Connectors on theELMB Motherboard ver 3

24.1 2002 Updated  for the  ELMB3 (3.3V). The 5V ELMBs prototype series is being replaced!  
 
     Top View of 
the ADC Input
Connectors
J3, J4,J10,J11

Motherboard of ELMB HW rev 1.2
Pin Assignment of the Connectors J3,J4,J10,J11
Updated 26.05 2000 for ELMB motherboard
 Signal Name 
PIN
PIN
       Signal Name 
VREF (2.5V)
34
33
AGND
Negative Input Channel 16
32
31
Positive Input Channel 16
Negative Input Channel 15
30
29
Positive Input Channel 15
Negative Input Channel 14
28
27
Positive Input Channel 14
Negative Input Channel 13
26
25
Positive Input Channel 13
Negative Input Channel 12
24
23
Positive Input Channel 12
Negative Input Channel 11
22
21
Positive Input Channel 11
Negative Input Channel 10
20
19
Positive Input Channel 10
Negative Input Channel   9
18
17
Positive Input Channel   9
Negative Input Channel   8
16
15
Positive Input Channel   8
Negative Input Channel   7
14
13
Positive Input Channel   7
Negative Input Channel   6
12
11
Positive Input Channel   6
Negative Input Channel   5
10
9
Positive Input Channel   5
Negative Input Channel   4
8
7
Positive Input Channel   4
Negative Input Channel   3
6
5
Positive Input Channel   3
Negative Input Channel   2
4
3
Positive Input Channel   2
Negative Input Channel   1
2
1
Positive Input Channel   1

 
 
 
 
 
Top View of the Connector J7
 

Motherboard of ELMB HW rev 1.2
Analog or Digital INPUTS
PORT F
Pin Assignment of the Connector J7

Updated 26.5 2000 for ELMB motherboard
Signal Name
PIN
PIN
 Signal Name
Not connected
20
19
 Not connected
GND
18
17
 GND
GND
16
15
 Bit 7 -PORT F
GND
14
13
 Bit 6 -PORT F
 GND
12
11
 Bit 5 -PORT F
GND
10
9
 Bit 4 -PORT F
GND
8
7
 Bit 3 -PORT F
GND
6
5
 Bit 2 -PORT F
GND
4
3
 Bit 1 -PORT F
GND
2
1
 Bit 0 -PORT F
 

 
 
Top View of the 
Connector J8
 


 
Motherboard of ELMB HW rev 1.2
Digital/SPI interface connector 
Pin Assignment of the Connector J8
Updated 7.8 2001 for ELMB3 motherboard
Updated 23.1 2002 for ELMB 3.3V version
Signal Name
PIN
PIN
 Signal Name
 Not Connected
20
19
 Not Connected
PD4
also used by the ADC on the ELMB
18
17
 Not Connected
PD5
also used by the ADC on the ELMB
16
15
 PE7
PD6
also used by the ADC on the ELMB
14
13
 PE6
PE5
12
11
 PE4
PE3
10
9
 PD7
also used by the ADC on the ELMB
PD3
also used by the ADC on the ELMB
8
7
 DGND
DGND
6
5
 +3.3V Digital (ELMB 3.3V version)
+5VAnalog 
4
3
 -5V Analog
AGND 
2
1
 AGND

 
 
Top View of the Connector J5

 
Motherboard of ELMB HW rev 1.2
Pin Assignment of the Connector J5
Bidirectional I/O
PORT A 
Updated 26.5 2000 for ELMB motherboard
Signal Name
PIN
PIN
 Signal Name
     GND 
10
9
 GND
PORT A -Bit 7
8
7
 Bit 6 -PORT A
   PORT A -Bit 5
6
5
 Bit 4 -PORT A
PORT A -Bit 3
4
3
 Bit 2 -PORT A 
PORT A -Bit 1
2
1
 Bit 0 -PORT A
 
  Top View of the Connector J9


 

 
Motherboard of ELMB HW rev 1.2
Pin Assignment of the Connector J9
Output (only)
PORT C 
Updated 25.5 2000 for ELMB motherboard
Signal Name
PIN
PIN
 Signal Name
GND
10
9
 GND
Bit 7 -PORT C
8
7
 Bit 6 -PORT C
Bit 4- PORT C
6
5
 Bit 4 -PORT C
Bit 2- PORT C
4
3
 Bit 2 -PORT C
Bit 1- PORT C
2
1
 Bit 0 -PORT C
 

CANbus connector

The ELMB motherboard CAN bus connector  is shown below. The CERN ATLAS DCS Local Monitor Box can be powered via the CAN bus connector or  a special Molex connector at the top of the box the pinout of the CANbus D-Sub connector is shown in Figure 1.
 
 
 

CANNON DSub 9 pin 
Top VIEW
pin
CiA
Motherboard LMB
1
Reserved
Not used (was reserved for RESET)
2
CAN_L
CAN_L
3
CAN_GND
CAN_GND
4
Reserved
VDG
5
CAN_SHLD
Not used reserved for CAN_SHLD
6
GND
VCG
7
CAN_H
CAN_H
8
Reserved
VDP (7 to 12V)
9
CAN_V+
VCP (8 to 12V)
 

Pinout for the male 9-pin D-Sub CAN connector.






The National Instruments PCI-CAN/2 jumpers should be in the position for external power.
 
 

Power supply connector B2

The ELMB motherboard ver 3 is equipped with a connector with screw terminals. It is possible to power the three parts of the ELMB with completely isolated ground connections using three separate power supplies. When no isolation is needed it is possible to use the same supply for all the power. However in the case when the CAN PC interface card is powered via the CANbus connector the supply should be between  8 V and 12 V.
 
Care should be taken that the power lines do not have short undervoltages or noise spikes below 5.5V even as short as 1 us. This could  reset the microcontrollers and/or put the ADC in an undefined state. Use shielded power lines in noisy environments!

 
 
 
Power

Screw terminals

PIN
 DESCRIPTION
1
 VXP Auxiliary power supply Input Optional
2
 VDG Digital supply ground
3
 VDP Digital supply Input (typ +10V)
4
 VAG Analog ground
5
 VAP Analog Power Input (typ +10V)
6
 VXG Auxiliary power supply ground Optional
7
 VCG CAN supply ground
8
 VCP CAN power supply (typ +10V)

 
 

The following connectors are used in special applications

Connector J6

This connector is used for the testing of the power supply regulators on the ELMB printed circuit board.
 
TEST
 
 

10 pin header
PIN
DESCRIPTION
1
 P5V digital +3.3 V supply  OUTPUT  (was before 5V therefore the name)
2
 VDG digital supply ground 
3
 VXO +5.4V supply (from 3.3V charge pump)  OUTPUT
4
 VXG charge pump ground
5
 P5VEXT CAN transceiver +5V supply OUTPUT
6
 VCG CAN transceiver ground
7
 P5VA Analog +5V supply  OUTPUT
8
 VAG Analog supply ground
9
 M5VA Analog -5V supply  OUTPUT
10
 VAG Analog supply ground 

Typical test voltages

Voltage between P5V and VDG (pin 1 to pin 2) =3V (3.2V to 3.4V)

Voltage between P5VEXT and VCG (pin 4 to pin 6) =5V (4.75V to 5.25V)

Voltage between P5VA and VAG (pin 7 to pin 8) =5V (4.75V to 5.25V)

Voltage between MP5A and VAG (pin 9 to pin 10) =-5V (-4.75V to -5.25V)


Connector J29

This connector is used for jumpers. Jumpers connect IC40 shutdown and digital ground, IC40 output and digital power, analog and digital GND, analog and digital power.
 
J29
 
 


10 pin header
PIN
DESCRIPTION
1
 VXS IC40 shutdown
2
 VDG Digital ground
3
 VDP Digital power
4
 VXO +5.4V supply (from IC40)
5
 VDG Analog ground
6
 VDG Digital ground
7
 VAP Analog power
8
 VDP Digital power

Normally all connection should be open


Connector J30 (not to be used)

Jumper for connection of reset line to CAN reset line.
 
J30

2 pin header
PIN
DESCRIPTION
1
 RESET signal from CAN connector pin 1
2
 MRD signal to Atmel processors

Normally all connection should be open