19/23
Version: 4.0/1
vsm LCD Button Panels (LBP)
vsm LCD Button Panels User Manual
8.3.2
GPI-Interface
Connectors for rear GPI-interface:
8-Pin connector locked with two screws (MC 1,5/ 8-STF-3,81)
Separate plug not included for standard LBP delivery.
Each LBP panel features two dry relays-outputs and 2 opto-coupled TTL-inputs.
Looking at the picture of the connector on the right hand side, you will find it labled:
O2
–
O1
–
I2
–
I1
–
I_______I
I_______I
I_______I
I_______I
Dry
Dry
Input/Gnd
Input/Gnd
Relay
Relay
[0…12VDC]
[0…12VDC]
OUT-No. 2
OUT-No. 1
IN-No.2
IN-No.1
This Interface is a small signal interface only.
To avoid damage, do not exceed 12VDC/50mA for each relay-output.
The galvanically isolated
DC-TTL-Inputs are able to “set” a readable input by either shorting the input to ground, or,
by supplying any 5VDC-voltage and undershooting 2,3VDC respective to ground.
We suggest using our separate stand-alone GPIO-unit for switching higher current or reading inputs up to 12VDC.
Possible GPI – Input wiring and control options: