Campbell Scientific AM25T 25-Channel Solid State Multiplexer - Manual (Page 6)

AM25T Solid State Multiplexer
OPERATING TEMPERATURE
Standard: -40 °C to +85°C
RTD accuracy ±0.4°C
OPERATING HUMIDITY
Noncondensing: 0 to 95%
DIMENSIONS
Length: 23.6 cm (9.3”)
Width: 5.10 cm (2.0")
Depth: 13.2 cm (5.2”)
WEIGHT
0.91 kg (2.0 lbs)
3.6 kg (8.0 lbs); Shipping
EXPANDABILITY (nominal)**
2 AM25Ts per CR800 or CR850
4 AM25Ts per CR1000
6 AM25Ts per CR23X
4 AM25Ts per CR10(X)
6 AM25Ts per 21X
7 AM25Ts per CR7 725 Card
MAXIMUM CABLE LENGTH
Multiplexers can be located up to 305 m (1000 ft) from the datalogger. When
lightning protection is required, do not exceed 152 m (500 ft) in cable length. The
spark gaps will not fire if the heavy ground wire is longer than 152 m (500 ft).
TYPICAL RELAY RESISTANCE
500 Ω
MAXIMUM SWITCHING CURRENT
25 mA; Switching currents greater than 25 mA will damage the relays and render
them unusable.
**Assumes sequential activation of multiplexers and that each datalogger channel
is uniquely dedicated. If your application requires additional multiplexing
capability, please consult CSI for application assistance.
1.2 Physical Description
The AM25T is housed in an anodized aluminum case with a cover that will
help reduce temperature gradients across the AM25T's terminal strips
(Figure 1).
2