Industrial Data Systems IDS 550 - Manual (Page 15)

. 3 F3 Q3 CR5 CR15
. 2 F2 Q2 CR4 CR14
. 1 F1 Q1 CR3 CR13
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5. Interface Port Connections
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The IDS550 has 3 interface ports:
1. SERIAL CHANNEL 1: RS232 or CURRENT LOOP
The input of Channel 1 is normally used for interfacing to a
weigh meter.
2. SERIAL CHANNEL 2: RS232, CURRENT LOOP, or RS485.
Channel 2 is used for interfacing to a second weigh meter
or a computer.
3. PARALLEL TTL : 9 TTL outputs, 2 TTL inputs
Used for optional Centronix compatible printer output and
control functions (bulk-weigh, red light/green light, etc.)
SERIAL CHANNEL 1 WIRING LIST ( 25 PIN 'D' CONNECTOR )
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SIGNAL PIN #
#1 RS232 RXD 3 ---- Switch inside IDS550 in
#1 RS232 TXD 2 RS232 position.
#1 RS232 CTS 5 ----------
#1 RS232 RTS 4 | X |
GND 7 ----------
#1 CUR LOOP IN + 8 ---- Switch inside IDS550 in
#1 CUR LOOP IN - 22 Current Loop position.
#1 CUR LOOP OUT 24 ----------
| X |
#1 TTL RTS OUT 25 ----------
+5R (soft 5V) 6
SERIAL CHANNEL 1 EXAMPLE CONNECTIONS
RS232 INPUT CONNECTIONS: (usually used for scale input)
RXD pin 3
GND pin 7
RS232 OUTPUT CONNECTIONS: (usually used for printer output)
TXD pin 2
CTS pin 5 -- handshake input from printer
GND pin 7
CURRENT LOOP INPUT: (usually used for scale input)
CL IN + pin 8
CL IN - pin 22