I/O Settings - Logic Data Systems L-5500 Manual

5.11.

I/O Settings

The L-5500 supports the following I/Os:
 L-5500 Input Status: Ignition sense, main voltage, and modem temperature
 Two general purpose external analog input lines (AIN1, AIN2)
 Two general purpose external digital input lines (DIN1, DIN2)
 Two general purpose external digital outputs (relay-driven contact closures).
Implemented as two sets of SPST contacts (normally open) (NO1a ... NO2b)
See Figure 35 for pin output diagram.
Figure 35 - L-5500 Pin-output. View looking into device.
Digital inputs are internally biased high. To trigger a digital input, connect the pin to ground.
When digital outputs are triggered, the a and b pins are connected via an internal relay. The
internal relays are rated for 1A @ 30V, or .3A @ 125VAC.
Pin #
Pin 1 Digital Output 1a (NO1a)
Pin 2 Digital Output 1b (NO1b)
Pin 3 Digital Output 2a (NO2a)
Pin 4 Digital Output 2b (NO2b)
Pin 5 Digital Input 1 (DIN1)
Pin 6 Digital Input 2 (DIN2)
Pin 7 Analog Ground
Description
Normally open terminal a of Relay #1
Normally open terminal b of Relay #1
Normally open terminal a of Relay #2
Normally open terminal b of Relay #2
Active when connected to ground.
Active when connected to ground.
Connect to negative or ground side of analog
sensor.
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Notes