
4.1.4 Waveguide Arm Assembly ........................................................................................................................14
5. UNPACKING AND INSTALLATION...............................................................................................................21
5.1 INSTALLATION CONSIDERATIONS........................................................................................................................21
5.2 INSTALLATION PROCEDURE.................................................................................................................................21
6. OPERATION..........................................................................................................................................................22
6.1 INTRODUCTION.....................................................................................................................................................22
6.2 FRONT PANEL CONTROLS....................................................................................................................................22
6.2.1 Front Panel Menu System.........................................................................................................................23
6.3 REMOTE INTERFACE.............................................................................................................................................24
6.3.1 Remote Set-up and Wiring Instructions...................................................................................................24
6.3.2 Using the RS-485 Serial Interface ........................................................................................................... 24
INITIAL MENU (SCREEN) PAGE..........................................................................................................................25
MENU (SCREEN) PAGE #1 ...................................................................................................................................26
MENU (SCREEN) PAGE #2 ...................................................................................................................................28
MENU (SCREEN) PAGE #3 ...................................................................................................................................29
6.4 DISCRETE INTERFACE..........................................................................................................................................30
6.4.1 RF Enable..................................................................................................................................................30
7. CONFIGURATION AND SET-UP.....................................................................................................................31
7.1 SOFTWARE CONFIGURATION ..............................................................................................................................31
7.2 RF CONFIGURATION ............................................................................................................................................31
7.2.1 Safety Considerations...............................................................................................................................31
7.3 START-UP.............................................................................................................................................................32
7.4 SELECT LOCAL CONTROL MODE.........................................................................................................................32
7.5 SETTING ALARM CONDITION FOR LOW OUTPUT POWER...................................................................................33
7.5.1 At the Front Panel:...................................................................................................................................33
7.5.2 Using the Serial Interface: .......................................................................................................................33
7.6 GAIN ADJUSTMENT..............................................................................................................................................34
7.6.1 From the Front Panel:..............................................................................................................................34
7.6.2 Using the Serial Interface:.......................................................................................................................34
7.7 POWERING UP THE AMPLIFIER............................................................................................................................34
7.7.1 From the Front Panel:..............................................................................................................................34
7.7.2 Using the Serial Interface: .......................................................................................................................35
7.8 STATUS DISPLAY SCREENS..................................................................................................................................36
7.9 AMPLIFIER SHUTDOWN........................................................................................................................................36

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7.10 RF INPUT AND OUTPUT MONITOR PORTS......................................................................................................36
7.10.1 Monitor Calibration Charts .....................................................................................................................37
8. ALARMS AND FAULTS......................................................................................................................................38
8.1 THERMAL ALARMS AND FAULTS.........................................................................................................................38
8.2 RESETTING THE SSPA..........................................................................................................................................38
8.2.1 Using the Serial Interface.........................................................................................................................39
8.2.2 From the Front Panel...............................................................................................................................39
9. MAINTENANCE AND FAULT FINDING.......................................................................................................40
9.1 CLEANING.............................................................................................................................................................40
9.2 PRECAUTIONS.......................................................................................................................................................40
9.2.1 Connection to Line Voltage......................................................................................................................40
9.2.2 RF Radiation Hazard................................................................................................................................40
9.2.3 Non-User-Serviceable Modules...............................................................................................................40
9.3 FUSES AND CIRCUIT BREAKERS ..........................................................................................................................40
9.3.1 Fuses..........................................................................................................................................................40
9.3.2 Circuit Breakers........................................................................................................................................40
9.4 MAIN FAULT DIAGNOSIS .....................................................................................................................................41
9.5 POWER SYSTEM FAULT DIAGNOSIS ....................................................................................................................42
9.6 SSPA FAULT DIAGNOSIS.....................................................................................................................................42
9.7 TEMPERATURE FAULT DIAGNOSIS......................................................................................................................43
9.8 LOW OUTPUT POWER FAULT DIAGNOSIS ...........................................................................................................43
9.9 HIGH REFLECTED POWER FAULT DIAGNOSIS.....................................................................................................43
9.10 REPLACEMENT OF FANS (EACH UNIT)............................................................................................................43
9.11 MODULE REPLACEMENT.................................................................................................................................44

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FIGURES
FIGURE 1: PRODUCT OUTLINE ...................................................................................................... 11
FIGURE 2: BLOCK DIAGRAM......................................................................................................... 15
FIGURE 3: BACK PANEL CONNECTORS ......................................................................................... 16
FIGURE 4: INITIAL PAGE OF THE COMMUNICATION PROGRAM...................................................... 25
FIGURE 5: PAGE #1 OF THE COMMUNICATION PROGRAM ............................................................. 26
FIGURE 6: PAGE #2 OF THE COMMUNICATION PROGRAM ............................................................. 28
FIGURE 7: PAGE #3 OF THE COMMUNICATION PROGRAM ............................................................. 29
FIGURE 8: DISCRETE INTERFACE - PROPOSED MONITOR AND CONTROL CIRCUIT......................... 30

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TABLES
TABLE 1: ELECTRICAL SPECIFICATIONS........................................................................... 12
TABLE 2: MECHANICAL SPECIFICATIONS......................................................................... 13
TABLE 3: POWER REQUIEMENTS......................................................................................... 13
TABLE 4: ENVIRONMENTAL CONDITIONS........................................................................ 13
TABLE 5: CONNECTORS ......................................................................................................... 16
TABLE 6: RS-485 INTERFACE................................................................................................. 17
TABLE 7: SERIAL RS-485 INTERFACE (J2) – PIN ASSIGNMENTS................................... 17
TABLE 8: FRONT PANEL DISPLAY AND CONTROLS ....................................................... 17
TABLE 9: DISCRETE INTERFACE (J3) – PIN ASSIGNMENTS ........................................... 18
TABLE 10: STATUS INDICATORS.......................................................................................... 20
TABLE 11: REDUNDANCY INDICATORS (ONLY FOR REDUNDANT SYSTEMS)..................... 20
TABLE 12: SERIAL RS-485 INTERFACE CONNECTION INFORMATION........................ 24

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1. PACKING LIST
Item Quantity Description Part #
1. 1Installation & Operating Manual PM 100-316450-140, Rev. 1
2. 1125 Watt C-Band, SSPA
ARMA-C125-CRM 100-316450-140
3. 1Serial Communications Software
(on 3½” diskette) 380-100796-001 REV. 1.0
4. 1Converter RS-485 TO RS-232
PC Keyboard Powered 510-000485-001
5. 1Connector D-Sub 25 Backshell with Thumb
Screws 631-000250-001
6. 1Connector D-Sub 25 Sold Cup Plug 631-871380-001
7. 1Connector 15 Crimp Snap-in Contacts Plug 631-205206-001
8. 1Connector D-Sub 9 Backshell 631-925380-001
9. 1Connector D-Sub 9 Sold Cup Plug 631-871380-003
10. 1Waterproof gasket for CPR – 137 G W/G
flange 705-137000-001
11. 810-32x1/2” Mach Screw Phil Pan Head
18-8 Standard Sheets (SS) 802-103210-001
12. 10 #10-32 x 1/2” hex screw 802-103290-001
13. 10 #10 split lock washers 803-100100-001
14. 1Slide Non-pivoting with Mounting Kit 815-230124-001
15. 1Wrap-around Bracket for all open slot S-230
Slide 815-307200-001

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2. SAFETY
In addition to this section, included by reference are the following pertinent sections of the
International Standard IEC-215, ‘Safety requirements for radio transmitting equipment’:
Appendix D, ‘GUIDANCE ON ASSESSING THE COMPETENCE OF PERSONNEL FOR
DESIGNATION AS SKILLED’ and also Sub-clause 3.1 of the Standard.
Appendix E, ‘GUIDANCE ON SAFETY PRECAUTIONS TO BE OBSERVED BY
PERSONNEL WORKING ON RADIO TRANSMITTING EQUIPMENT’, also Sub-clauses 3.2,
3.7 and 22.1 of the Standard.
To prevent the risk of personal injury or loss related to equipment malfunction Advantech uses
the following symbols for safety related information. For your own safety, please read the
information carefully BEFORE operating the equipment.
Symbols used in manual:
WARNING: This indicates a hazardous procedure that could result in serious injury or death if
not performed properly.
CAUTION: This indicates a hazardous and dangerous procedure that could result in light-
to-severe injury or loss related to equipment malfunction, if proper precautions
are not taken.

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----------------------------------------------- WARNING -----------------------------------------------------
When supplying power to this equipment, use the 3-pin connector provided, to connect to a
grounded power outlet. If power is supplied without grounding to the equipment, there is a risk
of receiving a severe or fatal electric shock.
In the context of this document any voltage that is lethal is viewed as ‘High Voltage’. Therefore,
even prime power (90 to 265V AC) is dangerous because prime power potentials have been
known to cause death or injury.
----------------------------------------------- WARNING ----------------------------------------------------
This equipment can not be repaired by the operator. DO NOT attempt to remove the
equipment cover or to disassemble internal components. Only qualified service technicians
should service this equipment. There are high-voltage parts in this equipment presenting a risk of
severe injury to untrained personnel. In addition, there is a risk of damage to precision
components.
----------------------------------------------- WARNING ----------------------------------------------------
ALWAYS TERMINATE THE OUTPUT WAVEGUIDE OF THE AMPLIFIER WITH AN
RF LOAD CAPABLE OF DISSIPATING FULL CW RF POWER. SIMILARLY
TERMINATE THE INPUT TO AVOID THE POSSIBILITY OF THE AMPLIFIER
BEING DRIVEN BY STRAY LEAKAGE SIGNALS. Incorporate the termination prior to
applying prime power to the amplifier. This procedure prevents self-oscillation and irradiation of
the local environment. Even if a source is not connected to the amplifier you are working with,
there are situations where the amplifier can go into a self-induced mode and generate high levels
of RF energy. Destruction caused under excessive load voltage standing wave ratio (VSWR) will
void the warranty. Although the equipment has internal protection for VSWR higher than 3:1
and will automatically go in shutdown (with a delay of 1 second), still it is a safe procedure to
avoid unwanted effects.

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----------------------------------------------- WARNING ----------------------------------------------------
DO NOT LOOK INTO THE OUTPUT PORT OF THE POWERED RF AMPLIFIER.
Treat the powered amplifier with extreme care. Keep in mind that levels of microwave radiation
that do not induce immediate physical discomfort in most individuals can be sufficiently high to
induce longer term effects. Your eyes are particularly vulnerable parts of your body.
The permissible levels of exposure are quite low compared to the power levels of the amplifiers
built by Advantech (e.g. less than 10 mW versus 20 to 500 W delivered by various units). The
permissible levels are currently being studied by a number of organizations. In the past the U.S.
safety Code established a dosage rate of 10 mW/cm2. Currently there is consideration being
given to reducing the permissible level to 1 mW/cm2in the United States, as has been the case
for several European countries.

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3. GENERAL INFORMATION
3.1 INTRODUCTION
This manual contains information that describes installation, operation, and maintenance
procedures for the 125W C-Band rack-mount (indoors) Solid State Power Amplifier model
ARMA-C125-CRM. Because specialized training is required for some phases of installation and
operation, certain parts of this manual are directed only to trained personnel. Warnings appear at
the appropriate points to caution all users of potential RF and high-voltage hazards.
For a safe and versatile operation, please read the information carefully BEFORE using the
equipment.
ADVANTECH Advanced Microwave Technologies, Inc. has prepared this manual for use as a
guide for the proper installation, operation and maintenance of ADVANTECH equipment and
computer programs. The drawings, specifications and information contained herein are property
of ADVANTECH Advanced Microwave Technologies, Inc. Any unauthorized use or disclosure of
these drawings, specifications and information is prohibited; they shall not be reproduced,
copied or used in whole or in part as the basis for manufacturing or sale of the equipment or
software programs without the prior written consent of ADVANTECH Advanced Microwave
Technologies, Inc.

ARMA-C125-CRM
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Figure 1: Product Outline

ARMA-C125-CRM
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3.2 SPECIFICATIONS
The SSPA specified herein is capable of meeting or exceeding the performance specifications
listed in the following table over frequency range, operating temperature and line voltage variation,
unless otherwise specified. The SSPA will meet all RF performance specifications within thirty
minutes of application of prime power.
TABLE 1: ELECTRICAL SPECIFICATIONS
Frequency Range 5.850 - 6.425 GHz
Power Output (P1 dB) + 50 dBm, min
Gain at rated power 70 dB, min
Gain Flatness 2.0 dB pk-pk, max, over 575 MHz, at room temp.
0.6 dB, max, over 40 MHz
Gain Slope 0.015 dB/MHz, max
Gain Variation ± 0.50 dB, max (0 °C to +25 °C)
± 1.50 dB, max (0 °C to +50 °C)
Gain stability over 24 hours at constant
temperature and drive level ± 0.25 dB, max
Gain Adjustment 18 dB, min
Input Return Loss (Power on) 18 dB, min
Output Return Loss (Power off) 20 dB, min
Noise Figure @ maximum gain 8 dB, max
Spurious at rated power - 65 dBc, max
Harmonics at rated power - 90 dBc, max
AM/PM Conversion at rated power 2.5 °/dB, max
Third Order Intermodulation
(two equal tones 5 MHz apart) - 36 dBc, max @ 7 dB back-off (total power)
- 26 dBc, max @ 3 dB back-off (total power)
Group Delay: Linear
Parabolic
Ripple
0.02 nsec/MHz, max.
0.003 nsec/MHz2, max
1 nsec p-p, typical
Residual AM
(F* = Frequency in kHz)
- 45 dBc
- 20 ( 1+ log F* ) dBc
- 80 dBc
(0 - 10 kHz)
(10 kHz - 500 kHz )
(500 kHz - 1 MHz )
Phase Noise Meets IESS-308/309

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TABLE 2: MECHANICAL SPECIFICATIONS
Physical Dimensions See Figure 1: Product Outline at page 11
Approximate Weight 60 lbs (27 kg)
Mounting Requirements See Figure 1: Product Outline at page 11
TABLE 3: POWER REQUIEMENTS
Power Requirements 90-132 or 180-265 VAC (autoranging), 47- 63 Hz
Power Consumption 8 A maximum @ 110 VAC
TABLE 4: ENVIRONMENTAL CONDITIONS
Temperature:
Non operating (continuos exposure)
Operating (ambient)
- 40° C to + 85° C
0° C to + 50° C
Relative humidity 95 %, Non-condensing
Altitude 10,000’ AMSL, derated 2 °C/1,000’ from AMSL

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4. MAJOR SUBSYSTEMS AND THEIR FUNCTIONS
4.1 DESCRIPTION
The ARMA-C125-CRM is a 125 Watt solid state power amplifier (SSPA). The SSPA
incorporates a DC main power supply and a forced air cooling system. The SSPA features an
RS-485 interface that provides full remote monitor and control of selected functions. A product
outline drawing of the amplifier is shown in Figure 1at page 11and a functional block diagram
is shown in Figure 2at page 15.
4.1.1 POWER SUPPLY
There are three power supplies in each SSPA. The main power supply provides a single output,
DC high current to the HPA (High Power Amplifier) as well as a filtered, low current supply for
the second and the third power supplies. The secondary power supply has multiple outputs for
operation of the Monitor and Control Assembly and the front panel display. The third power
supply delivers a temperature controlled voltage between 11.5 VDC and 60 VDC that allows for
different rotating speeds of the cooling fans. The main Power Supply is configured to work from
90-132 or 180-265 VAC (autoranging), 47-63 Hz, single phase.
4.1.2 HPA ASSEMBLY
The HPA Assembly amplifies the RF input signal to a level sufficient for transmission. Integral
to this module are low noise and power amplifier sections as well as variable attenuation sections
that are used for temperature compensation and gain control. Other functionality includes
internal power conditioning, temperature monitoring & high temperature shutdown.
4.1.3 MONITOR AND CONTROL ASSEMBLY
The MCA (Monitor and Control Assembly) monitors all the important operating parameters of
the system, and communicates externally (via serial and discrete interfaces) as well as with the
front panel controls and display. This module controls the mode of operation of each amplifier
unit (remote or local).
4.1.4 WAVEGUIDE ARM ASSEMBLY
The Waveguide Arm Assembly connects to the output of the HPA, at the back panel of the
amplifier. An output power monitor port, as well as forward and reverse power detectors are
included as part of this assembly.

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Figure 2: Block Diagram
J1
RF
INPUT
J4
OUTPUT
MONITOR
J7
W/G OUTPUT
TEMP
SENSOR
GAIN
CONTROL
COOLING
FANS
+12V,
-9V +12V,
-9V
HPA ASSEMBLY
OUTPUT WAVEGUIDE
ARM ASSEMBLY
POWER CONDITIONER
BOARD ASSEMBLY
J5
AC
LINE
+ 12V- 9V
- 15V + 15V
+ 5V
J2
SERIAL
I/F
J3
DISCRETE
I/F
J6
REDUNDANT
I/F
CURRENT
SENSOR
GND
TEMP
SUMALARM
MUTE
40 dB
30 dB
20 dB
+ 12V
MAIN
POWER
SUPPLY
SECONDARY
POWER SUPPLY
FRONT PANEL
KEY PAD
LEDs
DISPLAY
SPEED
CONTROLLER
CIRCUIT
BREAKER
11.5 - 60 V
- 9V
LNA HPA
TEMP.
COMPENS.
ISOLATOR FILTER
MONITOR
AND
CONTROL
REFLECTED
POWER
DETECTOR
OUTPUT
POWER
DETECTOR
THERM
12 V
J8
INPUT
MONITOR
A B C
GAIN
CONTROL

ARMA-C125-CRM
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Figure 3: Back Panel Connectors
TABLE 5: CONNECTORS
Connector Function Description Mating Connector
(J1) RF Input N - Type (F) N - Type (M)
(J2) Serial interface DE - 9S (F) DE - 9P (M)
(J3) Discrete Interface DB - 25S (F) DB - 25P (M)
(J4) Output Sample Port N - Type (F) N - Type (M)
(J5) AC line IEC - 320 (M) IEC - 320 (F)
(J6)* Redundant Interface Not available Not applicable
(J7) RF Output CPR -137 (Grooved) CPR -137 (Flat)
(J8) RF Input Monitor Port N - Type (F) N - Type (M)
* The redundant interface is operational only for redundant systems

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TABLE 6: RS-485 INTERFACE
Baud rate 9600 (default factory setting)
Data Bits 7
Stop Bit 1
Parity EVEN
TABLE 7: SERIAL RS-485 INTERFACE (J2) – PIN ASSIGNMENTS
Name Type Pin # Active condition
TX485_H Serial port (output) 6Serial transmit port, RS-485 TX+ levels
TX485_L Serial port (output return) 4Serial transmit port, RS-485 TX- levels
RX485_H Serial port (input) 9Serial receive port, RS-485 RX+ levels
RX485_L Serial port (input return) 3Serial receive port, RS-485 RX- levels
RS485_C Serial port (common) 5System common
1Shield ground / safety ground
TABLE 8: FRONT PANEL DISPLAY AND CONTROLS
Display Keypad
20 characters x 2 rows alphanumeric 6 keys: [éé],[êê], [çç],[èè],[Enter] &[Clear]

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TABLE 9: DISCRETE INTERFACE (J3) – PIN ASSIGNMENTS
Name Type Pin # Active condition
PWRON_S output (active closed) 1Indicates controller power is on.
RFMUT_S output (active closed) 2Indicates RF output is muted (i.e. off).
ALARM_S output (active open) 3Indicates operation at base plate temperature > 70°C but
< 80°C, or with degraded performance; caused by
internally detected alarms.
FAULT_S output (active open) 4Indicates major failure; operation is not possible.
Amplifier drain voltages are automatically turned off.
Caused by: base plate temperature > 80°C, drain voltage
> 13V or < 9V, drain current > maximum rated + 20%,
load VSWR > 3.0:1, or internally detected faults.
RFOUT_S output (active closed) 5Indicates RF output power greater than factory set
threshold. Refer to Section 7.5 at page 33.
REMOT_S output (active closed) 6Indicates that the system control is via the remote
computer I/F (CIF).
DISOU_C output (common) 7System common.
RFENA_A input (active closed) 8Enables amplifier.
CIFRC_A input (active open) 9Enables remote computer I/F (CIF).
GAIUP_A input (momentary closed) 10 To decrease attenuator setting. Step size: 0.1 dB.
GAIDW_A input (momentary closed) 11 To increase attenuator setting. Step size: 0.1 dB.
AUTOS_A input (active open) 12* Enables automatic switch over to standby unit, upon
fault detection.
Alternate position is manual mode, for servicing.
SWTWG_A input (momentary closed) 13* Waveguide switch toggle action to connect either unit
A
or unit B to antenna port.
GND ground 14 Ground
DISIN_C input (common) 15 System common.
SWTU1_S output (active closed) 16* Normally closed, form-C contact of the waveguide
switch, when unit A is connected to the antenna port.
SWTU2_S output (active open) 17* Normally open, form-C contact of the waveguide switch,
when unit A is connected to the antenna port.
SWTUS_R output (return) 18* Form-C contact common.
STDBY_S output (active closed) 19* Handshake signal indicating that the unit is in a stand-by
state. This implies that there are no faults or alarms and
that the unit is in auto mode.

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Notes:
1. All outputs (except on pins 16, 17 and 18) are open-collector NPN transistors that either are
turned on (active closed) or are turned-off (active open). These NPN transistors have the
following characteristics:
Vce max. = 24 VDC
Vce, sat = 0.8 VDC @ Ic= 50 mA
Iceo = 100 µA @ Vce = 12V DC
Maximum sinking current = 50 mA
2. All inputs are one terminal of a voltage comparator with internal protection resistor and
diodes. These inputs are pulled up to the internal +12V DC and have these characteristics:
Maximum input voltage < 24 VDC
Open state, input resistance > 50 kΩ
Close state, input source impedance < 1kΩ
Close state, required sink current < 1 mA
The input is active in a close state, when it is connected to circuit common J3-15 through an
open transistor or a contact closure of a relay.
For momentarily closed input, the input pulse width must be more than 10 ms minimum.
The longer pulse width will allow the attenuation to change by more than 0.1 dB.
3. Remote operation: Once the remote control mode is selected from the front panel of a rack-
mount amplifier, two remote control interfaces are available for operation: the discrete
interface J3 and the serial interface J2. At anytime during the operation only one remote
control interface is active (i.e. ready to accept input command) and the control of redundant
switch is ignored if the optional redundant software is not installed.
The selection of remote control interface is via the discrete input J3-9. The active-open input
at J3-9 will enable the commands from the serial interface to be acknowledged and carried
out and the active-closed input (i.e. grounding) will enable the discrete remote interface. The
monitoring outputs are always active (valid) at either remote interface.
4. * = Pins 12, 13, 16, 17, 18 and 19 are active for Redundant option only.