Section V
Control Interface Details
006-0006452 MPC-1500 Operator Guide
Rev P
39 of 48
03/03/2021 www.synqor.com
Digital Input/Output Control Signals
There are 2 input and 5 output digital signals available on the User I/O female high-density DB15
connector. The pin assignments and functions of these digital I/O signals are as follows:
Signal
Pin Number
Function
+5 V
8
Bias voltage with minimal current drive usable as a pull-up voltage
for the open collector output signals (100 Ω source resistance)
GND
4 and 5
Ground reference for all digital inputs and outputs
ACIN_GOOD
7
Open collector* output where “low” indicates AC Input voltage is
within range
OUT_OK
14
Open collector* output where “low” indicates AC Output voltage
is within range
OVER_TEMP
15
Open collector* output where “low” indicates that the MPC is at
or above its maximum temperature
REMOTE_START
12
Drive this line “high” with ≥ 5 mA to enable the MPC outputs
SHUTDOWN
13
Drive this line “high” with ≥ 5 mA to disable the MPC outputs
*with an internal 50 kΩ Pull-up Resistor to 5 V and ESD Protection Diodes.
RS232 Serial Interface
The same User I/O female high-density DB15 connector also provides for an RS232 interface
between the MPC and the host/system computer. The interface has a 115.2 k baud with eight
data bits, no parity bit and one stop bit. The pin assignments and functions for this RS232
interface are as follows:
Signal
Pin Number
Function
GND
4 and 5
Ground reference for RX and TX signals
RX
3
RS232 DCE/MPC Device Receive signal
TX
2
RS232 DCE/MPC Device Transmit signal
