System Connector Pinout - Honeywell SC1000 Owner's Manual

5.2 System Connector Pinout

Pin Name
1 N/C
2 RS-232 IN
3 RS-232 OUT
4 CTS
5 RTS
6 DSR
7 GND
8 DCD
9 FUNC 2
10 FUNC 1
11 FUNC 0
12 RS-485 TB
13 RS-485 TA
14 L1
15 L2
16 L3
17 L4
18 N/C
19 DGND
20 DTR
21 FUNC 3
22 RI
23 N/C
24 RS-485 RB
25 RS-485 RA
page 36 008-0608-00
Table 5-2: System Connector
Function
No Connection
RS-232 Data In
RS-232 Data Out
RS-232 Clear to Send (connected to pin 5)
RS-232 Request to Send (connected to pin 4)
RS-232 Data Set Ready
RS-232/RS-485 reference
RS-232 Data Carrier Detect (not connected)
Function Input #2:.Clear Peak/Valley & Limits
Function Input #1: Tare Off for all channels
Function Input #0
RS-485 Transmit B
RS-485 Transmit A
Limit 1 Output (Open Collector)
Limit 2 Output (Open Collector)
Limit 3 Output (Open Collector)
Limit 4 Output (Open Collector)
No Connection
DGND (Digital Ground)
RS-232 Data Terminal Ready (not connected)
Function Input #3: Tare On for all channels
RS-232 Ring Indicator (pulled up to 5V)
No Connection
RS-485 Receive B
RS-485 Receive A
The Limit Output pins and Function Input pins are electrically isolated from the rest of
the instrument.
The RS-232 and RS-485 communications pins are electrically isolated from the rest of
the instrument.
The RS-232 and RS-485 interfaces are exclusive; an instrument cannot have both.
Input/Output Reference Pin
N/A
Input 7
Output 7
N/A N/A
N/A N/A
Output 7
Reference -
N/A N/A
Input 19
Input 19
Input 19
Output 7
Output 7
Output 19
Output 19
Output 19
Output 19
N/A
Reference
N/A N/C
Input 19
Output
N/A N/C
Input 7
input 7