evertz 5601MSC - M4 Grounding Stud; Mounting and Cooling; Connecting the General Purpose Inputs and Outputs; Figure 3-2: Typical GPI Circuitry

Model 5601MSC
Model 5601MSC Master SPG/Master Clock System
Page - 64 Revision 2.2 INSTALLATION
3.1.12. M4 Grounding Stud
The M4 grounding stud is used to provide a ground point to the 5601MSC chassis. It is located under
the REF IN LOOP connectors. It can be used for protective earthing in installations that require it. An
M4 or #8 ring terminal can be used with the provided M4 nut and lock washer.
3.2. MOUNTING AND COOLING
The 5601MSC is equipped with rack mounting ears and fits into a standard 19 inch by 1 ¾ inch (483
mm x 45 mm) rack space. An optional rear support kit is available for rear mounting in a rack. The main
board and power supplies are forced-air cooled by two fans in each power supply (or fan module). Both
power supply slots must be occupied by a power supply or fan module at all times to ensure proper
operating temperatures inside the unit. The air is drawn in through slits along the edges of the front
panel and exhausted out the sides of the unit. Ensure that the exhaust holes along the side of the unit
are not blocked by rack supports or cabling otherwise the unit may overheat. A system fault is activated
when the temperature inside the unit exceeds operating limits.
3.3. CONNECTING THE GENERAL PURPOSE INPUTS AND OUTPUTS
The 15-pin female GPIO connector has 2 general purpose inputs and 2 general purpose outputs. The
GPI inputs are active low. This means that if an input is floating (not connected) then it will not be
activated. The GPIs can be activated by connecting the GPI input pin to Ground using a button, switch,
relay or an open collector transistor. The GPIs can be configured to send out SNMP traps on activation.
The GPO outputs are internally pulled up to +5 volts DC. When a GPO activates, the GPO pin is pulled
to ground. Care must be taken to limit the sink current to less than 50mA or damage to the GPO will
result. The functions of the general purpose outputs are set using the GPO 1 Mode and GPO 2 Mode
menu items on the GENERAL Setup menu. Note that in event of power being removed from the
5601MSC, the GPOs will appear to be a 20K sink to ground.
Figure 3-2 and Figure 3-3 shows the circuitry for each of the I/O pins.
I/O Pin
~20mA
+5 V
Maximum voltage applicable
to GPI Pin = ±10 V
Maximum resistance to ground
to trigger GPI = 5 K Ohm
Figure 3-2: Typical GPI Circuitry
I/O Pin
20 K Ohm
10 Ohm
+5 V
Maximum sink current of GPO = 50mA
Figure 3-3: Typical GPO Circuitry