Description
The Allen-Bradley 1756-IM16I is an AC digital input module. It has 16 individually isolated inputs,
per point isolation, and you can configure a change of state and the input filter times. Compatible
with the 1756 ControlLogix chassis, it requires either the 1756-TBS6H or 1756-TBCH 36-pin
removable terminal block housing (RTB) to connect it to the chassis. The 1756-IM16I’s operating
voltage range is from 159 to 265 Volts AC, maximum inrush current is 250 milliamps, and the voltage
category is 240 Volts AC 50/60 Hertz.
It has a backplane current of 100 milliamps at 5 Volts and 3 milliamps at 24 Volts, with a total
backplane power of 0.58 Watts. The module has a maximum power dissipation of 5.8 Watts at
60 Degrees Celsius and a thermal dissipation of 19.78 BTU/hour. The 1756-IM16I has a screw to backplane
input delay time when going from an off to on state, and vice versa. From ‘off’ to ‘on’, the input delay time is
the hardware delay of 10 milliseconds max plus the input filter time (user-selectable at 1 or 2 milliseconds),
while from ‘on’ to ‘off’, it is the hardware delay time of 8 milliseconds max plus the input filter time (user-selectable at 9 or 18 milliseconds).
The maximum current of the module during an off-state is 2.5 milliamps and 40 Volts
AC is its maximum voltage at that state. During an on-state, the current ranges from 5 milliamps at 159
Volts AC, 60Hertz to 13 milliamps at 265 Volts AC, 60 Hertz. On the other hand, the on-state voltage
range varies and they are: 159-265 Volts AC, 47-63 Hertz at 30 Degrees Celsius with all channels ON,
159-265 Volts AC, 47-63 Hertz at 40 Degrees Celsius with 8 points ON, 159 to 253 Volts AC, 47-63 Hertz
at 45 Degrees Celsius with all channels on, and 159 to 242 Volts AC, 47-63 Hertz at 60 Degrees Celsius with all channels ON.
The 1756-OW16I has a maximum switching frequency of One (1) operation every Three (3) seconds
or (0.3 Hz at rated load) with mean bounce time of 1.2 ms. Each of the output contacts are expected
to operate up to 300 kHz when used with resistive loads and 100 kHz when used with inductive loads.
Additionally, this module supports scheduled outputs and may be configured to Hold last state, On or
Off during when FAULTED with Off as default setting. Similarly, output states may also be held at last state,
with OFF as default setting during PROGRAM mode. This module is shipped with a Removable Terminal Block (RTB).
Applicable RTB for use with this module are 1756-TBCH and 1756-TBS6H.
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