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The remote GP IO unit is a 1U chassis which is available in two versions to provide either 24 or 48 channels of GP input
and output. Two mains power supplies are standard thus providing ‘On-Air’ redundancy.
GP IO boxes connect directly to the SSL Network using standard Ethernet cable.
Input and output signals can be configured to be either latching or momentary; settings are individually assigned in software
via the touch screen. Momentary the input trigger signal duration must be greater than 50mS.
Refer to Section 4-13 for the connector pinouts.
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The internal mains power supplies are of the fully isolated type. It will be necessary to attach a separately earthed
lead to the rear of the chassis to ensure a permanent ground connection. An M3 threaded insert is provided on the rear
panel for the ground lead.
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Inputs are triggered by applying a voltage of between 4V and 30V (AC or DC) across each pair of inputs pins. The current
drawn is approximately 10mA.
A 0V reference is available on all input connectors. A protected source of +12V available on all output connectors.
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The switch closures are via DIL relay. Contact rating is 100Vdc, 125Vac, 100mA max.
Do not use the output contacts to directly switch capacitive or reactive loads; always use an external relay with a
suitable contact rating.
If used for discrete track arming with associated tally, the tally must return to the same number input as the arming output
signal, (ie. The tally for GP Out 1 will be on GP In 1).
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