29
IQH3B/IQH3BQ
User Manual
PSU Status
Remote
9-Way D-Type Connections
* Pins are physically connected in hardware, but are not functional in this mode.
PSU status can be monitored by means of
output switches connected to two Molex
connectors.
The pin no. connections are as follows:
• 1 (NO) = Normally Open when the
corresponding PSU is plugged in and
switched on.
• 2 (COM) = Common voltage for the
corresponding PSU header – not
connected to the frame GND.
• 3 (NC) = Normally Closed when the
corresponding PSU is plugged in and
switched on.
Molex Header part number: 22-27-2031.
Note:
The NC and NO pins are open circuit when the associated PSU bay
is empty.
The 9-way, D-type connector on the rear
panel allows the unit to be connected to the
RollCall 485 network communications
system.
This connector may also be used as a RS-422
or as a RS-232 RollCall communication port.
Note:
RS-485 interconnections should be pin-to-pin and only be used
for Grass Valley RollNet applications.
Pin No.
Function RS-485
Function RS-422
Function RS-232
1
GND
GND
NC
2
Data A (+)
TX+
TX
3
NC*
RX+
RX
4
GND
GND
NC
5
GND
GND
GND
6
GND
GND
NC
7
Data B (-)
TX-
Short to pin 8
8
NC*
RX-
Short to pin 7
9
NC
NC
NC
1 (NO)
2 (COM)
3 (NC)
1 (NO)
2 (COM)
3 (NC)
PSU 2
PSU 1
5
9
1
6
Summary of Contents for grass valley IQH3B Series
Page 1: ...User Manual Issue 3 Revision 1 2019 07 12 IQH3B IQH3BQ IQ 3U MODULAR ENCLOSURE ...
Page 14: ...xiv Notices ...
Page 18: ...xviii Table of Contents ...
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