AXIS Q1941-E PT Mount Thermal Network Camera
Technical specifications
Power connector
2-pin terminal block for DC power input. Use a Safety Extra Low Voltage (SELV) compliant
limited power source (LPS) with either a rated output power limited to
≤
100 W or a rated output
current limited to
≤
5 A.
RS485/RS422 connector
Two 2-pin terminal blocks for RS485/RS422 serial interface used to control auxiliary equipment such as pan-tilt devices.
The serial port can be configured to support:
• Two-wire RS485 half duplex
• Four-wire RS485 full duplex
• Two-wire RS422 simplex
• Four-wire RS422 full duplex point to point communication
Function
Pin
Notes
RS485B alt RS485/422 RX(B)
1
RS485A alt RS485/422 RX(A)
2
RX pair for all modes (combined RX/TX for 2-wire RS485)
RS485/RS422 TX(B)
3
RS485/RS422 TX(A)
4
TX pair for RS422 and 4-wire RS485
Important
The recommended maximum cable length is 30 m (98.4 ft).
Performance Considerations
When setting up your system, it is important to consider how various settings and situations will affect performance. Some factors
affect the amount of bandwidth (the bit rate) required, others can affect the frame rate, and some affect both. If the load on the
CPU reaches its maximum, this will also affect the frame rate.
The following factors are among the most important to consider:
•
High image resolution and/or lower compression levels result in images containing more data. Bandwidth affected.
•
Access by large numbers of Motion JPEG and/or unicast H.264 clients. Bandwidth affected.
•
Simultaneous viewing of different streams (resolution, compression) by different clients. Effect on frame rate and
bandwidth.
•
Accessing Motion JPEG and H.264 video streams simultaneously. Frame rate and bandwidth affected.
•
Heavy usage of event settings affect the product’s CPU load. Frame rate affected.
•
Using HTTPS may reduce frame rate, in particular if streaming Motion JPEG.
•
Heavy network utilization due to poor infrastructure. Bandwidth affected.
•
Viewing on poorly performing client computers lowers perceived performance. Frame rate affected.
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