ADC HRM-238 L1 Manuel D’Utilisation

 shows the location for each connector on the HRM-238 shelf backplane. 

 lists the shelf connector 

types and management functions available to the HMU-319 management units through those connectors. 

HRM-238 Shelf Backplane Connectors (back view)

P1, P6

Provides connection from the HRM-238 shelf for the management 
units to each individual card that they manage.

Amphenol 
(CHAMP)

Male

50

P2, P3, P4, P5

Provides 4 connection points (two for each management unit) for a 
terminal, computer, or modem. There is one AUX port and one OS port 
connector for each management unit.

DB-25

Female

25

TB1

Provides separate -48 Vdc connection from the CO battery source 
to each management unit. Also provides battery common ground and 
a frame ground.

Terminal 
block

N/A

 6

J13, J14

Provides connection for alarm relay contacts.

Wire-wrap 
pins

Male

23

J1, J3

Provides a 10BASE-2 connection to a LAN.

BNC

Female

 1

AUX port DB-25

connector (P5)

OS port DB-25
connector (P4)

BNC connector (J1)

Alarm relay pins (J13)

Terminal block (TB1)

Alarm relay pins (J14)

BNC connector (J3)

OS port DB-25
connector (P2)

50-pin Amphenol

connector (P6)

AUX port DB-25
connector (P3)

B-side connectors

A-side connectors

50-pin Amphenol
connector (P1)

H0545-A