emu3/emu3ACO Operation Guide 11
Version 2.1
Installation Instructions
GPI function
See “Setting up power shedding” on page 19 for details of controlling power shedding from the IPE Dashboard.
GPI 1-6 (15-way D-type) connector
The pinout for the 15-pin D-type
GPI 1–6
connector on the unit is shown in the table below:
PIN
FUNCTION
1
Input Opto Isolator 1
2
Input Opto Isolator 2
3
Input Opto Isolator 3
4
Input Opto Isolator 4
5
Input Opto Isolator 5
6
Input Opto Isolator 6
7
0v
8
0v
9
Input Opto Isolator 1
10
Input Opto Isolator 2
11
Input Opto Isolator 3
12
Input Opto Isolator 4
13
Input Opto Isolator 5
14
Input Opto Isolator 6
15
Fused +5V dc
•
The opto isolator inputs are NOT polarity dependent. Operating voltage is 5Vdc to 30Vdc (12Vdc nominal).
•
The 5Vdc output available on the connector is current limited and is designed to only operate the input opto
isolators.
•
The absolute minimum operating voltage is around 3.6V, so driving them from a 5V supply via an open collector
output is not reliable.
•
Since the minimum operating voltage is low it is possible that, for a high DC supply (e.g. 15V and above), driving
the opto via an open collector output may cause the opto to not turn off reliably, due to the residual voltage
within the circuit.
