Color Power Supply HMI504T HMI520T HMI530T HMI550T
Red +Output/+24 Vdc + + 24V 24V +DC24V
Black -Output/+24 Vdc return - GND GND -DC 24V
Shield Case ground FG
The power connector on the Silver Series is a terminal block with wire clamps. Lugs
are not required.
Connect the OIT to the PLC
Each PLC supported by Maple Systems has its own wiring requirements. Maple Systems offers OIT-to-PLC
communication cables for most PLCs that are built to any length and tested for high reliability. Most cables are
available for next-day shipment from Maple Systems. Components and instructions necessary to construct your
own OIT-to-PLC communications cables are also available. Refer to Maple Systems’ Technical Note 1061 or visit
our Web site.
HMI520T/530T/550T HMI504T
Port 1
PLC (RS-232)
Port 2
PLC (RS485) / PC (RS232)
Pin # Function Function Function
1 Aux-TXD RXD- RXD-
2 TXD RXD+ RXD+
3 RXD TXD- TXD-
4 (no connection) TXD+ TXD+
5 GND GND GND
6 Aux-RXD (no connection) TXD (PLC)
7 (no connection) TXD TXD (PC)
8 (no connection) RXD RXD (PC)
9 (no connection) (no connection) RXD (PLC)
1010-1001a, Rev 02
12 Silver Series Installation & Operation Manual
Pinout for the OIT Ports
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