Campbell AM16/32B, Features

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© 2020 Campbell Scientific, Inc. | 10/16/2020
Electrical Surge Protection
The equipment is protected from electrical surges using gas
tubes on all inputs. A 35 V varistor is connected between the
shield ground and ground lug to provide surge protection. The
Reset, Clock, and +12 V terminals are protected by 18 V TVS
diodes.
Specifications
-NOTE- The protection on the reset, clock,
and +12 V inputs are provided by
18 V TVS diodes.
Power Unregulated 9.6 to 16 Vdc
Scan Advance Occurs on the leading edge of the
clock pulse transition (from below
1.5 V to above 3.3 V)
Minimum Clock Pulse
Width 1 ms
Maximum Actuation Time
for Relay 20 ms
Relay Operation Break before make
Initial Relay Resistance,
Closed 0.1 ohm
Maximum Switching
Current 500 mA
(Switching currents greater than
30 mA [occasional 50 mA current
is acceptable] will degrade the
contact surfaces of the mechanical
relays and increase their
resistance.This will adversely affect
the suitability of these relays to
multiplex low voltage
signals.Although a relay used in
this manner no longer qualifies for
low voltage measurement, it
continues to be useful for
switching currents in excess of 30
mA.)
Maximum Switching
Voltage 50 Vdc
A voltage divider such as the
VDIV10:1 may be needed between
the AM16/32B and the data logger
to stay within the input limits of
the data logger channel.
Minimum Contact Life
5 x 10
7
operations
Maximum Contact Voltage
Rating 70 V
Maximum Voltage 8 Vdc (clock level)
CE Compliance EN 55022:1998 Class B
EN 61326:1998
Surge Complies with IEC61000-4-5, test
level 3 (±2 kV, 2 ohm coupling
impedance)
Operating Temperature
Range -55° to +85°C (extended)
-25° to +50°C (standard)
Dimensions 23.9 x 10.2 x 4.6 cm (9.4 x 4.0 x 1.8
in.)
Weight ~680 g (~1.5 lb)
ESD
Air Discharge Complies with IEC61000-4-2, test
level 4 (±15 kV).
Contact Discharge Complies with IEC61000-4-2, test
level 4 (±8 kV).
Typical Current Drain
Quiescent < 210 µA
Active 11 mA (typical in 4x16 mode)
6 mA (typical in 2x32 mode)
Reset Levels
Inactive < 0.9 V
Active 3.3 to 8 V