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The GP IO Box is available with either 24 or 48 I/O circuits. Inputs are 25-pin D-type male connectors. Outputs are 25-
pin D-type female connectors. Mating connector kits are available to order. Both the input and the output circuits are fully
isolated from the RIO electronics and power supply.
Refer to page 4-13 for the connector pinouts.
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Output switch closures are via DIL relay – the contact rating is 100Vdc, 125Vac, 100mA max. Do not use these
outputs to directly switch capacitive or reactive loads; always use a separate external relay with suitable contact rating.
If used for discrete track arming with an associated tally, the tally must return to the same number input as the arming output
signal, (ie. the tally for GPI Out 1 will be on GPI In 1).
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Inputs are is triggered by applying an AC or DC voltage of between 4V and 30V between each pair of contacts. The current
drawn is approximately 10mA. A supply voltage suitable for the input trigger is available on the output connectors and a
return 0V reference is provided on the input connectors.
The input and output signals can be either latching or momentary; this is individually assigned in software using the touch
screen. When set to momentary, the input signal trigger duration must be greater than 50mS.
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Installation simply requires that the unit be added into the existing +9<470 using an Ethernet cable. The connection
must be made directly to the Blackrock or the SSL Network hub and not via any other network.
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The internal mains power supplies are of the fully isolated type. It is recommended that a separate earthed lead is
attached to the rear of the chassis and connected to a permanent nearby ground connection. An M3 threaded insert is
provided on the rear panel for the ground lead.
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The default ‘BOX’ switch setting for the initial GP IO unit is ‘1’. If a second unit is connected to the same console network
then the address switch if the second unit will need to be set to position ‘2’ – and so on for each additional unit up to a
maximum of 15.
The ‘CONSOLE’ switch will only require adjustment in installations where there will be more than one console connected
to the same SSL network. The switch must be set to the same position as the console ID switch (located beneath the
centre control tile) in order for the console to communicate with a GP IO box. The default setting of both ID switches
is 1. It is not possible for two consoles to share control of the same IO unit.
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#$$%#
State Indication
Flashing quickly Ethernet activity
Flashing slowly Network not connected
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State Indication
Steady illumination Both PSUs powered
Flashing slowly One PSU powered
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