Page Contents

Description

The OP8123 MSCC module converts four standard ±16 V_peak input voltages into current sources, up to 1 A and under 16 V_peak (voltage compliance).

The OP8123 contains both current and thermal protections. An indicator is present to indicate whether the output is in fault. It can be used in standalone with minimal connection or in an OP8120 chassis for a total of 32 current sources per chassis.

When used in an OP8120 chassis, each channel is configured to match the OPAL-RT’s DB37 standard pinout. The OP8123 module draws its power from the OP8120 chassis.

Features

• LED fault indicators

• Current and thermal protection

• Individual channel activation/deactivation

• Outputs can be connected in parallel for higher drive current

• Front screw terminal connectors

• Easy installation (in chassis)

Applications

• Current sensor simulation

• Current source

OP8123 Interface

Channel Identification

The OP8123 has 4 screw terminal connectors identified as channels A, B, C and D and 4 toggle switches to activate or deactivate each channel.

Status LED Table

Each channel has two LEDs, one red and one green. The following table explains what the channel status is, according to the LED states.

Green LED	Red LED	Status

Green LED	Red LED	Status
On	Off	Activated	Open LED
Off	On	Deactivated
On	On	Fault

Power LED Description

Each module has 2 power green LEDs:

• When the left LED is on, it indicates that the 12 Vdc fan is operating.

• When the right LED is on, it indicates that the ±5 Vdc power is functioning properly.

Activate/Deactivate Toggle Switches*

Each channel has an activate/deactivate toggle switch. The channel can be activated or deactivated at any moment even if an input signal is present.

* An earlier version of this module had push buttons.