Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 15)

Section 2: Installation
9
2.5. CABLE AND CONNECTOR REQUIREMENTS
Siemens Bus Connector - (SINEC L2) Prt. # 6ES7-972-0BA20-OXAO
Siemens Cable LWF, CMX 75C (shielded) - (SINEC L2) Prt. #6XV1-830-OAH10
Figure 2-6
2.6 CABLE PIN DEFINITIONS
Pin 1 - Ground (outer braided shield)
Pin 3 - Signal “B” (Red)
Pin 8 - Signal “A” (Green)